AVURLAsset loadValuesAsynchronouslyForKeys，同步版本？
有没有办法以同步方式加载 AVURLAsset？ 我的场景是，我需要在后台加载资源，同时显示不同的视图，并在资源准备好播放时更改为显示 AVPlayer 的视图。以前没有。
我尝试加载异步并调用委托方法来告诉“资产已准备好，您可以显示下一个视图”，但是如果我在此之前收到内存警告，则包含后台资产的视图会在完成之前被释放正在加载...所以我从来没有接到代表的电话。这就是为什么我宁愿同步进行。
有什么想法吗？
is there a way to load an AVURLAsset in a synchronous manner?
My scenario is one which I need to load the assets in the background while showing a different view and change to the view showing the AVPlayer when the assets are ready to play. Not before.
I've tried loading async and calling a delegate method to tell "the assets are ready, you can show the next view", but if I get a mem warning before that, the views containing the assets in the background get released before they finish loading...so i never get the delegate call. That's why I rather do it synchronously.
Any ideas?
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我不是 100% 确定我理解您的意思，但我相信您应该能够使用
[AVURLAsset commonMetadata]或[AVURLAssetmetadataForFormat:[[AVURLAsset availableMetadataFormats] lastObject]]，然后在加载此信息后显示您的视图。这些方法返回一个 AVMetadataItem 数组，您应该能够轻松地使用 for 循环遍历该数组。很抱歉，如果这不是您要找的。I'm not 100% sure I understand what you're getting at, but I believe you should be able to just use
[AVURLAsset commonMetadata]or[AVURLAsset metadataForFormat:[[AVURLAsset availableMetadataFormats] lastObject]]and then show your view once this information has been loaded. Theses methods return an array ofAVMetadataItems, which you should rather easily be able to traverse with a for loop. Sorry if this wasn't what you were looking for.