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

电影播放效果不错，但播放前会有快速黑色闪光。这是将控制风格设置为MPMovieControlStyleNone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

显然电影中有黑色闪光直到足够的电影加载，所以它可以开始播放。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。这样你可以将alpha设置为0.

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

一旦你打电话给[播放器];要播放视频，请设置.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.

这将使玩家隐藏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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