iphone - 如何将KVO添加到MPMoviePlayer currentPlaybackTime？

如何将KVO添加到MPMoviePlayer类的currentPlaybackTime属性？

最佳答案

您不能将KVO添加到currentPlaybackTime中，因为该属性未明确声明为与KVO兼容。

相反，您可以尝试定期轮询玩家并使用以下代码存储位置:

- (void) BeginPlayerPolling {
self.pollPlayerTimer = [NSTimer scheduledTimerWithTimeInterval:5
                                                       target:self
                                                     selector:@selector(PollPlayerTimer_tick:)
                                                     userInfo:nil
                                                      repeats:YES];

}

- (void) PollPlayerTimer_tick:(NSObject *)sender {
// Store current playback position
if (player.playbackState == MPMoviePlaybackStatePlaying)
    lastRecordedPlaybackTime = player.currentPlaybackTime;
}

- (void) EndPlayerPolling {
if (pollPlayerTimer != nil)
{
    [pollPlayerTimer invalidate];
    self.pollPlayerTimer = nil;
}
}