MPMoviePlayerController 在视频开始时导致黑色闪烁 [英] MPMoviePlayerController causes flash of black at start of video

问题描述

电影播放正常，但在播放前有一个快速的黑色闪光.这是将 controlstyle 设置为 MPMovieControlStyleNone 导致的怪癖吗?

The movie plays just fine but there is a quick black flash right before it plays. Is this a quirk resulting from setting the controlstyle to MPMovieControlStyleNone?

NSString *url = [[NSBundle mainBundle] pathForResource:@"00" ofType:@"mov"];
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] 
    initWithContentURL:[NSURL fileURLWithPath:url]];

[[NSNotificationCenter defaultCenter]
    addObserver:self
    selector:@selector(movieFinishedCallback:)
    name:MPMoviePlayerPlaybackDidFinishNotification
    object:player];

//---play video in implicit size---
player.view.frame = CGRectMake(80, 64, 163, 246);
[self.view addSubview:player.view];

// Hide video controls
player.controlStyle =  MPMovieControlStyleNone;

//---play movie---
[player play];

推荐答案

很明显，在加载足够多的电影以开始播放之前，电影 rect 中会出现黑色闪光.这是我的解决方法:

Evidently there is a flash of black in the movie rect until enough movie loads so it can start playback. Here is my workaround:

1. 创建一个 UIImageView 并将 MPMoviePlayerController 放入其中.这样您就可以将 alpha 设置为 0.

1. Create a UIImageView and put the MPMoviePlayerController in it. That way you can set the alpha to 0.

只要你调用[player play]；要播放视频，请设置 0.5 秒计时器.

As soon as you call [player play]; to play the video, set up a .5 second timer.

时间结束后，将 alpha 更改为 1.

When the time is done, change the alpha to 1.

这将使玩家隐形 1/2 秒(隐藏黑色闪光).

This will make the player invisible for 1/2 second (which hides the black flash).

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