关于IQKeyboardManager 在iOS11导航栏消失的问题

关于IQKeyboardManager 在iOS11导航栏消失的问题

问题：  升级到iOS11之后点击键盘时导航栏消失 如下图：

使用版本：pod 'IQKeyboardManager', '~> 5.0.6'

问题原因：IQKeyboardManager 在获取当前顶层控制器的时候获取到了tabBarController 

解决办法： 

找到IQUIView_Hierarchy.m   修改-(UIViewController *)topMostController方法  如下：即可

-(UIViewController *)topMostController{    UIViewController *rootController = [UIApplication sharedApplication].keyWindow.rootViewController;    if([rootController isKindOfClass:[UITabBarController class]]){        UITabBarController *tabBarController = (UITabBarController *)rootController;        UINavigationController *selectController = tabBarController.selectedViewController;        UIViewController *viewController = (UIViewController *)selectController.visibleViewController;        while (viewController.presentedViewController) {            viewController = (UIViewController *)viewController.presentedViewController;        }                return viewController;    }else if ([rootController isKindOfClass:[UINavigationController class]]) {        UINavigationController *selectController = (UINavigationController *)rootController;        return selectController.visibleViewController;    }else if ([rootController isKindOfClass:[UIViewController class]]) {            return rootController;    }    else{        return nil;    } }