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iOS Swift 模块练习
1、UIImageView + UIImage
import UIKit class UIImageViewViewController: UIViewController { var imageView = UIImageView() var imageChangeView = UIImageView() override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view. self.CreatUI() //创建imageView 本地 文件中 网络图片获取 self.ChangeImage() } func ChangeImage() { imageChangeView.frame = CGRect(x: 100, y: 300, width: 200, height: 200) imageChangeView.backgroundColor = UIColor.blue //设置动画 imageChangeView.animationImages = [UIImage(named:"1.jpg")!,UIImage (named:"2.jpg")!,UIImage (named:"3.jpg")!,UIImage (named:"4.jpg")!] //设置每间隔1秒 循环一次 imageChangeView.animationDuration = 4 //保持图片比例\默认 UIImageView 会拉伸图片使其占满整个 UIImageView,如果不想让图片变形,可以将 ContentMode 设置为 ToFill充满iamgeview、 AspectFit imageView内原比例。 AspectFill显示原来比例,不足的imageview扩大 imageChangeView.contentMode = .scaleToFill self.view.addSubview(imageChangeView) imageChangeView.startAnimating() } func CreatUI() { //imageview创建 imageView = UIImageView(image:UIImage(named:"1.jpg")) imageView.frame = CGRect(x: 100, y: 100, width: 200, height: 200) self.view.addSubview(imageView) //修改图片 imageView.image = UIImage(named:"2.jpg") //目录中获取图片 let path = Bundle.main.path(forResource:"3",ofType:"jpg") imageView.image = UIImage(contentsOfFile:path!) //网络下载图片 let url = URL(string: "http://hangge.com/blog/images/logo.png") let data = try! Data (contentsOf:url!)//网上获取数据流 //通过水流初始化图片 let newImage = UIImage (data:data) imageView.image = newImage } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } }
iOS Swift 模块练习
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