切換開關以關閉應用程序聲音

Question

我在應用程序中有多個聲音。我想在設置中設置切換開關以關閉這些聲音。這是執行聲音的代碼。

- (void) soundEventDidHappen:(NSString*)eventName { 
//check dictionary of sounds.. if there is a corresponding sound for this event name, play it 

if ([[soundIDForEventString allKeys] containsObject:eventName]) { 
    AudioServicesPlaySystemSound ([[soundIDForEventString objectForKey:eventName] intValue]); 
} 

Answer 1

你可以做一個簡單的切換是這樣的：

bool isToggled; 

- (IBAction) toggleSound{ 
    if(isToggled){ 
     isToggled = NO; //sets isToggled to false if it's already true 
    } 
    else{ 
     isToggled = YES; //sets isToggled to true if it's already false 
    } 
} 

，然後你可能只是這樣做：

- (void) soundEventDidHappen:(NSString*)eventName { 
    //check dictionary of sounds.. if there is a corresponding sound for this event name, play  it 
    if(isToggled){ 

     if ([[soundIDForEventString allKeys] containsObject:eventName]) { 
     AudioServicesPlaySystemSound ([[soundIDForEventString objectForKey:eventName] intValue]); 
     } 
    } 
} 

用來播放聲音，如果isToggled是真實的。在viewDidLoad方法

[[NSUserDefaults standardUserDefaults] setBool:isToggled forKey:@"soundEnabled"]; 
[[NSUserDefaults standardUserDefaults] synchronize]; 

//use this to save 

然後，你可以用這個來獲取值（最有可能的地方：然後你可以使用NSUserDefaults如果你想保存布爾對未來

isToggled = [[NSUserDefaults standardUserDefaults] boolForKey:@"soundEnabled"]; 
[[NSUserDefaults standardUserDefaults] synchronize];