Technical notes and articles migrated from Ghost, organized into iOS, Android, Unity, and Other.https://needone.app/https://needone.app/blog/6-most-useful-git-commands/https://needone.app/blog/6-most-useful-git-commands/If you prefer to use commands through git, here are the 6 most useful git commands you can use in the project. Check unmerged branches If we have multiple branches and want to findSun, 13 Sep 2020 21:20:00 GMThttps://needone.app/blog/a-summary-of-use-enum-in-swift/https://needone.app/blog/a-summary-of-use-enum-in-swift/Enumeration type is a common type in many programming languages, which normally presents a set of limited status for a program, such as list all the directions for a compass: enumSun, 28 Feb 2021 20:48:10 GMThttps://needone.app/blog/ac-pocket-guide-users/https://needone.app/blog/ac-pocket-guide-users/My wife built a "bridge" I am the OP on the OZBargin post ( link ) and also the developer of the AC Pocket Guide ( iOS link ). Today (11 Apr 2020) I want to say sorry to you . As fFri, 10 Apr 2020 23:18:29 GMThttps://needone.app/blog/an-easy-example-on-how-to-use-viewmodel-and-livedata/https://needone.app/blog/an-easy-example-on-how-to-use-viewmodel-and-livedata/Jetpack broken up into four main areas: Architecture, Foundation, Behavior and UI. ViewModel ViewModel helped to achieve two things: help the project to adopt MVVM architecture holWed, 22 Jul 2020 01:44:43 GMThttps://needone.app/blog/android-are-you-familiar-with-oncreate-onstart-onresume/https://needone.app/blog/android-are-you-familiar-with-oncreate-onstart-onresume/running order of onCreate, onStart, onResume and onDestory .... in Android using KotlinMon, 06 Jul 2020 02:24:46 GMThttps://needone.app/blog/android-life-cycle/https://needone.app/blog/android-life-cycle/Introduction Due to some requirements from work, I was asked to immigrate current iOS product into Android. If you are like me, who are mainly working on iOS, but want to put handsTue, 10 Jul 2018 23:59:00 GMThttps://needone.app/blog/are-you-familar-with-viewwillappear-viewdidappear-viewdidload-viewwilldisappear-and-viewdiddisappear/https://needone.app/blog/are-you-familar-with-viewwillappear-viewdidappear-viewdidload-viewwilldisappear-and-viewdiddisappear/Introduction Before this, let me ask you what is the running order of viewWillAppear , viewDidAppear , viewDidLoad , viewWillDisappear and viewDidDisappear ? If you know the answerFri, 07 Apr 2017 22:56:00 GMThttps://needone.app/blog/australia-driving-test/https://needone.app/blog/australia-driving-test/Australian Driving Test 2019 version. Official data for all States collected from their official websites, including: * New South Wales (NSW), Roads and Maritime Services (TMR) * VSun, 20 Oct 2019 20:25:44 GMThttps://needone.app/blog/australian-citizenship-test-pass/https://needone.app/blog/australian-citizenship-test-pass/Australia Citizenship Test in 2019, which will answer almost every question that you need before you attend the test. Available on Google Play appFri, 02 Aug 2019 01:51:07 GMThttps://needone.app/blog/australian-slang/https://needone.app/blog/australian-slang/A MUST have app while travelling and living in AustraliaMon, 15 Apr 2019 20:51:40 GMThttps://needone.app/blog/authentication-in-restful-api/https://needone.app/blog/authentication-in-restful-api/RESTful API is a protocal based on HTTP. Sometimes we want to encrypt the RESTful API content while using. There are three encryption in practise: 1. HTTP Basic Authentication HTTPWed, 16 Aug 2017 22:29:00 GMThttps://needone.app/blog/barcode-and-qr-code-reader/https://needone.app/blog/barcode-and-qr-code-reader/The most fastest & easy-to-use Barcode/QR Reader - download now for FREE! FEATURES Code Scanner - scans QR codes & barcodes Support more than 10 formats, includes ISBN, product barThu, 04 Oct 2018 05:06:00 GMThttps://needone.app/blog/bottom-sheet-dialog-implementation-in-kotlin/https://needone.app/blog/bottom-sheet-dialog-implementation-in-kotlin/To create a bottom sheet dialog in Kotlin, you can use the BottomSheetDialog class from the Android Support Library, which is a built-in package. Here's an example of how you can uSat, 17 Dec 2022 21:59:45 GMThttps://needone.app/blog/bridging-legacy-apis-with-mainactor-assumeisolated/https://needone.app/blog/bridging-legacy-apis-with-mainactor-assumeisolated/Despite strict concurrency checking having been available for some time, many official Apple APIs remain inadequately adapted—a situation likely to persist for the foreseeable futuWed, 04 Mar 2026 23:25:49 GMThttps://needone.app/blog/certifate-pinning-public-key-pinning/https://needone.app/blog/certifate-pinning-public-key-pinning/Certificate pinning and public key pinning are both techniques that are used to enhance the security of a network connection by ensuring that the client trusts only a specific certWed, 22 Feb 2023 18:00:18 GMThttps://needone.app/blog/certificate-pinning-and-public-key-pinning-in-kotlin/https://needone.app/blog/certificate-pinning-and-public-key-pinning-in-kotlin/With