import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.backgroundColor = #colorLiteral(red: 0.8039215803, green: 0.8039215803, blue: 0.8039215803, alpha: 1)
self.window?.makeKeyAndVisible()
self.window?.rootViewController = UIViewController()
let redView = UIView(frame: CGRect(x: 107, y: 268, width: 200, height: 200))
redView.backgroundColor = #colorLiteral(red: 0.9568627477, green: 0.6588235497, blue: 0.5450980663, alpha: 1)
redView.tag = 200
self.window?.addSubview(redView)
redView.layer.cornerRadius = 100
let yellowView = UIView(frame: CGRect(x: 132, y: 293, width: 150, height: 150))
yellowView.backgroundColor = #colorLiteral(red: 0.9764705896, green: 0.850980401, blue: 0.5490196347, alpha: 1)
yellowView.tag = 201
self.window?.addSubview(yellowView)
yellowView.layer.cornerRadius = 75
let blueView = UIView(frame: CGRect(x: 157, y: 318, width: 100, height: 100))
blueView.backgroundColor = #colorLiteral(red: 0.4745098054, green: 0.8392156959, blue: 0.9764705896, alpha: 1)
blueView.tag = 202
self.window?.addSubview(blueView)
blueView.layer.cornerRadius = 50
let pinkView = UIView(frame: CGRect(x: 182, y: 343, width: 50, height: 50))
pinkView.backgroundColor = #colorLiteral(red: 0.5568627715, green: 0.3529411852, blue: 0.9686274529, alpha: 1)
pinkView.tag = 203
self.window?.addSubview(pinkView)
pinkView.layer.cornerRadius = 25
//参数1(timeInterval):定时器执行的间隔
//参数2(target):目标对象
//参数3(selector):目标对象选择执行的方法
//参数4(userInfo):用户信息
//参数5(repeats):定时器是否重复执行
Timer.scheduledTimer(timeInterval: 0.4, target: self, selector: #selector(changeColor), userInfo: nil, repeats: true)
return true
}
func changeColor() {
let redView = self.window?.viewWithTag(200)
let color = redView?.backgroundColor
self.window?.viewWithTag(200)?.backgroundColor = self.window?.viewWithTag(201)?.backgroundColor
self.window?.viewWithTag(201)?.backgroundColor = self.window?.viewWithTag(202)?.backgroundColor
self.window?.viewWithTag(202)?.backgroundColor = self.window?.viewWithTag(203)?.backgroundColor
self.window?.viewWithTag(203)?.backgroundColor = color
}