iOS画外音状态

Question

我正在尝试为已经开发的iOS应用添加辅助功能.

如果iPhone设置的辅助功能菜单中的VoiceOver选项打开,并且如果画外音关闭则不显示,我希望它们显示一些UI功能(例如按钮).

有没有办法检查画外音选项是否打开？

Answer 1

BOOL UIAccessibilityIsVoiceOverRunning();

Answer 2

在ViewDIdLoad中

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(voiceOverStatusChanged)
                                             name:UIAccessibilityVoiceOverStatusChanged
                                           object:nil];


- (void)voiceOverStatusChanged
{
    if(!UIAccessibilityIsVoiceOverRunning())
    {
        //do your changes
    }
}

Answer 3

对于Swift 4.2，您可以检查UIKit提供的以下布尔值：

UIAccessibility.isVoiceOverRunning