iPhone-MPMoviePlayerController-如何以编程方式减小视频的音量 [英] iphone - MPMoviePlayerController - How can I decrease volume of the video programmatically

问题描述

我正在使用MPMoviePlayerController播放具有音频的视频.一切正常. 我隐藏了默认控件.因此，视频上没有显示任何控件. 我想在视频上放置一个滑块(我也成功在视频上放置了一个滑块).使用滑块，我想控制正在播放的视频的音量.如何控制视频的音量?

I'm using MPMoviePlayerController to play a video which has audio as well. It's working fine. I'm hiding the default controls. So no controls are showing on the video. I want to place a slider on the video (I successfully placed a slider as well over the video). With the slider, I want to control the volume of the video that is being played. How can I control volume of video?

推荐答案

请参阅MPVolumeView的文档.这是我在视图控制器中使用的示例代码.

See the documentation for MPVolumeView. Here is a sample code that I use in my view controller.

MPVolumeView *systemVolumeSlider =
    [[MPVolumeView alloc] initWithFrame: CGRectMake(10, 10, 200, 40)];
[self.view addSubview: systemVolumeSlider];
[systemVolumeSlider release];

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