Swift—UIImageView

一、本地图片

//声明一个imageView，初始化图片

let imageView =UIImageView(image:UIImage(named:"image1"))

//设置尺寸大小

imageView.frame =CGRect(x:10, y:30, width:300, height:150)

//添加到view上

self.view.addSubview(imageView)

//防止拉抻，自动适应

imageView.contentMode = .scaleAspectFit

二、网络图片

let url =URL(string:"http://hangge.com/blog/images/logo.png")

//从网络获取数据流

let data = try!Data(contentsOf: url!)

//通过数据流初始化图片

let newImage =UIImage(data: data)

let imageView =UIImageView(image:newImage);

self.view.addSubview(imageView)

三、从文件目录中获取图片

let path =Bundle.main.path(forResource:"ball", ofType:"png")

let newImage =UIImage(contentsOfFile: path!)

let imageView =UIImageView(image:newImage)

self.view.addSubview(imageView)

四、使用图像控件实现动画播放

var imageView:UIImageView!

imageView =UIImageView()

imageView.frame=CGRect(x:20, y:20, width:100, height:100)

//设置动画图片

imageView.animationImages = [UIImage(named:"icon1")!,UIImage(named:"icon2")!]

//设置每隔0.5秒变化一次

imageView.animationDuration=0.5

self.view.addSubview(imageView)

//开始动画

imageView.startAnimating()

//结束动画

imageView.stopAnimating()