客觀C開關問題

Question

我的代碼看起來像沿着這條：

-(void)touchBegan:(HWPoint *)point { 
    switch (self.states) { 
     case HWDrawState: 
      HWShape *shape = [[HWShapeManager sharedInstance] addShapeWithType:_shapeClass]; 
      break; 
     case HWSelectState: 
      break; 
     case HWDeleteState: 
      break; 
     default: 
      break; 
    } 
} 

爲什麼會出現與HWShape一個問題....？ 我得到了一個錯誤：

"error: expected expression before 'HWShape'".

這是爲什麼？非常感謝您的回覆。

Answer 1

括在括號內的定義：

case HWDrawState: 
{ 
    HWShape *shape = [[HWShapeManager sharedInstance] addShapeWithType:_shapeClass]; 
} 
break; 
case ...