'NSInvalidArgumentException'，原因：' - [HelloWorldLayer starGame：]：無法識別的選擇器發送到實例0x96764d0'

Question

我在helloworld圖層中有按鈕。當我點擊按鈕時，我需要更換gmaelayer場景。但是當我點擊按鈕時，我得到了錯誤。

代碼：

- (id) init 
    { 
     if ((self = [super initWithColor:ccc4(255,255,255,255)])) { 

      CGSize winSize0 = [[CCDirector sharedDirector] winSize]; 


      CCMenuItem *starMenuItem = [CCMenuItemImage 
             itemFromNormalImage:@"player.png" selectedImage:@"player.png" 
             target:self selector:@selector(starGame:)]; 

      CCMenu *starMenu = [CCMenu menuWithItems:starMenuItem,nil]; 

      starMenu.position = ccp(winSize0.width/2 , 25); 
      [starMenu alignItemsHorizontally]; 
      [self addChild:starMenu]; 
} 
    return self; 
    } 


    -(void)startGame:(id)sender{ 

     [[CCDirector sharedDirector] replaceScene:[GameLayer scene]]; 


    } 

Answer 1

您選擇的方法是錯誤的。

CCMenuItem *starMenuItem = [CCMenuItemImage 
             itemFromNormalImage:@"player.png" selectedImage:@"player.png" 
             target:self selector:@selector(starGame:)]; 

代替

CCMenuItem *starMenuItem = [CCMenuItemImage 
             itemFromNormalImage:@"player.png" selectedImage:@"player.png" 
             target:self selector:@selector(startGame:)];