This articles presents all the formatted string in JS, Python, Swift and Objective-C. JavaScript Example: variable a can be any type using “ instead of “” or ”. “ can be also used for multiline, see following example // template string let a = 100; let b = `${a}`; // multiple lines let a =
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Have done development on iOS for a couple of years, here is what I understand on Objective-C, presented in Mind map.
In this short article you will know: Selector in Objc Selector in Swift Passing value using Selector Selector in Objc: Selector is a concept of Objective-C Runtime, which allows to turn a method’s name (NSString) into a SEL type. Basically you cand find @selectoreverywhere, such as adding a method to a view, NSNotification, etc. [gist
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Objective-C is a dynamic language. With Runtime, objects can be represented through struct in C, and methods can be done via c language function. Runtime is written in assembly and c. With the benefits of Runtime, we have another way to call class and instance methods. The following example shows how to use Runtime to
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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 instance automatically; This instance must be provided to other objects. Benefits of Singleton: All objects can only have one instance. In other words, all the
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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 it provides a way for objects to get notified when the properties of other objects are changed. How does it work To illustrate how does the KVO, I think there is
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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 chain method looks like: Method Chaining is simple but powerful, which has three key points, everyone can create his/her own chaining method after knowing this: To
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The following are some frequently used iOS TableView tips while developing: Change the tableview background color: Sometimes you probably need to change the whole table view background. self.tableView.backgroundColor = colorTableview; Reload the data in Table view: After update the table data array/dictionary, you probably want to manually reload the whole table. [self.fileSelectionTableView reloadData]; Remove blank
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Category in Objective-C, Extension in Swift are the same concept. They can help you to organise your class code. With category and extension, you don’t have to create a inherited class. Extension in Swift Step 1: Create a Swift file Then in the Swift file: [gist https://gist.github.com/arkilis/fa6abfc9eb66ed5527fc3ea5bb70ffa3 /] Step 2: Use extension: [gist https://gist.github.com/arkilis/5a622dcf50d68d656d8d58965ff7d5ca /]
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Before this, let me ask you what is the running order of viewWillAppear, viewDidAppear, viewDidLoad, viewWillDisappear and viewDidDisappear? If you know the answer, please close this webpage and contine your game. 🙂 So a simple piece code is written to verify this: Example code: // // ViewController.m // TestBlock // // Created by Ben Liu
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