Question

我一直在处理这个问题很长一段时间。我想要做的是让CCSprite的左/右移动由屏幕左侧或右侧的触摸控制。

如果在每次触摸后抬起手指，这样做是没有问题的。但我想要的最好用一个例子来描述：玩家触摸屏幕的左侧，精灵移动到左侧。现在玩家（虽然仍然触摸左侧）触及右侧......精灵现在应该向右移动。现在玩家左手上有一个手指，右手上有一个手指，如果他现在从右侧抬起触摸，精灵应再次向左移动。

这就是我现在所拥有的：

-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSSet *allTouches = [event allTouches];
    UITouch * touch = [[allTouches allObjects] objectAtIndex:0];
    CGPoint location = [touch locationInView: [touch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];

    if (location.x < 240) {
        [player walk:kkMoveLeft];
    } else if (location.x > 240) {
        [player walk:kkMoveRight];
    }

    //Swipe Detection Part 1
    firstTouch = location;
}

-(void) ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    NSSet *allTouches = [event allTouches];
    UITouch * touch = [[allTouches allObjects] objectAtIndex:0];
    CGPoint location = [touch locationInView: [touch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];

    //Swipe Detection Part 2
    lastTouch = location;

    float swipeLength = ccpDistance(firstTouch, lastTouch);

    if (firstTouch.y < lastTouch.y && swipeLength > 60) {
        [player jump:kkJumpUp];
    } else if (firstTouch.y > lastTouch.y && swipeLength > 60){
        [player jump:kkJumpDown];
    }

    [player endWalk];

}

如果有人能告诉我如何解决这个问题，我会很感激。谢谢。

更新我的解决方案：

//1. Enable multitouch in the appDelegate
[glView setMultipleTouchEnabled:YES];

//2. Create an Array to keep track of active touches
touchArray = [[NSMutableArray alloc] init];

//3. Touch Methods
-(void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    for (UITouch *touch in touches) {
        if (![touchArray containsObject:touch]) {
            [touchArray addObject:touch];
            CGPoint location = [touch locationInView:[touch view]];
            location = [[CCDirector sharedDirector] convertToGL:location];
            CCLOG(@"start: %f", location.x);
            if (location.x < 240) {
                [player walk:kkMoveLeft];
            } else if (location.x > 240) {
                [player walk:kkMoveRight];
            }
        }
    }

}

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

    for (UITouch *touch in touches) {
        [touchArray removeObject:touch];
        CGPoint location = [touch locationInView:[touch view]];
        location = [[CCDirector sharedDirector] convertToGL:location];
        CCLOG(@"end: %f", location.x);
    }

    for (UITouch *touch in touchArray) {
        CGPoint location = [touch locationInView:[touch view]];
        location = [[CCDirector sharedDirector] convertToGL:location];
        CCLOG(@"still: %f", location.x);
        if (location.x < 240) {
            [player walk:kkMoveLeft];
        } else if (location.x > 240) {
            [player walk:kkMoveRight];
        }
    }


    if ([touchArray count] == 0) {
        [player endWalk];
    }

}

Answer 1

如果我理解你的问题，你应该做的是：

ccTouchesEnded

，而不是简单地调用endWalk，检查是否仍然存在任何触摸（为此，您可以迭代allTouches）;
在适当的情况下（即，触摸仍在激活播放器），请致电startWalk。
如果没有触摸，请拨打endWalk。

代码与ccTouchesBegan中的代码相似，只有你迭代（我不确定touchesEnded中索引0包含的allTouches）。

老答案：

你现在没有说你如何处理接触。无论如何，要走的路是定义ccTouches*方法（与ccTouch*相比），其中*可以是：Began，Moved，Ended。

-(void)tccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:[touch view]];
location = [[CCDirector sharedDirector] convertToGL:location];
    ...
}
-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
  ...
}
-(void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
  ...
}

请记住，touchesBegan会在检测到的每个 new 触摸时触发。因此，如果您想知道当前有效的所有触摸的状态，则必须使用allTouches。

还要查看this post from iphonesdk，我发现这些方法中的触摸语义很有见地。

MultiTouch控制精灵运动 - cocos2d

1 个答案: