iphone - 在cocos2d中平滑拖动Sprite - iPhone

Question

我已经实现了对 Sprite 对象的拖动，如下所示..

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

UITouch * touch = [touches anyObject];
CGPoint location = [[Director sharedDirector] convertCoordinate: [touch locationInView:touch.view]];    
[diskSprite setPosition:ccp(location.x , location.y )];
return kEventHandled;
}

但是这个拖拽并不顺利......当我用拇指快速拖动对象时，该对象会从路径中离开。

谢谢

Answer 1

可能有点晚了，但我正在寻找类似的东西。我发现这个很棒的教程解释了一切: http://www.raywenderlich.com/2343/how-to-drag-and-drop-sprites-with-cocos2d

- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event {       
    CGPoint touchLocation = [self convertTouchToNodeSpace:touch];

    CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
    oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
    oldTouchLocation = [self convertToNodeSpace:oldTouchLocation];

    CGPoint translation = ccpSub(touchLocation, oldTouchLocation);    
    CGPoint newPos = ccpAdd(mySpriteToMove.position, translation);
    mySpriteToMove.position = newPos;
}