UITapGestureRecognizer

Question

我怎樣才能使用

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

方法考慮的位置？

Answer 1

手勢識別器具有locationInView：view方法。 也UIGestureRecognizer有.view屬性，所以你可以使用它。

Answer 2

這裏是一個例子。

-(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]; 
}