Question

我正在尝试缩放YouTube视频，使其不会失真，但也会填充没有黑条的视图。我很好用带有裁剪边缘的视频来实现这一点，所以看起来MPMovieScalingModeAspectFill是我的最佳选择。此外，此视图包含在另一个视图中。

但是，我正在做的项目要求使用约束代码来配置所有UI。我不能使用nib文件或故事板。我发现很难让边缘实际裁剪（它显示视频被炸毁以适应视图的顶部和底部，水平部分溢出我的视图），我认为这可能与我的使用有关约束与使用CGRect定义实际框架。

我的具体问题包括：

是否有可能让MPMovieScalingModeAspectFill裁剪我的视频定义其受限制的用户界面？
如果可能的话，我在代码中做错了什么？

下面是我的.m文件示例，其中包含创建视频播放器视图的部分方法：

- (void) createMediaPlayer: (NSURL *)videoURL {

    YouTubeVideo *selectedVideo = [youTubeCollection.items objectAtIndex:youTubeCollection.currentItem];

    moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:selectedVideo.contentsURL]];

    [moviePlayerController setContentURL:videoURL];
    [moviePlayerController setShouldAutoplay:YES];
    [moviePlayerController setRepeatMode:MPMovieRepeatModeNone];
    [moviePlayerController setFullscreen:NO];
    [moviePlayerController setControlStyle:MPMovieControlStyleNone];
    [moviePlayerController setScalingMode:MPMovieScalingModeAspectFill];

    playingVideo = YES;

    moviePlayerController.view.translatesAutoresizingMaskIntoConstraints = NO;
    [videoPlayerView addSubview:moviePlayerController.view];
    [videoPlayerView sendSubviewToBack:videoPlayerView];


    // Configure Constraints
    [videoPlayerView addConstraint:[NSLayoutConstraint constraintWithItem:moviePlayerController.view
                                                            attribute:NSLayoutAttributeTop
                                                            relatedBy:NSLayoutRelationEqual
                                                               toItem:videoPlayerView
                                                            attribute:NSLayoutAttributeTop
                                                           multiplier:1.0
                                                             constant:0.0]];
    [videoPlayerView addConstraint:[NSLayoutConstraint constraintWithItem:moviePlayerController.view
                                                            attribute:NSLayoutAttributeBottom
                                                            relatedBy:NSLayoutRelationEqual
                                                               toItem:videoPlayerView
                                                            attribute:NSLayoutAttributeBottom
                                                           multiplier:1.0
                                                             constant:0.0]];
    [videoPlayerView addConstraint:[NSLayoutConstraint constraintWithItem:moviePlayerController.view
                                                            attribute:NSLayoutAttributeLeft
                                                            relatedBy:NSLayoutRelationEqual
                                                               toItem:videoPlayerView
                                                            attribute:NSLayoutAttributeLeft
                                                           multiplier:1.0
                                                             constant:0.0]];
    [videoPlayerView addConstraint:[NSLayoutConstraint constraintWithItem:moviePlayerController.view
                                                            attribute:NSLayoutAttributeRight
                                                            relatedBy:NSLayoutRelationEqual
                                                               toItem:videoPlayerView
                                                            attribute:NSLayoutAttributeRight
                                                           multiplier:1.0
                                                             constant:0.0]];

    [moviePlayerController prepareToPlay];

    [moviePlayerController play];
}

Answer 1

感谢您提问和回答。但以下代码实际上对我有用：

moviePlayer = [[MPMoviePlayerController alloc] init];
[moviePlayer.view setFrame: _viewPlayer.bounds];
[moviePlayer.view setAutoresizingMask:(UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight)];
[_viewPlayer addSubview:moviePlayer.view];

.
. /* set constraints */
.

[moviePlayer setScalingMode:MPMovieScalingModeAspectFill];

Answer 2

答案很简单，我需要将我的视图“clipToBounds”设置为true，同时还将setScalingMode：MPMovieScalingModeAspectFill与我的电影播放器合并：

videoPlayerView.clipsToBounds = YES;
[moviePlayerController setScalingMode:MPMovieScalingModeAspectFill];

使用MPMoviePlayerController和MP MovieScalingMode AspectFill和Constraints

2 个答案: