使用undocumented API 修改MoviePlayer的播放方向

// XieWei 20100125  
- (void) showHelpVideo
{
    NSLog(@"%s %d", __FUNCTION__, __LINE__);
    
    NSString *moviePath = [[NSBundle mainBundle] pathForResource: @"iPhoneDecksDemoDevice" ofType: @"mp4" ];
    NSURL *m_videoURL = [[NSURL fileURLWithPath:moviePath] retain];
   
    MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL: m_videoURL];
    // Warning: undocumented API
    [moviePlayer setOrientation:UIDeviceOrientationLandscapeRight animated:NO];
   
    // Register to receive a notification when the movie has finished playing.
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(moviePlayBackDidFinish)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moviePlayer];
   
    [moviePlayer play];
   
}