Question

我正在尝试在cocos2d中播放.mp4视频。请参阅下面的代码。视频无法播放，仅出现覆盖屏幕三分之一以上的黑色背景。

Instructions.m：

#import "Instructions.h"

@implementation Instructions

- (id)init
{
    self = [super init];
    if (self != nil)
    {
        [self playInstructionsVideo];
    }
    return self;
}

- (void)playInstructionsVideo
{
    NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Instructions" ofType:@"mp4"]];
    MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];

    // Register to receive a notification when the movie has finished playing.
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayBackDidFinish:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moviePlayer];

    if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)])
    {
        // Use the new 3.2 style API
        moviePlayer.controlStyle = MPMovieControlStyleNone;
        moviePlayer.shouldAutoplay = YES;
        // This does blows up in cocos2d, so we'll resize manually
        // [moviePlayer setFullscreen:YES animated:YES];
        [moviePlayer.view setTransform:CGAffineTransformMakeRotation((float)M_PI_2)];
        CGSize winSize = [[CCDirector sharedDirector] winSize];
        moviePlayer.view.frame = CGRectMake(0, 0, winSize.height, winSize.width);    // width and height are swapped after rotation
        [[[CCDirector sharedDirector] view] addSubview:moviePlayer.view];
    }
    else
    {
        // Use the old 2.0 style API
        moviePlayer.controlStyle = MPMovieControlStyleNone;
        [moviePlayer play];
    }
}

- (void)moviePlayBackDidFinish:(NSNotification *)notification
{
    MPMoviePlayerController *moviePlayer = [notification object];
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:moviePlayer];

    // If the moviePlayer.view was added to the openGL view, it needs to be removed
    if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)])
    {
        [moviePlayer.view removeFromSuperview];
    }

    [moviePlayer release];
}

@end

请帮助我，我不确定导致异常行为的原因。

Answer 1

我觉得你刚刚复制了这段代码。无论如何，屏幕截图很明显，方向更改是setTransform的结果。删除行

[moviePlayer.view setTransform:CGAffineTransformMakeRotation((float)M_PI_2)];

应该解决方向问题。

Cocos2d .mp4视频没有播放

1 个答案: