第六天:SwiftPopUPAndFadeOut

 1 import UIKit
 2 
 3 // 先写两个屏幕宽高的宏定义
 4 let kScreenWidth = UIScreen.main.bounds.size.width
 5 let kScreenHeight = UIScreen.main.bounds.size.height
 6 
 7 class ViewController: UIViewController {
 8 
 9     // 定义三个属性
10     // 背景View
11     // 弹出View
12     // 弹出View 的 Label
13     var bkgView: UIView!
14     var popView: UIView!
15     var popLabel: UILabel!
16     
17     override func viewDidLoad() {
18         super.viewDidLoad()
19         // Do any additional setup after loading the view, typically from a nib.
20         setupUI()
21     }
22     
23     
24     // 配置 UI 方法 func setupUI() { }
25     func setupUI() {
26         // self.view 的颜色
27         self.view.backgroundColor = UIColor.cyan
28         
29         // 创建 弹出 Button
30         let popBtn = UIButton()
31         popBtn.frame.size = CGSize(width: 100.0, height: 100.0)
32         popBtn.center = self.view.center
33         popBtn.layer.cornerRadius = 50.0
34         popBtn.backgroundColor = UIColor.green
35         popBtn.setTitle("PopUP", for: .normal)
36         
37         popBtn.addTarget(self, action: #selector(popUpAction), for: .touchUpInside)
38         
39         self.view.addSubview(popBtn)
40     }
41     
42     override func didReceiveMemoryWarning() {
43         super.didReceiveMemoryWarning()
44         // Dispose of any resources that can be recreated.
45     }
46 }
47 
48 // 延展
49 extension ViewController {
50     @objc func popUpAction() {
51         
52         guard let windows = UIApplication.shared.keyWindow else {
53             return
54         }
55         
56         bkgView = UIView()
57         bkgView.frame = windows.bounds
58         bkgView.backgroundColor = UIColor (white: 0.3, alpha: 0.6)
59         windows.addSubview(bkgView)
60         
61         popView = UIView()
62         popView.frame = CGRect(x: 30.0, y: kScreenHeight, width: kScreenWidth - 60.0, height: 30.0)
63         popView.backgroundColor = UIColor.orange
64         popView.layer.cornerRadius = 15.0
65         windows.addSubview(popView)
66         
67         UIView.animate(withDuration: 0.3) {
68             self.popView.frame = CGRect(x: 30.0, y: (kScreenHeight - 30) / 2.0, width: kScreenWidth - 60.0, height: 30.0)
69         }
70         
71         let tapGesture = UITapGestureRecognizer(target: self, action: #selector(hideView))
72         bkgView.addGestureRecognizer(tapGesture)
73     }
74     
75     @objc func hideView() {
76         UIView.animate(withDuration: 0.3) {
77             self.popView.frame = CGRect(x: 30.0, y: kScreenHeight, width: kScreenWidth - 60.0, height: 30.0)
78             
79             DispatchQueue.main.asyncAfter(deadline: .now() + 0.3, execute: {
80                 self.popView.removeFromSuperview()
81                 self.bkgView.removeFromSuperview()
82             })
83         }
84     }
85     
86 }