AVPlayer 重複播放

• 步驟1: 設置 actionAtItemEnd.
• 步驟2: 監聽 AVPlayerItemDidPlayToEndTimeNotification Notification.

_player = [AVPlayer playerWithPlayerItem:item];
_player.actionAtItemEnd = AVPlayerActionAtItemEndNone; // set this

[[NSNotificationCenter defaultCenter]addObserver:self
                                        selector:@selector(__playerItemDidPlayToEndTimeNotification:)
                                            name:AVPlayerItemDidPlayToEndTimeNotification
                                          object:nil];

- (void)__playerItemDidPlayToEndTimeNotification:(NSNotification *)sender
{
    [_player seekToTime:kCMTimeZero]; // seek to zero
}