cocos2d-iphone - cocos2d创建的项目中如何使用UISwipeGestureRecognizer？

Question

我使用 cocos2d 创建了一个项目，现在我想使用 UISwipeGestureRecognizer 来获取上/下/左/右，我该怎么办？多谢

Answer 1

在 .h 文件中添加：

// Add inside @interface
UISwipeGestureRecognizer * _swipeLeftRecognizer;
UISwipeGestureRecognizer * _swipeRightRecognizer;

// Add after @interface
@property (retain) UISwipeGestureRecognizer * swipeLeftRecognizer;
@property (retain) UISwipeGestureRecognizer * swipeRightRecognizer;

在 .m 文件中添加：

// Add after @implementation
@synthesize swipeLeftRecognizer = _swipeLeftRecognizer;
@synthesize swipeRightRecognizer = _swipeRightRecognizer;

// Then add these new methods
- (void)onEnter {
    self.swipeLeftRecognizer = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftSwipe:)] autorelease];
    _swipeLeftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
    [[[CCDirector sharedDirector] openGLView] addGestureRecognizer:_swipeLeftRecognizer];    

    self.swipeRightRecognizer = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightSwipe:)] autorelease];
    _swipeRightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
    [[[CCDirector sharedDirector] openGLView] addGestureRecognizer:_swipeRightRecognizer];    
}

- (void)onExit {
    [[[CCDirector sharedDirector] openGLView] removeGestureRecognizer:_swipeLeftRecognizer];
    [[[CCDirector sharedDirector] openGLView] removeGestureRecognizer:_swipeRightRecognizer];
}

// Add to dealloc
_swipeLeftRecognizer = nil;
[_swipeRightRecognizer release];
_swipeRightRecognizer = nil;

希望它会有所帮助