在使用Array/String时,可以使用Slice切片获取一部分数据。Slice保存对原始Array/String的引用共享内存数据,不需要重新分配空间进行存储。 let midpoint = absences.count / 2 let firstHalf = absences[.. ` 提示:应避免一直持有 Slice,Slice 会延长原始 Array/String 的生命周期导致无法被释放造成内存泄漏。 protocol...
let vectorToAdd = Vector2D(x: 3.0, y: 4.0) original += vectorToAdd // original now has values of (4.0, 6.0) 注意 It isn’t possible to overload the default assignment operator (=). Only the compound assignment operators can be overloaded. Similarly, the ternary conditional operator (a...
但是,因为它使用了withThrowingTaskGroup(),所以有一个问题:每次调用addTask()时都会创建一个新的子任务,但因为它不在任何地方调用group.next(),所以这些子任务永远不会被销毁。这段代码将一点一点地(每次可能只有几百个字节)吃掉越来越多的内存,直到最终操作系统的 RAM 耗尽,被迫终止程序。 使用丢弃任务组可以完全...
(void)adsy_drawvodAdSuccessToLoad:(ADSuyiSDKDrawvodAd *)drawvodAd drawvodAdArray:(NSArray<ADSuyiAdapterDrawvodAdView *> *)drawvodAdViewArray { for (ADSuyiAdapterDrawvodAdView *adView in drawvodAdViewArray) { ADSuyiSDKExtInfo *extInfo = [adView adsy_extInfo]; NSLog(@"ecpm=%@, ecpmType=...
// Set the body to the image in byte array format. request.httpBody = pngImage request.httpMethod = "POST" let task = URLSession.shared.dataTask(with: request) { data, response, error in guard let data = data, let response = response as? HTTPURLResponse, // Check for ne...
// Swift 3funcfoo(x:NSArray) {// Result of subscript is now Any, needs to be coerced to get method lookupprint((x[0]asAnyObject).description) } Alternatively, force-cast the value to the concrete object type you expect: funcfoo(x:NSArray) {// Cast to the concrete object type you...
=0view.addSubview(titleText) bodyText =UILabel() bodyText.text ="Capture or upload a photo of handprinted text on a piece of paper, handwriting, typed text, text on a computer screen, writing on a white board and many more, and watch it be presented to you in the Immersiv...
A handy collection of more than 500 native Swift extensions to boost your productivity. - SwifterSwift/SwifterSwift
For example, the package includes a group of "chunking" methods, each of which breaks a collection into consecutive subsequences. One version tests adjacent elements to find the breaking point between chunks — you can use it to quickly separate an array into ascending runs: ...
Progress.swift 🐧 - Add beautiful progress bars to your command line. Swift Argument Parser - Straightforward, type-safe argument parsing for Swift. SwiftCLI 🐧 - A powerful framework that can be used to develop a CLI. Swiftline - A set of tools to help you create command line applicati...