Swift3.0－视图控制器的生命周期

亦凉 2023-10-17 10:15 48阅读 0赞

Swift3.0－视图控制器的生命周期

在ViewController.swift中

class ViewController: UIViewController {
    
        override func viewDidLoad() {
            super.viewDidLoad()
            myButton()
        }
    
        func myButton() {
            let btn = UIButton(type:UIButtonType.system) as UIButton
            btn.frame = CGRect(x:60,y:60,width:100,height:30)
            btn.backgroundColor = UIColor.lightGray
            btn.setTitle("进入下一界面", for: UIControlState.normal)
            self.view.addSubview(btn)
            
            btn.addTarget(self, action: #selector(click), for: UIControlEvents.touchUpInside)
        }
        func click(){
            let subVC = SubViewController()
            //设置切换动画效果
            subVC.modalTransitionStyle = .flipHorizontal
            //垂直切换效果
            subVC.modalTransitionStyle = .coverVertical
            subVC.modalTransitionStyle = .crossDissolve
            subVC.modalTransitionStyle = .partialCurl
            self.present(subVC, animated: true, completion: nil)
        }
        
        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
            // Dispose of any resources that can be recreated.
        }
    }

在Sub ViewController.swift中

class SubViewController: UIViewController {
    
        override func loadView() {
            super.loadView()
            print("loadView")
        }
        
        override func viewDidLoad() {
            super.viewDidLoad()
            print("viewDidLoad")
            self.view.backgroundColor = UIColor.red
            myButton()
        }
        
        func myButton() {
            let btn = UIButton(type:UIButtonType.system) as UIButton
            btn.frame = CGRect(x:60,y:60,width:100,height:30)
            btn.backgroundColor = UIColor.lightGray
            btn.setTitle("返回上一界面", for: UIControlState.normal)
            self.view.addSubview(btn)
            
            btn.addTarget(self, action: #selector(click), for: UIControlEvents.touchUpInside)
        }
        func click(){
            self.dismiss(animated: true, completion: nil)
        }
    
        override func viewWillAppear(_ animated: Bool) {
            print("viewWillAppear")
        }
        
        override func viewDidAppear(_ animated: Bool) {
            print("viewDidAppear")
        }
        
        override func viewWillDisappear(_ animated: Bool) {
            print("viewWillDisappear")
        }
        
        override func viewDidDisappear(_ animated: Bool) {
            print("viewDidDisappear")
        }
        
        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
            // Dispose of any resources that can be recreated.
        }
    }

![Center][]

[Center]: https://img-blog.csdn.net/20170203140729748?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvTWluZ2dlUWluZ2NodW4=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center