iphone - cocos2d-iOS-手势识别器

有没有人设法使手势识别在cocos-2d中工作？

我在这里阅读了声称已实现的帖子:http://www.cocos2d-iphone.org/forum/topic/8929

我从这里的git中心打了补丁:https://github.com/xemus/cocos2d-GestureRecognizers/blob/master/README

我做了CCSprite的子类(这是CCNode的子类):

-(id) initWithTexture:(CCTexture2D*)texture rect:(CGRect)rect {
if( (self=[super initWithTexture:texture rect:rect]) )
{
    CCGestureRecognizer* recognizer;
    recognizer = [CCGestureRecognizer
        CCRecognizerWithRecognizerTargetAction:[[[UITapGestureRecognizer alloc]init] autorelease]
                  target:self
                  action:@selector(tap:node:)];
    [self addGestureRecognizer:recognizer];
}
return self;
}

委托(delegate)方法:

- (void) swipe:(UIGestureRecognizer*)recognizer node:(CCNode*)node
{
NSLog(@" I never get called :( ");
}

我的点击事件从未被调用。

有人有这个工作吗？手动进行手势识别以进行滑动检测有多困难？

最佳答案

您需要将手势识别器附加到“上链”对象上。不要将它们附加到各个节点上；将它们附加到UIView(即[[CCDirector sharedDirector] openGLView])。

这是我所做的:

- (UIPanGestureRecognizer *)watchForPan:(SEL)selector number:(int)tapsRequired {
    UIPanGestureRecognizer *recognizer = [[[UIPanGestureRecognizer alloc] initWithTarget:self action:selector] autorelease];
    recognizer.minimumNumberOfTouches = tapsRequired;
    [[[CCDirector sharedDirector] openGLView] addGestureRecognizer:recognizer];
    return recognizer;
}

- (void)unwatch:(UIGestureRecognizer *)gr {
    [[[CCDirector sharedDirector] openGLView] removeGestureRecognizer:gr];
}

此特定代码在场景 Controller 的父类(super class)中使用，因此选择器的目标被硬编码为“self”，但是您可以轻松地将其抽象为传入的对象。同样，您可以对上述内容进行推断，以轻松创建用于水龙头，捏等的手势识别器。

然后，在 Controller 的子类中，我只需要这样做:

- (MyController *)init {
    if ((self = [super init])) {
        [self watchForPan:@selector(panning:) number:1];
    }
    return self;
}

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

    CGPoint p;
    CGPoint v;

    switch( recognizer.state ) {
        case UIGestureRecognizerStatePossible:
        case UIGestureRecognizerStateBegan:
            p = [recognizer locationInView:[CCDirector sharedDirector].openGLView];
            (do something when the pan begins)
            break;
        case UIGestureRecognizerStateChanged:
            p = [recognizer locationInView:[CCDirector sharedDirector].openGLView];
            (do something while the pan is in progress)
            break;
        case UIGestureRecognizerStateFailed:
            break;
        case UIGestureRecognizerStateEnded:
        case UIGestureRecognizerStateCancelled:
            (do something when the pan ends)
            (the below gets the velocity; good for letting player "fling" things)
            v = [recognizer velocityInView:[CCDirector sharedDirector].openGLView];
            break;
    }

}

关于iphone - cocos2d-iOS-手势识别器，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/4985917/