UIScrollView与iOS系统的左边缘滑动冲突解决办法

让scrollview的滑动与系统的边缘滑动返回共存

[mainScrollView.panGestureRecognizer requireGestureRecognizerToFail:self.navigationController.interactivePopGestureRecognizer];

//scrollview 与 右滑手势冲突问题解决
    UIScreenEdgePanGestureRecognizer *screenEdgePanGestureRecognizer = self.navigationController.screenEdgePanGestureRecognizer;
    [mainScrollView.panGestureRecognizer requireGestureRecognizerToFail:screenEdgePanGestureRecognizer];