ios - MPVolumeView 仅适用于 iPod

Question

我在我的项目中添加了这样的 MPVolumeview

这是我用于 iPad 的代码。

-(void) 添加音量控制{

volumeView = [[MPVolumeView alloc] initWithFrame: CGRectMake(780, 33, 150, 40)];


NSArray *tempArray = volumeView.subviews;

for (id current in tempArray)
{
    if ([current isKindOfClass:[UISlider class]])
    {
        UISlider *tempSlider = (UISlider *) current;
        [tempSlider setMaximumTrackTintColor:[UIColor clearColor]];

        CGRect rRect = tempSlider.frame;
        rRect.origin.x = rRect.origin.x + 20;
        tempSlider.frame = rRect;

        UIImage *pMaxTrackImage;
        UIImage *pMinTrackImage;
        UIImage *pThumbImage;

        pMaxTrackImage = [[UIImage imageNamed:@"pgbar_sound_fill_ipad"]resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];
        pMinTrackImage = [[UIImage imageNamed:@"pgbar_sound_bg_ipad"]resizableImageWithCapInsets:UIEdgeInsetsMake(0, 6, 0, 6)];
        pThumbImage    = [UIImage imageNamed:@"pgbar_sound_thumb_ipad"];

        [tempSlider setMaximumTrackImage:pMaxTrackImage forState:UIControlStateNormal];
        [tempSlider setMinimumTrackImage:pMinTrackImage forState:UIControlStateNormal];
        [tempSlider setThumbImage:pThumbImage forState:UIControlStateNormal];
    }
}

volumeView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin;

[self._bottomBar addSubview:volumeView];

在 iPod 中运行应用程序时音量正常，但在 iPhone 和 iPad 中不起作用。

我测试的设备是iPod5和iPhone5C。我测试的操作系统是 iOS6 和 iOS7。

我已经尝试了几乎所有可用的帮助，但没有一个对我有用。请提供一些建议/指导。

谢谢，

尼基尔.T

Answer 1

您需要设置这些值setMinimumTrackImage、setMaximumTrackImage、setThumbImage

for (UIView *sv in [volumeSlider subviews])
{
    if ([sv isKindOfClass:[UISlider class]])
    {
        UISlider *slider = (UISlider*) sv;
        [slider setMinimumTrackImage:yourImage forState:UIControlStateNormal];
        [slider setMaximumTrackImage:yourImage forState:UIControlStateNormal];
        [slider setThumbImage:yourImage forState:UIControlStateNormal];
    }
}