`
UIScreenEdgePanGestureRecognizer *gesture = (UIScreenEdgePanGestureRecognizer
*)self.navigationController.interactivePopGestureRecognizer;
if ([gesture isKindOfClass:[UIScreenEdgePanGestureRecognizer class]]) {
if (enable) {
gesture.edges = UIRectEdgeLeft;
} else {
gesture.edges = UIRectEdgeNone;
}
}`
`