IOS UIScrollView 手势返回冲突处理

#pragma mark----以下代理控制UIScrollView的手势返回代理

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer

*)gestureRecognizer {

       

        if ([self panBack:gestureRecognizer]) {

           

            return NO;

         }

       

        return YES;

      }

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer {

    if ([self panBack:gestureRecognizer]) {

        return YES;

    }

    return NO;

}

   

//location_X可自己定义,其代表的是滑动返回距左边的有效长度

- (BOOL)panBack:(UIGestureRecognizer*)gestureRecognizer {

   

int location_X = 100;

    if (gestureRecognizer ==self.panGestureRecognizer) {

       

UIPanGestureRecognizer *pan = (UIPanGestureRecognizer*)gestureRecognizer;

       

CGPoint point = [pan translationInView:self];

       

UIGestureRecognizerState state = gestureRecognizer.state;

        if (UIGestureRecognizerStateBegan == state || UIGestureRecognizerStatePossible== state) {

           

CGPoint location = [gestureRecognizer locationInView:self];

            if (point.x > 0 && location.x < location_X && self.contentOffset.x <= 0) {

                return YES;

            }

        }

    }

    return

NO

;

}