可可Mac OSX應用程序關閉聲音

Question

我已經面對，女巫簡單quoestion，我沒有在谷歌，或在任何論壇中找到。如何關閉應用程序音頻/聲音？像靜音？我不想讓複選框女巫控制應用程序的聲音。

我將詳細定義感謝

Answer 1

試試這個從source code：

- (void)setDefaultAudioDevice 
{ 
    UInt32 propertySize = 0; 
    OSStatus status = noErr; 
    AudioObjectPropertyAddress propertyAOPA; 

    propertyAOPA.mElement = kAudioObjectPropertyElementMaster; 
    propertyAOPA.mScope = kAudioObjectPropertyScopeGlobal; 
    propertyAOPA.mSelector = kAudioHardwarePropertyDefaultOutputDevice; 
    propertySize = sizeof(AudioDeviceID); 

    status = AudioHardwareServiceGetPropertyData(kAudioObjectSystemObject, &propertyAOPA, 0, NULL, &propertySize, &outputDeviceID); 

    if(status) 
    { 
     // Error 
     return; 
    } 
} 

- (void)muteHardwareVolume 
{ 
    UInt32 propertySize = 0; 
    OSStatus status = noErr; 
    AudioObjectPropertyAddress propertyAOPA; 

    [self setDefaultAudioDevice]; 

    propertyAOPA.mElement = kAudioObjectPropertyElementMaster; 
    propertyAOPA.mScope = kAudioDevicePropertyScopeOutput; 

    propertyAOPA.mSelector = kAudioDevicePropertyMute; 

    propertySize = sizeof(UInt32); 
    UInt32 mute = 1; 
    status = AudioHardwareServiceSetPropertyData(outputDeviceID, &propertyAOPA, 0, NULL, propertySize, &mute); 

    if(status) 
    { 
     // Error 
     return; 
    } 
}