ipad - UITapGestureRecognizer

Question

如何使用

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
}

方法？

Answer 1

手势识别器有 locationInView:view 方法。UIGestureRecognizer 也有 .view 属性，所以你可以使用它。

Answer 2

这是一个例子。

-(void)handleGesture:(UIGestureRecognizer *)gestureRecognizer
{
CGPoint p = [gestureRecognizer locationInView:self.navigationController.toolbar];
CGRect nextButtonRect = CGRectMake(self.navigationController.toolbar.frame.size.width * 2 / 3,
                                   0,
                                   self.navigationController.toolbar.frame.size.width / 3,
                                   self.navigationController.toolbar.frame.size.height);

CGRect previousButtonRect = CGRectMake(0,
                                   0,
                                   self.navigationController.toolbar.frame.size.width / 3,
                                   self.navigationController.toolbar.frame.size.height);

if (CGRectContainsPoint(previousButtonRect, p))
    [self tapOnPreviousNews];

if (CGRectContainsPoint(nextButtonRect, p))
    [self tapOnNextNews];
}