swift 实践- 09 -- UIImageVIew

import UIKit

 

class ViewController: UIViewController {

 

    override func viewDidLoad() {

        super.viewDidLoad()

        

        let imageView = UIImageView.init(image: UIImage.init(named: "1"))

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

        self.view.addSubview(imageView)

        

        

        // 从文件目录中获取图片

        /*

         

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

        let newImage = UIImage(contentsOfFile: imagePath!)

        let newImageView = UIImageView(image:newImage)

        self.view.addSubview(newImageView)

         

        */

        

        

        // 从网络地址获取图片

        //定义URL对象

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

        //从网络获取数据流

        if let data = try? Data(contentsOf: url!) {

            //通过数据流初始化图片

            let newImage = UIImage(data: data)

            let imageView2 = UIImageView(image:newImage);

            imageView2.frame = CGRect.init(x: 10, y: 200, width: 300, height: 150)

            self.view.addSubview(imageView2)

        }else{

            print("无法获取图片!")

        }

        

       

        // 保持图片比例

        imageView.contentMode = .scaleAspectFit

    }

 

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

 

 

}

转载于:https://www.cnblogs.com/dingzhijie/p/6972679.html