在Mac上檢測空格鍵事件？

Question

我搜索了整個互聯網上的東西沒有運氣。我試圖檢測用戶是否在Mac應用上點擊空格鍵。

-(void)keyDown:(NSEvent*)theEvent;當用戶按下字符鍵，但沒有輸入或空格時效果很好。

-(BOOL)performKeyEquivalent:(NSEvent *)theEvent;當用戶點擊回車鍵或方向鍵而不是空格鍵時被調用。

任何想法？

Answer 1

能得到它的工作通過繼承NSWindow和實施此方法：

- (void)sendEvent:(NSEvent *)theEvent 
{ 
    NSString* keysPressed = [theEvent characters]; 
    if ([keysPressed isEqualToString:@" "]) 
    { 
     if(theEvent.type==NSKeyDown) 
      NSLog(@"spaceDown"); 
     if(theEvent.type==NSKeyUp) 
      NSLog(@"spaceUp"); 
    } 
} 

Answer 2

您可以根據空格鍵常量使用其他循環與鍵號碼32。

if ([theArrow length] == 1) 
    { 
     keyChar = [theArrow characterAtIndex:0]; 
     NSLog(@"Dentro2 %hu", keyChar); 
     switch (keyChar) 
     { 
      case 32: // Space Bar management 

       break;    
     } 
    } 

    // Manage when any key is dropped. 
    if(downOrUp == FALSE) 
    { 
     NSLog(@"Tecla soltada."); 
     self.playerVelocity = CGPointMake(0.0, 0.0); 
    } 

// Methods to handle key push and key drop 
    - (void)keyDown:(NSEvent *)event 
    { 
     [self handleKeyEvent:event keyDown:YES]; 
    } 

    - (void)keyUp:(NSEvent *)event 
    { 
     [self handleKeyEvent:event keyDown:NO]; 
    } 

Answer 3

我不由自主地絆了一下。奇怪的是，keyDown:事件僅通過moby所述的方法檢測到。但是keyUp:作品像空格鍵按下一個魅力

Answer 4

嘗試幾個解決方案後，我帶着一個din't打破其他東西對我來說

@import Carbon; 

typedef void (^CustomWindowSpacebarKeyCallback)(NSEventType eventType); 

@interface CustomWindow : NSWindow 

@property (nonatomic, copy) CustomWindowSpacebarKeyCallback spacebarKeyCallback; 

@end 

@implementation CustomWindow 

- (void) sendEvent:(NSEvent *)theEvent 
{ 
    [super sendEvent:theEvent]; 

    if (([theEvent type] == NSKeyDown || [theEvent type] == NSKeyUp) && _spacebarKeyCallback) { 
     NSString *keysPressed = [theEvent characters]; 
     if ([keysPressed length] == 1) { 
      unichar keyChar = [keysPressed characterAtIndex:0]; 
      if (keyChar == kSpaceCharCode) { 
       _spacebarKeyCallback([theEvent type]); 
      } 
     } 
    } 
} 

@end