CCSprite旋轉像Cocos2D中的汽車轉向

Question

有沒有什麼辦法可以讓CCSprite像汽車轉向一樣？如果我用CCSprite釋放我的觸摸，它應該像轉向一樣順利地自動返回到原來的位置！進出口使用下面的代碼，

-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
    { 

     UITouch *touch=[touches anyObject]; 
     //acquire the previous touch location 
     CGPoint firstLocation = [touch previousLocationInView:[touch view]]; 
     location = [touch locationInView:[touch view]]; 


     CGPoint touchingPoint = [[CCDirector sharedDirector] convertToGL:location]; 
     CGPoint firstTouchingPoint = [[CCDirector sharedDirector] convertToGL:firstLocation]; 

     CGPoint firstVector = ccpSub(firstTouchingPoint, Steering.position); 
     CGFloat firstRotateAngle = -ccpToAngle(firstVector); 
     CGFloat previousTouch = CC_RADIANS_TO_DEGREES(firstRotateAngle); 

     CGPoint vector = ccpSub(touchingPoint, Steering.position); 
     CGFloat rotateAngle = -ccpToAngle(vector); 
     CGFloat currentTouch = CC_RADIANS_TO_DEGREES(rotateAngle); 
     dialrotation+=currentTouch-PreviousTouch; 
     sprite.rotation=dialrotation; 
     } 

這種平穩轉動我的CCSprite，但我不知道如何要返回到它像汽車Steering.Is有原來的位置任何方式在cocos2d這樣做呢？

Answer 1

在ccTouchesBegan方法存儲在某處的sprite.rotation的值，在ccTouchesEnded運行CCRotateTo使用此存儲的值對您的精靈的操作。