Cocos2D - 无需触摸即可拖动 Sprite！答案

【问题标题】：Cocos2D - Drag Sprite without Touch!Cocos2D - 无需触摸即可拖动 Sprite！
【发布时间】：2011-07-13 19:59:46
【问题描述】：

我是 cocos2d 的新手，正在阅读很多教程我想做的是触摸屏幕，让精灵跟随我的触摸。松开触摸时，精灵停止当触摸远离精灵时，即使我的手指连续移动，精灵也应该开始移动。我该怎么做？

我尝试不同的方式：

-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
    isMoving = YES;
    [self schedule:@selector(moveSprite:)];
    return YES;
}

-(void) ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event {
    isMoving = NO;
    [self unschedule:@selector(moveSprite:)];
}

- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event
{
    if (isMoving)
    {
        touchLocation = [touch locationInView: [touch view]];
        touchLocation = [[CCDirector sharedDirector] convertToGL: touchLocation];
        touchLocation = [self convertToNodeSpace:touchLocation];
    }
}

-(void)moveSprite:(ccTime) dt {

    CGPoint moveVector = ccpSub(touchLocation, mySprite.position);

    float distanceToMove = ccpLength(moveVector);
    float velo = 480.0/3.0;
    float moveDuration = distanceToMove / velo;

    self.moveAction = [CCSequence actions:
                       [CCMoveTo actionWithDuration:moveDuration position:touchLocation],
                       nil
                       ];

    [mySprite runAction:_moveAction];   

}

或再次使用：

- (void)handlePanFrom:(UIPanGestureRecognizer *)recognizer {

    CGPoint touchLocation = [recognizer locationInView:recognizer.view];
    touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    touchLocation = [self convertToNodeSpace:touchLocation];                

    moveAction = [CCSequence actions:
                       [CCMoveTo actionWithDuration:2.0f position:touchLocation],
                       nil
                       ];

    [mySprite runAction:moveAction];
}

或者简单的

- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event 
{    
    touchLocation = [touch locationInView: [touch view]];       
    touchLocation = [[CCDirector sharedDirector] convertToGL: touchLocation];
    touchLocation = [self convertToNodeSpace:touchLocation];

    [_mySprite stopAction:_moveAction];
    _moveAction = [CCMoveTo actionWithDuration:1 position:touchLocation];
    [_mySprite runAction:_moveAction];
}

有人可以帮忙吗？非常感谢！

【问题讨论】：

第三个在我看来应该可以工作。它实际上在做什么？

标签： iphone xcode cocos2d-iphone touch sprite

【解决方案1】：

第三个效果不好，即使我检查'moveDuration'并将其放入动作中，动作也不流畅

【讨论】：