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import UIKit @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate {...
import UIKit@UIApplicationMainclass AppDelegate: UIResponder, UIApplicationDelegate { ...
//應(yīng)用程序代理類 //AppDelegate中的方法都是UIApplicationDelegatez的協(xié)議方法 //應(yīng)用程序類 class AppDelegate: UIR...
self.window = UIWindow(frame:UIScreen.main.bounds) self.window?.backgroundColor = UICol...