the last article ( Certificate pinning and Public key pinning ), we know the concept of Certificate pinning and Public key pinning, and how to implement them in iOS. This artiFri, 24 Feb 2023 18:00:21 GMThttps://needone.app/blog/codable-in-ios-development/https://needone.app/blog/codable-in-ios-development/codable in swift, and Decoeable, encodable exampleFri, 28 Aug 2020 21:27:16 GMThttps://needone.app/blog/command-pattern-in-swift/https://needone.app/blog/command-pattern-in-swift/Many of us have heard about the Command pattern or used them in the development, which is a behavioral design pattern in which an object is used to encapsulate all of the informatiFri, 30 Dec 2022 22:09:46 GMThttps://needone.app/blog/companion-object-in-kotlin/https://needone.app/blog/companion-object-in-kotlin/Kotlin provides a brand new keyword companion which not exists in other programming languages. But don't be panic, it is not something new when you have one step closer. A companioTue, 06 Dec 2022 21:26:27 GMThttps://needone.app/blog/compiler-directives-in-swift/https://needone.app/blog/compiler-directives-in-swift/This post is going to list some of the most frequently used compiler directives in Swift, compatible in Swift 3/4/5. Someone might call this preprocessor directives , but they areSun, 08 Jan 2023 20:20:00 GMThttps://needone.app/blog/constants-in-objective-c/https://needone.app/blog/constants-in-objective-c/Recently I was working on a legacy project written in Objective-C, which reminded me of the early days when working on Objective-C projects. In the code I saw few things like the fSat, 12 Dec 2020 22:31:17 GMThttps://needone.app/blog/constructor-injection-property-injection-or-method-injection/https://needone.app/blog/constructor-injection-property-injection-or-method-injection/Dependency Injection is a design pattern that is providing another object with its dependencies, instead of having the object created or managed themselves. There are three main tySun, 11 Dec 2022 20:24:20 GMThttps://needone.app/blog/contenthugging-and-contentcompressionresistance/https://needone.app/blog/contenthugging-and-contentcompressionresistance/In Swift, it is quite common to see ContentHugging and ContentCompressionResistance either when we are using the storyboard or code to render the user interfaces in UIStackView . TThu, 08 Dec 2022 20:31:26 GMThttps://needone.app/blog/create-an-auto-build-script-for-aseprite-on-mac-os/https://needone.app/blog/create-an-auto-build-script-for-aseprite-on-mac-os/Aseprite is a famous 2D pixel art tool that allow you to create 2D animations, sprites, and any kind of graphics for games. It is not free, you can get a copy from Steam for USD $1Tue, 10 Apr 2018 04:10:00 GMThttps://needone.app/blog/data-racing-in-swift/https://needone.app/blog/data-racing-in-swift/A data race in Swift occurs when two or more threads access the same memory location simultaneously and at least one of them is writing to it, without proper synchronization. ThisFri, 03 Feb 2023 16:00:33 GMThttps://needone.app/blog/days-gone-widget/https://needone.app/blog/days-gone-widget/Dear time master, Thanks for downloading this app. Time travels fast, with days gone app we can put a nice-looking widget on your Home Screen so we would know where you are duringThu, 31 Dec 2020 21:11:00 GMThttps://needone.app/blog/decorator-in-unity/https://needone.app/blog/decorator-in-unity/Decorator in UnityThu, 25 Jun 2020 12:19:30 GMThttps://needone.app/blog/default-actor-isolation-a-great-intention-with-new-challenges/https://needone.app/blog/default-actor-isolation-a-great-intention-with-new-challenges/While the primary goal of Swift’s strict concurrency checking is noble, it has introduced significant friction in single-threaded scenarios. Developers often find themselves clutteWed, 04 Mar 2026 22:57:53 GMThttps://needone.app/blog/default-ios-url-schemas/https://needone.app/blog/default-ios-url-schemas/The following is a list of default URL Schemas supported natively in iOS (all versions): Objective-C // Make a phone call [[UIApplication sharedApplication] openURL:[NSURL URLWithSSat, 02 Jan 2016 22:19:00 GMThttps://needone.app/blog/delete-a-git-branch-locally-and-remotely/https://needone.app/blog/delete-a-git-branch-locally-and-remotely/Delete a Git branch locally and remotelyThu, 18 Jun 2020 21:52:17 GMThttps://needone.app/blog/difference-between-activity-and-requireactivity-in-kotlin/https://needone.app/blog/difference-between-activity-and-requireactivity-in-kotlin/activity property In the Android framework, the Activity class represents an app's UI and provides an interface for the app to interact with the system. The activity property in aMon, 23 Jan 2023 16:00:55 GMThttps://needone.app/blog/difference-between-layoutifneeded-vs-setneedslayout/https://needone.app/blog/difference-between-layoutifneeded-vs-setneedslayout/As many of iOS developer known, layoutIfNeeded and setNeedsLayout are two methods that