1 import UIKit
 2 
 3 class StandardViewController: UIViewController {
 4 
 5     //1、视图即将显示
 6     override func viewWillAppear(_ animated: Bool) {
 7         super.viewWillAppear(animated)
 8        
 9     }
10     
11     //2、UIKit将更新当前布局边距
12     @available(iOS 11.0, *)
13     override func viewLayoutMarginsDidChange() {
14         super.viewLayoutMarginsDidChange()
15         
16     }
17     
18     //3、UIKit将更新安全区域内边距
19     @available(iOS 11.0, *)
20     override func viewSafeAreaInsetsDidChange() {
21         super.viewSafeAreaInsetsDidChange()
22         
23     }
24     
25     //4、将要布局子空间
26     override func viewWillLayoutSubviews() {
27         super.viewWillLayoutSubviews()
28         
29     }
30       
31     //5、已布局子空间
32     override func viewDidLayoutSubviews() {
33         super.viewDidLayoutSubviews()
34         
35     }
36         
37     //6、视图已经出现
38     override func viewDidAppear(_ animated: Bool) {
39         super.viewDidAppear(animated)
40     }
41 
42     //7、最后即将显示视图
43     override func viewDidLoad() {
44         super.viewDidLoad()
45         // Do any additional setup after loading the view.
46         
47     }
48     
49     //8、视图即将消失
50     override func viewWillDisappear(_ animated: Bool) {
51         super.viewWillDisappear(animated)
52 
53     }
54     
55     //9、视图已消失
56     override func viewDidDisappear(_ animated: Bool) {
57         super.viewDidDisappear(animated)
58         
59     }
60     /*
61     // MARK: - Navigation
62 
63     // In a storyboard-based application, you will often want to do a little preparation before navigation
64     override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
65         // Get the new view controller using segue.destination.
66         // Pass the selected object to the new view controller.
67     }
68     */
69 }