ios 从 AVPlayer 对象访问 URL？
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Accessing URL from AVPlayer object?
提问by Claudijo
Is there a way to access the URL from an AVPlayer object that has been initialized with a URL, as in:
有没有办法从已经用 URL 初始化的 AVPlayer 对象访问 URL，如：
NSURL *url = [NSURL URLWithString: @"http://www.example.org/audio"];
self.player = [AVPlayer playerWithURL: url];
回答by NJones
An AVPlayerplays an AVPlayerItem. AVPlayerItems are backed by objects of the class AVAsset. When you use the playerWithURL:method of AVPlayerit automatically creates the AVPlayerItembacked by an asset that is a subclass of AVAssetnamed AVURLAsset. AVURLAssethas a URLproperty.
AnAVPlayer播放AVPlayerItem. AVPlayerItems 由类的对象支持AVAsset。当您使用它的playerWithURL:方法时，AVPlayer它会自动创建AVPlayerItem由作为AVAssetnamed的子类的资产支持AVURLAsset。AVURLAsset有一个URL属性。
So, yes, in the case you provided you can get the NSURLof the currently playing item fairly easily. Here's an example function of how to do this:
所以，是的，在您提供的情况下，您可以NSURL很容易地获得当前播放的项目。这是如何执行此操作的示例函数：
-(NSURL *)urlOfCurrentlyPlayingInPlayer:(AVPlayer *)player{
// get current asset
AVAsset *currentPlayerAsset = player.currentItem.asset;
// make sure the current asset is an AVURLAsset
if (![currentPlayerAsset isKindOfClass:AVURLAsset.class]) return nil;
// return the NSURL
return [(AVURLAsset *)currentPlayerAsset URL];
}
Not a swift expert, but it seems it can be done in swift more briefly.
不是 swift 专家，但似乎可以更简短地在 swift 中完成。
func urlOfCurrentlyPlayingInPlayer(player : AVPlayer) -> URL? {
return ((player.currentItem?.asset) as? AVURLAsset)?.url
}
回答by Eric Conner
Solution for Swift 3
Swift 3 的解决方案
func getVideoUrl() -> URL? {
let asset = self.player?.currentItem?.asset
if asset == nil {
return nil
}
if let urlAsset = asset as? AVURLAsset {
return urlAsset.url
}
return nil
}
回答by eonist
Oneliner swift 4.1
Oneliner Swift 4.1
let url: URL? = (player?.currentItem?.asset as? AVURLAsset)?.url
