如何让 `-[MPMoviePlayerController backgroundView]` 立即显示？
目前我的 -[MPMoviePlayerController backgroundView] 直到电影加载足够后才会出现。因此，我放置在那里的 UIActivityIndicatorView 不会立即出现。这让我发疯。找到的唯一解决方案是将重复的指示器视图放置在背景视图和-[MPMoviePlayerController view]之间。但这看起来不正常，而且绝对是视图层次结构黑客，不能保证正常工作。如果背景视图立即显示，一切都会神奇地进行。
如何在电影加载之前立即制作背景视图？
Currently my -[MPMoviePlayerController backgroundView] does not appear until movie loaded enough. So UIActivityIndicatorView which I placed on there does not appear immediately. This drives me crazy. The only solution have been found is placing duplicated indicator-view somewhere between background-view and -[MPMoviePlayerController view]. But this does not look regular, and definitely a view hierarchy hack which is not guaranteed to work properly. If the background-view shows immediately, all will work magically.
How can I make the background-view immediately before movie loaded?
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不要使用backgroundView，而是使用moviecontroller本身的视图...
以下步骤（假设您的
MPMovieControllerPlayer实例名为moviePlayerController并且您的UIActivityIndicatorView实例称为activityIndicatorView)将您的 UIActivityIndicatorView 添加到 MPMoviePlayerController 视图之上（例如
[moviePlayerController.view addSubview:activityIndixatorView];）开始为活动指示器设置动画
注册
MPMoviePlayerLoadStateDidChangeNotification在上述通知的处理程序中，注意
moviePlayerController.loadState & MPMovieLoadStatePlayable == MPMovieLoadStatePlayable如果满足上述条件，则隐藏您的活动指示器
Do not use the backgroundView but the view of the moviecontroller itself...
Following steps (assuming your
MPMovieControllerPlayerinstance is calledmoviePlayerControllerand yourUIActivityIndicatorViewinstance is calledactivityIndicatorView)Add your UIActivityIndicatorView on top of the MPMoviePlayerController view (e.g.
[moviePlayerController.view addSubview:activityIndixatorView];)Start animating the activity indicator
Register for
MPMoviePlayerLoadStateDidChangeNotificationWithin the handler of the above notification, watch out for
moviePlayerController.loadState & MPMovieLoadStatePlayable == MPMovieLoadStatePlayableIf the above condition is matched, hide your activity indicator
我不确定是否可以显示 UIActivityIndicator在全屏模式下通过 MPMoviePlayerController？ 可能会对您有所帮助
I am not sure but Can a UIActivityIndicator be displayed over a MPMoviePlayerController in full screen mode? may help you a bit