如何检查url是图片还是视频？

I fetchAPI 响应并解析 swift 中的选取 url。但我需要检查的是image url or video url :

如果我获得图像网址，则显示图像；如果获得视频网址，则播放视频：

 if let url = postMedia?.url{

    //need to check here 
  }

例如

这是我的视频网址：

https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4 https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4
https://clips.vorwaerts-gmbh.de/big_buck_bunny.mov https://clips.vorwaerts-gmbh.de/big_buck_bunny.mov

这是图像网址：

https://clips.vorwaerts-gmbh.de/big_buck_bunny.png https://clips.vorwaerts-gmbh.de/big_buck_bunny.png
https://clips.vorwaerts-gmbh.de/big_buck_bunny.jpg https://clips.vorwaerts-gmbh.de/big_buck_bunny.jpg

注意：我知道如何显示图像和播放视频

您可以检查如下图

let url1 : String = "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"
        let imageExtensions = ["png", "jpg", "gif"]
        //...
        // Iterate & match the URL objects from your checking results
        let url: URL? = NSURL(fileURLWithPath: url1) as URL
        let pathExtention = url?.pathExtension
            if imageExtensions.contains(pathExtention!)
            {
                print("Image URL: \(String(describing: url))")
                // Do something with it
            }else
            {
               print("Movie URL: \(String(describing: url))")
            }

同样你可以检查视频