can be used to update the layout of a view and its subviews. But what are their differences?Mon, 12 Dec 2022 20:27:03 GMThttps://needone.app/blog/download-image-from-url-in-kotlin/https://needone.app/blog/download-image-from-url-in-kotlin/In Android, we can get the image from synchronously and asynchronously, but it is more common to see in the later. Download image synchronously To download an image from a URL in KMon, 20 Feb 2023 18:00:59 GMThttps://needone.app/blog/encode-url-in-kotlin/https://needone.app/blog/encode-url-in-kotlin/In Kotlin, you can use the URLEncoder class to encode a URL string so that it can be safely transmitted over the internet. The URLEncoder class is part of the Java standard libraryWed, 01 Feb 2023 16:00:20 GMThttps://needone.app/blog/encode-url-in-swift/https://needone.app/blog/encode-url-in-swift/It is quite common to see that we can correctly set up the HTTP header, token, body and POST/GET methods in our iOS code, but we still can't get the right response. Here is an erroWed, 25 Jan 2023 16:00:47 GMThttps://needone.app/blog/equatable-and-comparable-in-swift/https://needone.app/blog/equatable-and-comparable-in-swift/It is quite common that we are required to compare two custom objects in Swift, luckily Swift has provided some built-in protocol allows us to do this in a "swift" way. Equatable ITue, 13 Dec 2022 21:14:42 GMThttps://needone.app/blog/export-ipa-file-from-xcode-and-install-on-your-mobile/https://needone.app/blog/export-ipa-file-from-xcode-and-install-on-your-mobile/Generate ipa from swift xcode, install ipa to mobile deviceThu, 07 Feb 2019 06:55:37 GMThttps://needone.app/blog/extract-the-debug-or-crash-log-from-iphone-ipad/https://needone.app/blog/extract-the-debug-or-crash-log-from-iphone-ipad/For Real devices Open Settings app Tap Privacy Tap Analytics & Improvements Tap Analytics Data There might be quite a lot of Data, so try to pinpoint the possible one using date: 6Wed, 05 Aug 2020 05:35:54 GMThttps://needone.app/blog/fastlane-practise-with-android-and-ios-with-examples/https://needone.app/blog/fastlane-practise-with-android-and-ios-with-examples/Fastlane Features "The easiest way to build and release mobile apps". Which handles the majority of the manual works Fastlane has the following features: FREE Build Alpha/Beta/ProdThu, 05 Jul 2018 22:05:00 GMThttps://needone.app/blog/format-currency-in-swift/https://needone.app/blog/format-currency-in-swift/Recently I have done quite an amount of work on formatting currency in Swift project, here are some tricks on how to format number in Swift: Format currency with auto currency symbMon, 13 Feb 2023 18:00:56 GMThttps://needone.app/blog/generic-type-vs-any-in-swift/https://needone.app/blog/generic-type-vs-any-in-swift/Generic type In Swift, a generic type is a placeholder for a specific type that is specified when the generic type is used. A generic type allows you to write flexible and reusableMon, 06 Mar 2023 18:00:09 GMThttps://needone.app/blog/get-and-set-a-state-in-react/https://needone.app/blog/get-and-set-a-state-in-react/State is a JavaScript object that lives inside each of the component, We can aaccess it via this.state . Unlike JQuery and Backbone , DOM is manipulated indirectly in React , whichThu, 10 Nov 2016 22:35:00 GMThttps://needone.app/blog/get-current-week-in-swift/https://needone.app/blog/get-current-week-in-swift/To get the current week in Swift 5, you can use the Calendar and DateComponents classes to calculate the week number for the current date. Here's an example of how you might do thiWed, 08 Feb 2023 18:00:39 GMThttps://needone.app/blog/get-location-coordinates-using-cllocationmanager-in-swift/https://needone.app/blog/get-location-coordinates-using-cllocationmanager-in-swift/To get the location (latitude and longitude) of a device in Swift, you can use the Core Location framework, which is an official library from Apple. Only 2 steps are required, so iFri, 27 Jan 2023 16:00:14 GMThttps://needone.app/blog/get-start-with-rabbitmq/https://needone.app/blog/get-start-with-rabbitmq/RabbitMQ is an open source & enterprise level messsage broker using AMQP protocal. The AMQP protocol is designed for asychronization and message dispatch. RabbitMQ can be used in tThu, 21 Sep 2017 00:11:00 GMThttps://needone.app/blog/git-merge-vs-git-rebase/https://needone.app/blog/git-merge-vs-git-rebase/TLDR Both git rebase and git merge are used to synchronise changes between branches. The difference is git rebase will revise the commits but keep a clean organised history, whileTue, 12 Jan 2021 20:34:16 GMThttps://needone.app/blog/have-you-tried-xctunwrap-before/https://needone.app/blog/have-you-tried-xctunwrap-before/What is XCTUnwrap and how to use it to help you effectively while you are doing the unit test? XCTUnwrap is a utility function that is used in unit tests to unwrap optional values.Wed, 28 Dec 2022 19:54:04 GMThttps://needone.app/blog/how-to-auto-just-text-size-in-android/https://needone.app/blog/how-to-auto-just-text-size-in-android/Most