swift

## problem The storage path is: ``` lazy var filePath:String = {         let path =  NSSe…

## 1) With the help of Alamofire * real-time * Can be used globally * Protocol-oriented …

## 1）DispatchGroup() ``` let taskQueue = DispatchQueue.global() let taskGroup = DispatchGroup(…

## 1) Problem scenario As shown in the figure below, the yellow view is the parent view, and the…

## solution ``` extension UIImage { func isEqualToImage(_ image: UIImage) -> Bool { …

## 1) Usage scenario * Mostly used for card script verification; * Support background color…

## 1) Usage scenario * Mostly used for photo display, slide left and right to show zoom effect…

## 1) Usage scenario * Mostly used for network requests to load and rotate; * Support rotat…

## description **Usage scenario**: **macOS** framework Swift language, add third-party libraries…