以横向模式观看视频

Question

我的应用程序中有一个视频，但它是纵向的。我想以横向模式显示它，但我不知道该怎么做。

我用这段代码制作了我的视频：

- (IBAction)playMovie:(id)sender
{
    NSString *filepath = [[NSBundle mainBundle] pathForResource:@"BAZO" ofType:@"m4v"];
    NSURL *fileURL = [NSURL fileURLWithPath:filepath];
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlaybackComplete:)name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayerController];

    [self.view addSubview:moviePlayerController.view];
    moviePlayerController.fullscreen = YES;
    //Uncomment om beeld formaat aan te passen
    //moviePlayerController.scalingMode = MPMovieScalingModeAspectFill;
    [moviePlayerController play];
}

- (IBAction)playSecondMovie:(id)sender
{
    NSString *filepath = [[NSBundle mainBundle] pathForResource:@"00 01. Welcome" ofType:@"mov"];
    NSURL *fileURL = [NSURL fileURLWithPath:filepath];
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlaybackComplete:)name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayerController];

    [self.view addSubview:moviePlayerController.view];
    moviePlayerController.fullscreen = YES;
    //Uncomment om beeld formaat aan te passen
    //moviePlayerController.scalingMode = MPMovieScalingModeAspectFill;
    [moviePlayerController play];
}

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

    [moviePlayerController.view removeFromSuperview];
    [moviePlayerController release];
}

-(void) tableView: (UITableView*) tableView 
didSelectRowAtIndexPath: (NSIndexPath*) indexPath
{
    NSString *filepath = [[NSBundle mainBundle] pathForResource:@"BAZO" ofType:@"m4v"];
    NSURL *fileURL = [NSURL fileURLWithPath:filepath];
    MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlaybackComplete:)name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayerController];

    [self.view addSubview:moviePlayerController.view];
    moviePlayerController.fullscreen = YES;
    //Uncomment om beeld formaat aan te passen
    //moviePlayerController.scalingMode = MPMovieScalingModeAspectFill;
    [moviePlayerController play];

    /*-(void)loadVideo:(NSString *)name ofType:(NSString *)type{
    NSURL *url=[NSURL fileURLWithPath:[mainBundle pathForResource:@"BAZO"  ofType:@"m4V"]]
    if (!mp) mp = [[MPMoviePlayerController alloc] initWithContentURL:url];
    [mp play];
    }*/
}

也许有人可以给我一个提示或方法，这样我就可以把它放到风景中？

我使用了这个代码：

[MPMoviePlayerController setOrientation:UIDeviceOrientationLandscapeLeft animated:NO];

但它给了我警告：

MPMoviePlayerController可能不会回复-setOrientation:animated:

发生了什么事？

Answer 1

也有这个问题， 我在 appDelegate 文件中运行它，这意味着我必须强制窗口更改为横向，所以如果原来是这样的：

-(void)playMovie {
    NSString *url = [[NSBundle mainBundle] 
                     pathForResource:@"intro" 
                     ofType:@"m4v"];

    MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:url]];
    [[NSNotificationCenter defaultCenter] 
     addObserver:self
     selector:@selector(movieFinishedCallback:)
     name:MPMoviePlayerPlaybackDidFinishNotification
     object:player];

    [player setFullscreen:YES animated:YES];
    [player setControlStyle:MPMovieControlStyleNone];
    [window addSubview:player.view];
    [window bringSubviewToFront:player.view];
    [player setFullscreen:YES animated:YES];
    [player setControlStyle:MPMovieControlStyleNone];

    [player play];
}

只需添加以下几行：

[window setBounds:CGRectMake(  0, 0, 480, 320)];
[window setCenter:CGPointMake(160, 240];    
[window setTransform:CGAffineTransformMakeRotation(M_PI/ 2)];

在[player play] 之前，以及在电影结束调用处，添加

struct CGRect rect = [[UIScreen mainScreen] bounds];
rect.origin.x = rect.origin.y = 0.0f;   
window =[[UIWindow alloc] initWithFrame:rect];
[window makeKeyAndVisible];

重置视图。

不确定这是否是正确的方法，但这是唯一对我有用的方法。

Answer 2

使用MPMoviePlayerViewController 而不是MPMoviePlayerController。它将处理方向、控制样式等。我提到了this answer。

MPMoviePlayerViewController *playerView = [[[MPMoviePlayerViewController alloc] initWithContentURL:videoURL] autorelease];
[self presentMoviePlayerViewControllerAnimated:playerView];

并在AppDelegate.m 中声明以下函数，该函数将在所有情况下将方向限制为纵向，并且仅在播放视频时才会更改

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if ([[self.window.rootViewController presentedViewController] isKindOfClass:[MPMoviePlayerViewController class]])
    {
        return UIInterfaceOrientationMaskAll;
    }
    else
    {
        //NSLog(@"orientation should change");
        return UIInterfaceOrientationMaskPortrait;
    }
}