禁止所有的拖拽返回

    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }

禁止页面左侧滑动返回，注意，如果仅仅需要禁止此单个页面返回，还需要在viewWillDisapper下开放侧滑权限

开启手势

if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
}