霓虹灯的代码

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霓虹灯的代码

self.window = UIWindow(frame: UIScreen.main.bounds)

self.window?.backgroundColor = UIColor.white

self.window?.makeKeyAndVisible()

self.window?.rootViewController = UIViewController()

let redView = UIView(frame: CGRect(x: 107, y: 268, width: 200, height: 200))

redView.backgroundColor = UIColor.cyan

redView.tag = 200

self.window?.addSubview(redView)

redView.layer.cornerRadius = 100

let yelloeView = UIView(frame: CGRect(x: 132, y: 293, width: 150, height: 150))

yelloeView.backgroundColor = #colorLiteral(red: 1, green: 0.7380076051, blue: 0.8207985759, alpha: 1)

yelloeView.tag = 201

self.window?.addSubview(yelloeView)

yelloeView.layer.cornerRadius = 75

let blueView = UIView(frame: CGRect(x: 157, y: 318, width: 100, height: 100))

blueView.backgroundColor = #colorLiteral(red: 0.721568644, green: 0.8862745166, blue: 0.5921568871, alpha: 1)

blueView.tag = 202

self.window?.addSubview(blueView)

blueView.layer.cornerRadius = 50

let brownView = UIView(frame: CGRect(x: 182, y: 343, width: 50, height: 50))

brownView.backgroundColor = #colorLiteral(red: 0.9764705896, green: 0.850980401, blue: 0.5490196347, alpha: 1)

brownView.tag = 203

self.window?.addSubview(brownView)

brownView.layer.cornerRadius = 25

//定时器： 参数1:定时执行的间隔  参数2:目标对象  参数3:目标对象选择执行的方法  参数四：用户信息  参数5：定时器是否重复执行

Timer.scheduledTimer(timeInterval: 0.3, 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

}