of the time we can display the text as follows: <TextView android:id="@+id/text_question_no" android:layout_width="wrap_content" android:layout_height="wrap_content" androiSat, 10 Oct 2020 23:15:31 GMThttps://needone.app/blog/how-to-determine-whether-a-mobile-device-is-muted-or-not-on-iphone-ipad/https://needone.app/blog/how-to-determine-whether-a-mobile-device-is-muted-or-not-on-iphone-ipad/On iOS devices, there are mainly two types of sounds: Ringtones and reminders: Including system sounds such as phone calls, text messages, notifications (also including key tones,Tue, 23 Feb 2021 11:55:43 GMThttps://needone.app/blog/how-to-do-a-deep-cleaning-for-pod/https://needone.app/blog/how-to-do-a-deep-cleaning-for-pod/If you are like me, the project is still using the pod to manage the libraries and frameworks. We need to clean the projects from time to time. The following command can help us toWed, 19 Jul 2023 00:25:42 GMThttps://needone.app/blog/how-to-enable-imessage-on-your-android-devices-for-free/https://needone.app/blog/how-to-enable-imessage-on-your-android-devices-for-free/This article demonstrates how to connect iMessage service to your Android phone/pad so that you can contact your iPhone friends freely from now on. To finish the article will takeMon, 09 Nov 2020 20:22:31 GMThttps://needone.app/blog/how-to-find-your-google-play-id/https://needone.app/blog/how-to-find-your-google-play-id/For most Android phone users, Play Store is already installed on the phone already. It is a portal for you to download and install new apps with just few taps. The icon of the PlayThu, 16 Apr 2020 00:07:03 GMThttps://needone.app/blog/how-to-make-a-custom-view-in-kotlin/https://needone.app/blog/how-to-make-a-custom-view-in-kotlin/To create a custom view in Kotlin, you can create a new subclass of View and override the onDraw method to draw the view's content. Then, you can add any additional properties or bWed, 11 Jan 2023 20:13:39 GMThttps://needone.app/blog/how-to-use-swift-package/https://needone.app/blog/how-to-use-swift-package/What is Swift Package? According to Apple's doc: Swift packages are reusable components of Swift, Objective-C, Objective-C++, C, or C++ code that developers can use in their projecFri, 30 Oct 2020 21:46:24 GMThttps://needone.app/blog/how-to-use-swiftui-and-uikit-together/https://needone.app/blog/how-to-use-swiftui-and-uikit-together/SwiftUI is the modern way to build interfaces on Apple platforms, but most production apps still rely on UIKit. The good news is that you do not need a full rewrite. Apple designedThu, 08 Jan 2026 21:21:12 GMThttps://needone.app/blog/http-encoding/https://needone.app/blog/http-encoding/HTTP encoding, also known as percent-encoding or URL encoding, is a way of encoding special characters in URLs and other HTTP data, such as headers and body content. HTTP encodingMon, 30 Jan 2023 09:31:09 GMThttps://needone.app/blog/indirect-enums-in-swift/https://needone.app/blog/indirect-enums-in-swift/An indirect enum in Swift is an enum that can be used to define a recursive data structure. This means that one or more of its cases can refer to an instance of the same enum type.Fri, 03 Mar 2023 18:30:50 GMThttps://needone.app/blog/init-vs-convenience-init-in-swift/https://needone.app/blog/init-vs-convenience-init-in-swift/Initializers, also known as constructors in other programming languages, have two types: Designated init and Convenience init . They are used to initialize properties or customizeMon, 15 Feb 2021 12:12:23 GMThttps://needone.app/blog/install-ios-beta-in-xcode-for-simulators/https://needone.app/blog/install-ios-beta-in-xcode-for-simulators/Apple release the new iOS SDK every day, as the developer, we want to test our apps on those new SDK before they are officially released. For example, we want to have the iOS 17 beFri, 15 Sep 2023 21:13:59 GMThttps://needone.app/blog/instance-method-vs-static-method-vs-class-method-in-python/https://needone.app/blog/instance-method-vs-static-method-vs-class-method-in-python/In a python class, there are three kinds of methods: Instance method Static method Class method Example explained Look at the following code, have a test for yourself, what are theThu, 29 Mar 2018 23:37:00 GMThttps://needone.app/blog/introduction-to-coroutine-in-kotlin/https://needone.app/blog/introduction-to-coroutine-in-kotlin/A Coroutine is a lightweight thread of execution that can be suspended and resumed later. There are already many articles or topics covering this but this post is different, it isMon, 16 Jan 2023 16:00:02 GMThttps://needone.app/blog/ios14-how-to-show-all-your-photos-on-whatsapp/https://needone.app/blog/ios14-how-to-show-all-your-photos-on-whatsapp/iOS14: How to show all your photos on WhatsApp, instagram, facebookFri, 25 Sep 2020 06:14:14 GMThttps://needone.app/blog/iphone-ipad-how-to-get-free-apps-through-testflight/https://needone.app/blog/iphone-ipad-how-to-get-free-apps-through-testflight/TestFlight is an beta testing