iOS 解决iOS7左边缘滑动UIScroView不能返回上一级视图

#import "UIScrollView+MTCategory.h"

@implementation UIScrollView (MTCategory)

#pragma mark - 解决iOS7下UIScroView不能滑动返回
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
        if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]
                       && [otherGestureRecognizer isKindOfClass:[UIScreenEdgePanGestureRecognizer class]])
            {
                return YES;
        } else{
                return  NO;
        }
}
@end

参考： http://www.cnblogs.com/lexingyu/p/3702742.html