轻扫手势iphone

Question

我在处理滑动时遇到了一些麻烦iPhone,我在界面中创建了一个UISwipeGestureRecognizervar:

UISwipeGestureRecognizer *swipeRecognizer;

并在我的控制器:viewDidLoad方法

- (void)viewDidLoad
{
    [super viewDidLoad];


    // Horizontal swipe
    swipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self 
                                                                          action:@selector(swipeMethod:)];
    swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft; 
    [self addGestureRecognizer:swipeRecognizer];
}

我处理滑动的方法是:

-(void)swipeMethod: (UISwipeGestureRecognizer *) sender
{
    NSLog(@"Swipe!");   
}

当我运行我的代码并刷卡时我什么都没有？我应该得到:刷卡!

谢谢.

Answer 1

我很惊讶不会因无法识别的选择器错误而崩溃.尝试将识别器添加到视图而不是视图控制器:

[self.view addGestureRecognizer:swipeRecognizer]