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）：

import UIKit

class ViewController: UIViewController{
    
    @IBOutlet weak var imageView: UIImageView!
    @IBAction func button(sender: UIButton) {
        imageView.animationImages = [UIImage(named: "p1")!,UIImage(named: "p2")!,UIImage(named: "p3")!,UIImage(named: "p4")!,UIImage(named: "p5")!]
        imageView.contentMode = .ScaleAspectFit
        imageView.animationDuration = 10
        imageView.startAnimating()
        
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

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）：

import UIKit

class ViewController: UIViewController{
    
    @IBOutlet weak var imageView: UIImageView!
    @IBAction func button(sender: UIButton) {
//        imageView.animationImages = [UIImage(named: "p1")!,UIImage(named: "p2")!,UIImage(named: "p3")!,UIImage(named: "p4")!,UIImage(named: "p5")!]
        imageView.animationImages = (1...5).map{
            UIImage(named: "p($0)")!
        }
        imageView.contentMode = .ScaleAspectFit
        imageView.animationDuration = 10
        imageView.startAnimating()
        
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}