A common use-case is to derive value from other properties. In the following example, we’re creating a filename based on the name and file extension: structContent{varname:StringletfileExtension:String// A computed property to generate a filename.varfilename:String{returnname+"."+fileExtension...
For example, SE-0401 removes a feature that was introduced back in Swift 5.5: actor inference for property wrappers. Previously, any struct or class using a property wrapper with @MainActor for its wrapped value will automatically be @MainActor. This is what makes @StateObject and @Observed...
As of Swift 3, the Swift standard library defines the AnyHashable supertype. This means that types conforming to the Hashable protocol can be used as AnyHashable. In the Swift standard library, AnyHashable is defined as a struct. public struct AnyHashable { public init<H>(_ base: H) where ...
Using the ImageDownloader class, we will define a protocol to notify conformed objects when a task is completed or failed. This protocol will have a set of rules (or functions). A class, struct, or enum can conform to the protocol and complete the implementation of these functions. In this...
body: "What is property Wrapper in Swift")Under the hood, you get an initializer that took advantage of the newly created init(wrappedValue: String).struct BlogTeaser { var title: String @Truncate var body: String // implicit memberwise initializer: init(title: String, body: String) { self...
Swift If you have spent some time with SwiftUI or if you have watched the WWDC videos on SwiftUI this year, you may have noticed that views in SwiftUI have a property called body of type some View. The some keyword is new in Swift 5.1 and it’s part of a feature called opaque result...
Although Swift 6 is looming on the horizon, the 5.x releases still have a lot to give – simpler ways to use if and switch, macros, noncopyable types, custom actor executors, and more are all coming in Swift 5.9, making yet another mammoth release. In this article I’ll walk you ...
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Swift 5.2 is now available as part of Xcode 11.4. In this article, you’ll get an overview of the changes you’ll see moving to Swift 5.2.
New in Swift 1.1countElements() is now count() In Swift 1.0 you would count an array like this: let items = [1, 2, 3] println(countElements(items)) The countElements() function has been renamed to count() in Swift 1.1, so the new code is this: let items = [1, 2, 3] ...