app/service offered by Apple, which you can download apps from the app developer and use it for FREE. Only 2 steps are needed: Step 1 : Download TestFThu, 11 Jun 2020 07:20:40 GMThttps://needone.app/blog/iphone-ipad-redeem-free-promo-code/https://needone.app/blog/iphone-ipad-redeem-free-promo-code/This will happen when developers decides to give out some free apps, which sometimes you will see the promo code like this EAJXJEXL7MJH . As many of you might know how to redeem thThu, 31 Dec 2020 22:15:00 GMThttps://needone.app/blog/iterator-and-generator-in-es6/https://needone.app/blog/iterator-and-generator-in-es6/Iterator and Generator are commonly used features in ES6. In this post, we will walk through the key features of iterator and generator in depth. Iterator In JavaScript, an objectTue, 11 Jul 2017 22:39:00 GMThttps://needone.app/blog/key-value-coding-and-key-value-observing-in-objective-c/https://needone.app/blog/key-value-coding-and-key-value-observing-in-objective-c/What is KVO/KVC KVC(Key-Value Coding) is a coding style which coming from Functional Programming , KVO(Key-Vlaue Observing) is the technology that underlies Cocoa Bindings, and itThu, 16 Nov 2017 23:32:00 GMThttps://needone.app/blog/keyword-lazy-in-swift/https://needone.app/blog/keyword-lazy-in-swift/lazy variables are variables will be computed until accessing. In other words, lazy variables won't have the real value until get called/used. As lazy variables can be re-assigned,Thu, 31 Dec 2020 00:54:28 GMThttps://needone.app/blog/kids-smart-pad/https://needone.app/blog/kids-smart-pad/Kids Smart PadThu, 05 Sep 2019 01:34:00 GMThttps://needone.app/blog/kotlin-lazy-vs-lateinit-when-to-use-each/https://needone.app/blog/kotlin-lazy-vs-lateinit-when-to-use-each/Kotlin lazy vs lateinit : When to Use Each Kotlin gives you two common ways to defer initialization of a property: lazy and lateinit . They look similar on the surface, but they soTue, 30 Dec 2025 20:20:01 GMThttps://needone.app/blog/lazy-in-kotlin/https://needone.app/blog/lazy-in-kotlin/In the Kotlin programming language, the term "lazy" typically refers to a type of property or variable that is only initialized when it is first accessed, rather than when the contFri, 10 Feb 2023 18:00:18 GMThttps://needone.app/blog/load-local-html-resource-on-android-using-webview/https://needone.app/blog/load-local-html-resource-on-android-using-webview/Local html and sources are necessary when you try to show an error page dealing with situations such as 404 , 500 and etc errors happened on remote server. And here is how: First,Mon, 27 Aug 2018 21:54:00 GMThttps://needone.app/blog/manage-both-python2-and-python3-on-your-mac/https://needone.app/blog/manage-both-python2-and-python3-on-your-mac/Step 1: Install Python3 Use brew install python to install python3 on the mac, current version is Python 3.6.5 . If your mac has a python2 already, brew will ask for an upgrade, whSun, 10 Jun 2018 22:12:00 GMThttps://needone.app/blog/method-chaining-in-objective-c-and-make-your-own-chaining-methods-to-create-a-calculator/https://needone.app/blog/method-chaining-in-objective-c-and-make-your-own-chaining-methods-to-create-a-calculator/When I was using the Masonry, I was shocked by author’s thoughts on bring Functional Programming to objective-c, which present a clean and concise way on developing. Normally a chaThu, 01 Jun 2017 11:12:00 GMThttps://needone.app/blog/mysql-error-1071-42000-at-line-specified-key-was-too-long-max-key-length-is-767-bytes/https://needone.app/blog/mysql-error-1071-42000-at-line-specified-key-was-too-long-max-key-length-is-767-bytes/When I was doing the development with a recent project, I found out this err: Error: ERROR 1071 (42000) at line 50: Specified key was too long; max key length is 767 bytes See hereTue, 05 Jun 2018 23:48:00 GMThttps://needone.app/blog/nested-class-in-swift/https://needone.app/blog/nested-class-in-swift/A nested class in Swift is a class that is defined within another class. Some key features: Nested class have access to local variables or constants of the outer class unless theseMon, 17 Jul 2023 00:31:06 GMThttps://needone.app/blog/nested-method-in-swift/https://needone.app/blog/nested-method-in-swift/A nested method in Swift is a method or function that is defined within another function. Nested functions have the following characteristics: They have access to all variables andSat, 14 Jan 2023 11:43:22 GMThttps://needone.app/blog/non-blocking-in-kotlin-coroutines/https://needone.app/blog/non-blocking-in-kotlin-coroutines/Kotlin Coroutines Table Content 1, Introduction to Coroutine in Kotlin 2, Non-blocking in Kotlin Coroutines (This article) 3, Start and Suspend a Coroutine in Kotlin (incoming thisWed, 18 Jan 2023 19:43:07 GMThttps://needone.app/blog/ontriggerenter2d-v-s-oncollisionenter2d/https://needone.app/blog/ontriggerenter2d-v-s-oncollisionenter2d/OnCollisionEnter2D : Some collision really happened, means two objects collide with each other. OnTriggerEnter2D : Collision not really happened when you set up Is Trigger is true.Sun, 14 Oct 2018 21:36:00 GMThttps://needone.app/blog/opensource-react-appstore-button-module/https://needone.app/blog/opensource-react-appstore-button-module/react-appstore-button version: 0.0.9 NPM URL: https://www.npmjs.com/package/react-appstore-button Github URL: https://github.com/arkilis/react-AppStore-Button What is this? An ReacThu, 03 Aug 2017 00:03:00 GMThttps://needone.app/blog/plist-file-in-ios/https://needone.app/blog/plist-file-in-ios/A Property List (PLIST) file is a file format used by macOS and iOS to store serialized data. It is often used to store data such as user preferences, settings, and other informatiSat, 24 Dec 2022 21:12:32 GMThttps://needone.app/blog/popup-custom-view-in-uikit/https://needone.app/blog/popup-custom-view-in-uikit/In UIKit, popup mainly can be: popup an alert using UIAlertController popup action sheet using UIAlertController . For more details, check this: Present action sheet in UIKit and SMon, 09 Jan 2023 20:21:00 GMThttps://needone.app/blog/popup-dialog-alert-in-swift/https://needone.app/blog/popup-dialog-alert-in-swift/As mentioned in the other article: Popup Custom View in UIKit : popup mainly can be: popup an alert using UIAlertController popup action sheet using UIAlertController. For more detWed, 11 Jan 2023 21:00:33 GMThttps://needone.app/blog/present-action-sheet-in-swift-uikit-swiftui/https://needone.app/blog/present-action-sheet-in-swift-uikit-swiftui/An action sheet is a component that displays a set of choices to the user in a modal format. UIKit In iOS, you can create an action sheet using a UIAlertController with the .actionThu, 05 Jan 2023 20:34:13 GMThttps://needone.app/blog/preview-in-swiftui/https://needone.app/blog/preview-in-swiftui/Once you have finished the SwiftUI code, it is always a good idea to preview it before implement any function code. Luckily, such feature is natively supported by SwiftUI - PreviewFri, 18 Dec 2020 22:02:17 GMThttps://needone.app/blog/property-in-swift/https://needone.app/blog/property-in-swift/Unlike other programming languages, there are three types properties in Swift. Stored Properties They are constants or variables of a class, and part of the class instances that usThu, 25 Feb 2021 11:53:01 GMThttps://needone.app/blog/property-wrappers-in-swift/https://needone.app/blog/property-wrappers-in-swift/What is Property Wrapper Property wrapper are a language feature that allows you to wrap a piece of code around a property in Swift world, which can help us to add additional behavMon, 19 Dec 2022 21:06:01 GMThttps://needone.app/blog/python-importing-explained/https://needone.app/blog/python-importing-explained/Python is a powerful and elegant language which makes people obsessed into it (such as me). However, many of the python users are still confused by two question: package importingSat, 05 Jan 2019 22:32:25 GMThttps://needone.app/blog/python-teltra-sms-sdk/https://needone.app/blog/python-teltra-sms-sdk/telstra-sms-sdk A fully tested Python SDK allow you to send sms in a more easy way! Current version: 0.0.7 Support Python version : >=python 2.6 (not python3) If you have any quFri, 31 Mar 2017 23:10:00 GMThttps://needone.app/blog/runblocking-in-kotlin/https://needone.app/blog/runblocking-in-kotlin/In previous post, we have gone through most of the key concepts and methods in Coroutine: Kotlin Coroutines Table Content 1, Introduction to Coroutine in Kotlin 2, Non-blocking inWed, 15 Feb 2023 18:00:46 GMThttps://needone.app/blog/rxswift-tutorial-part-1/https://needone.app/blog/rxswift-tutorial-part-1/a simple introudction on rxswift, including what is rxswift, how to use it and a quick example (with swift code) on demo that.Mon, 13 Mar 2023 19:34:41 GMThttps://needone.app/blog/rxswift-tutorial-part-2/https://needone.app/blog/rxswift-tutorial-part-2/In this article we will dig a bit more depth in some core concepts on 2 hours to master RxSwift - Part 1 . Section 1: Observable Like mentioned in the last article, an Observable iMon, 01 May 2023 04:49:30 GMThttps://needone.app/blog/rxswift-tutorial-part-3/https://needone.app/blog/rxswift-tutorial-part-3/Introduction In the previous post: 2 hours to master RxSwift - Part 1 (needone.app) and 2 hours to master RxSwift - Part 2 (needone.app) , we get to know the the core concept behinMon, 10 Apr 2023 19:50:22 GMThttps://needone.app/blog/scenedelegate-in-swift/https://needone.app/blog/scenedelegate-in-swift/In iOS, the SceneDelegate is a class that is responsible for managing the scenes in your app. A scene is a discrete unit of your app's user interface, such as a window or tab. TheMon, 06 Feb 2023 18:00:00 GMThttps://needone.app/blog/setup-visual-studio-code-for-unity-on-mac-2020/https://needone.app/blog/setup-visual-studio-code-for-unity-on-mac-2020/There are tons of articles online tells us it is 2020, we should use the Visual Studio code, which is a good coding tool (or IDE) with numerous extensions. This article is the