小编Kaj*_*ala的帖子

我有一个UIToolBar,旨在包含用于控制音量和亮度的滑块.我为音量使用MPVolumeView滑块,为亮度使用普通的UISlider.虽然滑块本身工作正常,但它们的垂直位置不匹配:

如何让它们处于同一高度？

我的代码:

- (void) createToolbar{

toolBar = [[UIToolbar alloc] init];
toolBar.frame = CGRectMake(0, 0, self.view.frame.size.width, 44);

UISegmentedControl *modeSelector = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Play", @"Rec", nil]];
[modeSelector setSegmentedControlStyle:UISegmentedControlStyleBar];
[modeSelector addTarget:self action:@selector(changePlayMode) forControlEvents:UIControlEventValueChanged];
modeSelector.selectedSegmentIndex = 0;
UIBarButtonItem *modeSelectorAsToolbarItem = [[UIBarButtonItem alloc] initWithCustomView:modeSelector];

brightnessSlider = [[UISlider alloc] initWithFrame:CGRectMake(0, 0, 150, 30)];
brightnessSlider.minimumValue = 0;
brightnessSlider.maximumValue = 1;
brightnessSlider.value = [[UIScreen mainScreen] brightness];
brightnessSlider.continuous = YES;
[brightnessSlider addTarget:self action:@selector(adjustBrightness:) forControlEvents:UIControlEventValueChanged];
UIBarButtonItem *brightSliderAsToolbarItem = [[UIBarButtonItem alloc] initWithCustomView:brightnessSlider];

MPVolumeView *volView = [[MPVolumeView alloc] initWithFrame:CGRectMake(0, 0, …