本文介绍了在 cocos2d 中平滑拖动一个 Sprite - iPhone的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
我已经在精灵对象上实现了如下拖动..
I have implemented a drag on a sprite object as follows..
-(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;
}
但是这种拖动并不顺利.....当我用拇指快速拖动路径左侧的对象时.
but this dragging is not smooth..... when i drag fast with my thumb the object left from the path.
谢谢
推荐答案
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-拖放精灵与 cocos2d
Probably a little bit late but I was searching for a similar thing. I found this great Tutorial which explained everything: 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;
}
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