IOS:Swift-模态

AppDelegate.swift：

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: 0.2588235438, green: 0.7568627596, blue: 0.9686274529, alpha: 1)
    self.window?.makeKeyAndVisible()
    self.window?.rootViewController = FirstViewController()
   
    return true
} 

FirstViewController.swift：

class FirstViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = #colorLiteral(red: 0.9098039269, green: 0.4784313738, blue: 0.6431372762, alpha: 1)
        // Do any additional setup after loading the view.
        let presentbutton = UIButton(type: .custom)
        presentbutton.frame = CGRect(x: 100, y: 150, width: 214, height: 40)
        presentbutton.setTitle("模态视图", for: .normal)
        presentbutton.backgroundColor = UIColor.cyan
            presentbutton.setTitleColor(UIColor.gray, for: .highlighted)
        presentbutton.addTarget(self, action: #selector(presentAction), for: .touchUpInside)
        self.view.addSubview(presentbutton)
    }
//presentAction的关联方法
    func presentAction(sender:UIButton)  {
        //先要创建模态视图控制器对象
        let secondVC = SecondViewController()
        //模态出带有导航条的视图，就把这个视图加到一个导航视图控制器，但是此时要模态导航视图控制器
        let rootVC = UINavigationController(rootViewController: secondVC)
       
        //设置要出视图的动画效果
        //翻页效果
        secondVC.modalTransitionStyle = .partialCurl
       

       
        //模态视图  参数1:要模态出的视图对象 参数2；要不要动态效果 参数3:模态时要做的操作写在闭包里 nil
        self.present(rootVC, animated: true, completion: nil)
       
       
       
    } 
    //点击方法
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        let alertVC = UIAlertController(title: "警告", message: "严禁游泳", preferredStyle: .alert)
//        let alertVC = UIAlertController(title: "警告", message: "严禁游泳", preferredStyle: .actionSheet)
        self.present(alertVC, animated: true, completion: nil)
        //按钮
        let action = UIAlertAction(title: "取消", style: .cancel, handler: nil)
        //
        let photoLibrayAcyion = UIAlertAction(title: "相册", style: .destructive, handler: {(sender:UIAlertAction) in
            print("选择了相册")
            })
        let cameraAction = UIAlertAction(title: "相机 ", style: .destructive, handler: {(sender:UIAlertAction) in
            print("选择了后摄像头")
            })
       
        //添加按钮
       
        alertVC.addAction(photoLibrayAcyion)
        alertVC.addAction(cameraAction)
        //取消样式的按钮在下面显示
        alertVC.addAction(action)
    }

SecondViewController.swift 
class SecondViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = #colorLiteral(red: 0.721568644, green: 0.8862745166, blue: 0.5921568871, alpha: 1)
        // Do any additional setup after loading the view.
        //完成模态实行的效果
        let dismissbutton = UIButton(type: .custom)
        dismissbutton.frame = CGRect(x: 100, y: 150, width: 214, height: 40)
        dismissbutton.setTitleColor(UIColor.yellow, for: .normal)
        dismissbutton.setTitle("模态消失视图", for: .normal)
        dismissbutton.setTitleColor(UIColor.blue, for: .highlighted)
        dismissbutton.backgroundColor = UIColor.brown
        self.view.addSubview(dismissbutton)
        dismissbutton.addTarget(self, action: #selector(dismissAction), for: .touchUpInside)
       
    }
//MARK:-dismissAction的关联方法
    func dismissAction(sender:UIButton) {
        //让模态出来的视图消失
        self.dismiss(animated: true, completion: nil)
       
    }