霓虹灯

一周的学习即将结束，今天学习到了霓虹灯的做法，感觉很happy,分享一下制作方法

//应运程序代理类

//AppDelegate中的方法都是UIApplicationDelegate中的协议方法

//UIApplication应运程序类

class AppDelegate: UIResponder, UIApplicationDelegate {

//应用程序窗口，是AppDelegate类的属性

var window: UIWindow?

//应运程序加载完成的时候触发这个方法

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

// Override point for customization after application launch.

//想再window对象添加内容，就在这个方法中实现

//UIScreen屏幕类

//UIScreen.main获取屏幕对象

//UIScreen.main.bounds获取屏幕大小

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

self.window?.backgroundColor = #colorLiteral(red: 1, green: 1, blue: 1, alpha: 1)

//让window成为应用程序的主窗口，并使其可见

self.window?.makeKeyAndVisible()

//给window设置根视图控制器

self.window?.rootViewController = UIViewController()

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

redView.backgroundColor = #colorLiteral(red: 0.8537434687, green: 0.7977634797, blue: 0.9764705896, 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: 0.8976129821, green: 0.6902934195, blue: 0.9686274529, 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: 0.8227517346, green: 0.5248843816, blue: 0.9098039269, alpha: 1)

blueView.tag = 202

self.window?.addSubview(blueView)

blueView.layer.cornerRadius = 50

//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4:用户信息 nil

//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

}

//MAPK:一定时器的目标对象执行方法

func changeColor()  {

//print("定时器方法")

let redView = self.window?.viewWithTag(200)

//存储redView背景颜色

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 = color

}