给Cocos2D视图添加手势支持

概述见如下代码： UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeLeft)];

见如下代码：

UISwipeGestureRecognizer *swipeleft = [[UISwipeGestureRecognizer alloc]initWithTarget:self                                                                        action:@selector(swipeleft)];    swipeleft.direction = UISwipeGestureRecognizerDirectionleft;    [[[CCDirector sharedDirector] vIEw] addGestureRecognizer:swipeleft];    UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc]initWithTarget:self                                                                        action:@selector(swipeRight)];    swipeRight.direction = UISwipeGestureRecognizerDirectionRight;    [[[CCDirector sharedDirector] vIEw]addGestureRecognizer:swipeRight];    UISwipeGestureRecognizer *swipeUp = [[UISwipeGestureRecognizer alloc]initWithTarget:self                                                                        action:@selector(swipeUp)];    swipeUp.direction = UISwipeGestureRecognizerDirectionUp;    [[[CCDirector sharedDirector] vIEw]addGestureRecognizer:swipeUp];    UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc]initWithTarget:self                                                                        action:@selector(swipeDown)];    swipeDown.direction = UISwipeGestureRecognizerDirectionDown;    [[[CCDirector sharedDirector] vIEw]addGestureRecognizer:swipeDown];

以上代码将添加4个监听器(Listeners)监视滑向4个不同方向。

手势识别器需要添加到UIVIEw上。而Cocos2D应用程序的主UIVIEw是OpenGL vIEw，该vIEw用来渲染整个Cocos2D app的显示的内容。

我们可以通过CCDirector实例的vIEw属性来访问该main UIVIEw。

UISwipeGustureRecognizer为每个滑动方向关联一个方法。

iOS的输入处理就是可以这么简单。

总结

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