compWed, 17 Jun 2020 21:26:18 GMThttps://needone.app/blog/singleton-in-kotlin/https://needone.app/blog/singleton-in-kotlin/In the Kotlin programming language, a singleton is a design pattern that allows you to create only one instance of a class. This is useful when you want to make sure that there isFri, 10 Mar 2023 18:00:44 GMThttps://needone.app/blog/singleton-in-objective-c-swift/https://needone.app/blog/singleton-in-objective-c-swift/What is behind the Singleton? Singleton: Instantiation of a class to ONLY one object Features of Singleton: One class only can have only one instance; It must can create this instaFri, 10 Nov 2017 23:30:00 GMThttps://needone.app/blog/sort-custom-objects-by-property-in-swift/https://needone.app/blog/sort-custom-objects-by-property-in-swift/Many of us have met the situation that we have an array/list of custom objects, and we want them can be sorted in a specific order. For example, we are have a group of people, andFri, 17 Feb 2023 18:00:16 GMThttps://needone.app/blog/start-and-suspend-a-coroutine-in-kotlin/https://needone.app/blog/start-and-suspend-a-coroutine-in-kotlin/Kotlin Coroutines Table Content 1, Introduction to Coroutine in Kotlin 2, Non-blocking in Kotlin Coroutines 3, Start and Suspend a Coroutine in Kotlin (This article) With the previFri, 20 Jan 2023 16:00:09 GMThttps://needone.app/blog/static-library-dynamic-library-and-frameworks-in-ios/https://needone.app/blog/static-library-dynamic-library-and-frameworks-in-ios/What you can get from this article: What are Static Library and Dynamic Library not just in iOS How do they work (in genertal) Some concepts about library Reduce coupling: if you wFri, 20 May 2016 21:19:00 GMThttps://needone.app/blog/swift-6-concurrency-mastering-isolated-any-and-isolation/https://needone.app/blog/swift-6-concurrency-mastering-isolated-any-and-isolation/Swift 6 introduces a suite of powerful new concurrency features and keywords. While many of these may not see daily use, encountering specific edge cases without a solid grasp of tWed, 04 Mar 2026 21:09:17 GMThttps://needone.app/blog/swift-compare-custom-class-struct/https://needone.app/blog/swift-compare-custom-class-struct/swift compare custom class or custom structSat, 15 Aug 2020 00:17:12 GMThttps://needone.app/blog/swiftlint/https://needone.app/blog/swiftlint/SwiftLint is a programming guide tool which can automatically check the code quality with certain rules such as https://github.com/github/swift-style-guide . The article will coverFri, 16 Oct 2020 21:08:37 GMThttps://needone.app/blog/trivia-one/https://needone.app/blog/trivia-one/Play with more than 3000 quizzes and questions, challenge yourself with all kinds of topics, General knowledges, history, vehicles, music, movies, sports, TV, geography, science, nature, and much more.Thu, 16 May 2019 09:54:05 GMThttps://needone.app/blog/type-safe-in-swift-kotlin/https://needone.app/blog/type-safe-in-swift-kotlin/Introduction Type safety in programming languages refers to the concept that variables and data structures are strongly typed and cannot be assigned values of different types . ThiThu, 08 Dec 2022 20:59:07 GMThttps://needone.app/blog/uikit-vs-swiftui-general-discussion/https://needone.app/blog/uikit-vs-swiftui-general-discussion/UIKit and SwiftUI are two different frameworks for building user interfaces on Apple platforms. UIKit UIKit is the older of the two frameworks, and has been around since the earlyMon, 27 Feb 2023 18:49:42 GMThttps://needone.app/blog/uitraitcollection-in-swift/https://needone.app/blog/uitraitcollection-in-swift/UITraitCollection is a class in the UIKit framework that defines a set of interface traits that specify the environment in which your app is running. These traits include the devicWed, 01 Mar 2023 18:00:28 GMThttps://needone.app/blog/undo-the-most-recent-local-commit-s-in-git/https://needone.app/blog/undo-the-most-recent-local-commit-s-in-git/Undo the most recent local commit(s) in GitTue, 09 Jun 2020 21:54:53 GMThttps://needone.app/blog/unity-are-you-familiar-with-awake-onenable-start-update-fixedupdate-and-ondestory/https://needone.app/blog/unity-are-you-familiar-with-awake-onenable-start-update-fixedupdate-and-ondestory/Unity: Are you familiar with Awake(), OnEnable(), Start(), Update(),FixedUpdate() and OnDestory()Mon, 15 Jun 2020 06:57:43 GMThttps://needone.app/blog/unity-example-shows-difference-of-canvas-ui-scale-modes/https://needone.app/blog/unity-example-shows-difference-of-canvas-ui-scale-modes/Unity: Real example shows the difference of three Canvas UI Scale Modes, Constant Pixel Size, Scale With Screen Size and Constant Physical SizeTue, 30 Jun 2020 22:23:12 GMThttps://needone.app/blog/unity-how-to-change-the-default-or-entry-animation-for-an-animator/https://needone.app/blog/unity-how-to-change-the-default-or-entry-animation-for-an-animator/When creating a new animation for a game object, by default in Unity, the first animation your created is the entry animation for a game object. Suppose we have two animation for aSat, 11 Jul 2020 07:42:16 GMThttps://needone.app/blog/unity-should-i-choose-kinematic-static-or-dynamic-for-rigidbody-2d-body-type/https://needone.app/blog/unity-should-i-choose-kinematic-static-or-dynamic-for-rigidbody-2d-body-type/When dealing with Rigidbody 2D, there are three key body types which determines how a game object move and react to collision. This post is the complete guide on how and when to usSun, 21 Jun 2020 00:52:09 GMThttps://needone.app/blog/use-extension-in-swift/https://needone.app/blog/use-extension-in-swift/Extension is a great feature in Swift, which can help us to create helper/utility variables and method, and etc. Use extension to conform protocols It is quite common to use protocFri, 26 Feb 2021 21:45:13 GMThttps://needone.app/blog/use-keystore-to-store-your-sensitive-in-kotlin/https://needone.app/blog/use-keystore-to-store-your-sensitive-in-kotlin/The keystore is a secure storage location in Android that is used to store encryption keys, digital certificates, and other sensitive information. The keystore is encrypted with aWed, 08 Mar 2023 18:00:18 GMThttps://needone.app/blog/use-openssl-to-create-public-key-and-private-key/https://needone.app/blog/use-openssl-to-create-public-key-and-private-key/Generally speaking, currently digital encryption methods can be divided into two main categories, symmetric encryption and asymmetric encryption . For symmetric encryption , the saSun, 07 Mar 2021 12:20:32 GMThttps://needone.app/blog/userdefault-vs-appstorage-in-swiftui/https://needone.app/blog/userdefault-vs-appstorage-in-swiftui/Both the @AppStorage and @UserDefault property wrappers in SwiftUI allow you to store and retrieve data using UserDefaults. However, there are a few key differences between the twoMon, 30 Jan 2023 16:00:20 GMThttps://needone.app/blog/vip-architecture-in-swift/https://needone.app/blog/vip-architecture-in-swift/Recently I joined a project where the architecture follows the Clean-Swift VIP Pattern. This article is an overview and some thoughts from a mobile developer’s perspective who haveSat, 24 Oct 2020 22:48:38 GMThttps://needone.app/blog/weapp-jandan/https://needone.app/blog/weapp-jandan/1. 效果图 (Final Screenshot) 2. 功能 (Features)： 无聊图 段子 妹子图 （这个是必须的）Updated: 这个已经被煎蛋取消了 投票 Github 地址 : https://github.com/arkilis/weapp-jandan 3. 声明 (Disclaim) 真机调试不可用，因为，煎蛋的服务器没有正确地配置SSat, 01 Apr 2017 23:04:00 GMThttps://needone.app/blog/what-is-bitcode-in-ios/https://needone.app/blog/what-is-bitcode-in-ios/You may compile and build iOS app using Swift and/or Objective-C every day, and you've probably you heard of Bitcode multiple times. So what exactly is the Bitcode , as some of youWed, 14 Oct 2020 20:25:48 GMThttps://needone.app/blog/what-is-keyword-defer-in-swift/https://needone.app/blog/what-is-keyword-defer-in-swift/The defer keyword in Swift is used to execute a block of code at the end of the current scope, regardless of how the scope is exited. The defer block is executed after any return sMon, 02 Jan 2023 22:17:53 GMThttps://needone.app/blog/which-context-should-you-use-in-android/https://needone.app/blog/which-context-should-you-use-in-android/Which Context Should You Use in Android? Context is everywhere in Android, but choosing the wrong one can lead to memory leaks, broken UI, or hard‑to‑debug crashes. This article exWed, 04 Mar 2026 21:12:50 GMThttps://needone.app/blog/wordo/https://needone.app/blog/wordo/I heard you are good at words and spelling, what about Wordo? A tiny game of finding words with few letters, share your score with your families and friends. Be the top 1. This isFri, 03 Jan 2020 05:16:46 GMThttps://needone.app/blog/workplace-project-scheme-and-target-in-ios-development/https://needone.app/blog/workplace-project-scheme-and-target-in-ios-development/Many of us have seen workspace , project , target and scheme quite often while doing the iOS development, but what are they exactly and how are they related with each other? WorkplFri, 16 Dec 2022 23:39:32 GMThttps://needone.app/blog/xcode-26-3-claude-agent-model-swapping-mcp-skills-and-adaptive-configuration/https://needone.app/blog/xcode-26-3-claude-agent-model-swapping-mcp-skills-and-adaptive-configuration/Surprisely, Xcode 26.3 now features out-of-the-box support for Claude Code/Codex. Finally, developers can elegantly leverage native AI Agents directly within the Xcode environment.Tue, 03 Mar 2026 22:09:07 GMThttps://needone.app/blog/yaml-file/https://needone.app/blog/yaml-file/YAML (YAML Ain't Markup Language) is commonly used for configuration files, but can be used in many applications where data is being stored or transmitted. A YAML file consists ofThu, 22 Dec 2022 20:27:31 GMThttps://needone.app/blog/zhong-hua-gu-shi-ci/https://needone.app/blog/zhong-hua-gu-shi-ci/中华古诗词是中华最源远流长的精神文化传承之一，好的诗词给人以精神上美的提升， 本app精选了1000首诗词歌赋： 从先秦 “知人者智，自知者明“ 到清朝 ”吹到一片秋香，清辉了如雪“ 从李白 “天生我材必有用，千金散尽还复来” 到 杜甫 ”感时花溅泪，恨别鸟惊心“ 从白居易 ”绿蚁新醅酒，红泥小火炉“ 到 王昌龄 ”但使龙城飞将在，不教胡马度阴山“ 本appTue, 30 Jun 2020 22:19:00 GMT