小波说雨燕 第三季 构建 swift UI 之 UI组件集－视图集（五）Image View视图 学习笔记

留下两个问题：1、后面涉及到的异常不知道原因。2、动态图片到了程序里面就不动了。















然后：





上面是有问题的，下面是没有问题的了。



代码（另外简单写的代码，纠正了那个错误）：

1 import UIKit  2
3 class ViewController: UIViewController{  4
5     @IBOutlet weak var imageView: UIImageView!
6  @IBAction func button(sender: UIButton) {  7         imageView.animationImages = [UIImage(named: "p1")!,UIImage(named: "p2")!,UIImage(named: "p3")!,UIImage(named: "p4")!,UIImage(named: "p5")!]  8         imageView.contentMode = .ScaleAspectFit  9         imageView.animationDuration = 10
10  imageView.startAnimating() 11
12  } 13     override func viewDidLoad() { 14  super.viewDidLoad() 15
16  } 17
18     override func didReceiveMemoryWarning() { 19  super.didReceiveMemoryWarning() 20  } 21 }

根据小波老师改进后的方法（如果有100张，如果一张一张添加创建对象，就不好了）：

1 import UIKit  2
3 class ViewController: UIViewController{  4
5     @IBOutlet weak var imageView: UIImageView!
6  @IBAction func button(sender: UIButton) {  7 // imageView.animationImages = [UIImage(named: "p1")!,UIImage(named: "p2")!,UIImage(named: "p3")!,UIImage(named: "p4")!,UIImage(named: "p5")!]
8         imageView.animationImages = (1...5).map{  9             UIImage(named: "p\($0)")!
10  } 11         imageView.contentMode = .ScaleAspectFit 12         imageView.animationDuration = 10
13  imageView.startAnimating() 14
15  } 16     override func viewDidLoad() { 17  super.viewDidLoad() 18
19  } 20
21     override func didReceiveMemoryWarning() { 22  super.didReceiveMemoryWarning() 23  } 24 }