Question

我尝试按顺序追踪多点触控，这就是我所做的：

1.创建一个cocos2d应用程序 2.启用多点触控 3.在touchesBegin中添加代码：

- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSSet *allTouches = [event allTouches];
    for (int i = 0; i < allTouches.count; i++) {

        UITouch *touch = [[allTouches allObjects] objectAtIndex:i];
        CGPoint touchLocation = [touch locationInView: [touch view]];
        CGPoint location = [[CCDirector sharedDirector]
                                              convertToGL:touchLocation];
        NSLog(@"allTouches %d %0.1f, %0.1f", (i + 1), location.x, location.y);
    }
}

我首先尝试了“[触摸所有对象]”，但这需要多点触控同时发生。我想要的是一次接收多点触控。所以我用[event allTouches];

4.我通过一次一个地戴上手指来测试代码，但是输出序列似乎是raomdom（第一个手指有小xVal和第二个大xVal，间隔大于2s）：

result 1:
2011-03-31 10:54:35.847 MultiTouchDemo[2788:207] allTouches 1 58.0, 458.0
2011-03-31 10:54:38.045 MultiTouchDemo[2788:207] allTouches 1 56.0, 453.0
2011-03-31 10:54:38.046 MultiTouchDemo[2788:207] allTouches 2 930.0, 429.0

result 2:
2011-03-31 10:55:11.659 MultiTouchDemo[2788:207] allTouches 1 86.0, 415.0
2011-03-31 10:55:13.378 MultiTouchDemo[2788:207] allTouches 1 965.0, 409.0
2011-03-31 10:55:13.380 MultiTouchDemo[2788:207] allTouches 2 84.0, 413.0

result 3:
2011-03-31 10:55:32.991 MultiTouchDemo[2788:207] allTouches 1 76.0, 453.0
2011-03-31 10:55:34.630 MultiTouchDemo[2788:207] allTouches 1 877.0, 430.0
2011-03-31 10:55:34.631 MultiTouchDemo[2788:207] allTouches 2 76.0, 455.0

result 4:
2011-03-31 10:55:45.960 MultiTouchDemo[2788:207] allTouches 1 94.0, 440.0
2011-03-31 10:55:47.134 MultiTouchDemo[2788:207] allTouches 1 92.0, 438.0
2011-03-31 10:55:47.136 MultiTouchDemo[2788:207] allTouches 2 934.0, 358.0

所以你可以在[allTouches allObjects]中看到第二根手指的索引似乎一直在改变。

如果我想在单个设备上制作游戏支持多人游戏，我想跟踪他们的表演，我怎么能这样做所有这些随机的pos？

希望有人可以帮助我，谢谢^ _ ^

Answer 1

您可以自己存储触摸。在ccTouchesBegan的第一次调用中，将所有触摸存储在列表中。在后续呼叫中，将列表中尚未包含的任何触摸添加到列表的末尾。然后，当调用ccTouchesEnded时，擦除列表。

如何按顺序检测多点触控？

1 个答案: