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CCSprite跟随用户触摸

cocos2d-iphone iphone

Daniel Bramhall · 技术社区 · 10 年前

到目前为止,我已经 CCSprite 使用 CCActionMoveTo 然而,我只有在用户简单地点击时才能使用它。

我希望CCSprite在用户拖动手指时移动,而不是仅仅敲击并移动,随着用户拖动改变方向而改变方向-我对cocos2d相当陌生,并搜索过类似的问题,但一直找不到任何问题。我已经在下面发布了我的代码:

- (id)init
{
    self = [super init];
    if (!self) return(nil);
    self.userInteractionEnabled = YES;
    // Player sprite
    _playerSprite = [CCSprite spriteWithImageNamed:@"PlayerSprite.png"];
    _playerSprite.scale = 0.5;
    _playerSprite.position  = ccp(self.contentSize.width/2, 150);
    [self addChild:_playerSprite];
    return self;
}

-(void) touchBegan:(UITouch *)touch withEvent:(UIEvent *)event {
    CGPoint touchLoc = [touch locationInNode:self];
    CCActionMoveTo *actionMove = [CCActionMoveTo actionWithDuration:0.2f position:ccp(touchLoc.x, 150)];
    [_playerSprite runAction:actionMove];
}

3 回复 | 直到 10 年前

microslop 10 年前

您需要实现touchMoved方法并在其中设置精灵位置。类似于:

- (void)touchMoved:(UITouch *)touch withEvent:(UIEvent *)event {
  CGPoint touchLocation = [touch locationInNode:self];
  _playerSprite.position = touchLocation;
}

Allen S 10 年前

尝试此操作(添加名为previousTouchPos的CGPoint属性):

-(void) touchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint touchLoc = [touch locationInNode:self];
    self.previousTouchPos = touchLoc;

    CCActionMoveTo *actionMove = [CCActionMoveTo actionWithDuration:1.0f position:touchLoc];
    [_playerSprite runAction:actionMove];
}


-(void) touchMoved:(UITouch *)touch withEvent:(UIEvent *)event
{
    CGPoint touchLoc = [touch locationInNode:self];
    CGPoint delta = ccpSub(touchLoc, self.previousTouchPos);

    _playerSprite.position = ccpAdd(_playerSprite.position, delta);
    self.previousTouchPos = touchLoc;

}

Ben-G 10 年前

这听起来像是CCActionFollow的理想用例:

https://www.makegameswith.us/gamernews/365/make-two-nodes-follow-each-other-in-cocos2d-30

如果使用通过块提供目标位置的变体,则可以使用最新的触摸位置作为目标位置。