MPVolumeView not showing in iOS Simulator

Question

This code works fine on a physical iPhone 6, but on iOS simulator the MPVolumeView doesn't show.

- (void)setUpVolumeView
{    
    CGRect sliderRect = CGRectMake(20, 400, 300, 20);
    self.myVolumeView = [[MPVolumeView alloc] initWithFrame:sliderRect];
    [self.view addSubview: self.myVolumeView];
}

self is in this case a ViewController.

Anyone know why this happens?

Answer 1

MPVolumeView has, as far back my memory goes, never worked in the simulator. It's always either shown nothing or displayed "No volume available" in white text.

Answer 2

它不起作用，因为它必须反映通过模拟器无法控制的系统值（即实际设备上没有音量硬件按钮）。