I'm using Swift's Result type in this snippet. Read more about it in my post on using Result in Swift 5. Notice that in the code above the completion closure is marked as @escaping. It has to be because I use it in the data task's completion handler. This means that the completio...
In Swift 6.1 this has been resolved, but only when the newMemberImportVisibilityupcoming feature flag is enabled. This is available as a build setting in Xcode, and adjusts the import rules so that you must explicitly import modules in each file where you want their functionality. ...
What is The Protocol in Swift? A protocol acts as a tool to combine properties and methods into a single entity so that other objects can conform to this protocol to delegate tasks. We can implement the properties and functions of protocols that can be provided by a class, structure, or ...
To avoid this problem and similar ones, any time Self appeared in a protocol before Swift 5.7 the compiler would simply not allow us to use it in code such as this: let tvShow: [any Equatable] = ["Brooklyn", 99] From Swift 5.7 onwards, this code is allowed, and now the restrictions...
Swift 4.2 introduces a new Hasher struct that provides a randomly seeded, universal hash function to make this process easier: struct iPad: Hashable { var serialNumber: String var capacity: Int func hash(into hasher: inout Hasher) { hasher.combine(serialNumber) } } You can add more properties...
If you're interested in learning about Swift Concurrency'sAsyncSequence, and how it compares to publishers in Combine, I highly recommend that you start by looking atthis post. In Summary In this post you learned about a key aspect of Combine; theCancellable. I explained what theCancellablepro...
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...
Finally, the view hierarchy is presently not visible in Xcode Previews when using SwiftUI. This can make it harder to identify and fix underlying causes of UI and behavior problems in your app. UI testing in Swift Your app’s UI should function as expected, and UI testing will help you id...
What is the expected thread on which a .collect operation in Swift's Combine will emit? Specifically I am seeing this code crash in the second precondition, but not the first: return Publishers.MergeMany(publishers) .handleEvents(receiveOutput: { _ in precondition(Thread.isMainThread) /...
SWIFT code has now changed name to Business Identifier Code, BIC for short. It’s used to identify the bank among all the other banks in the world, and this helps banks transfer money and communicate with one another through secure messages.