IQKeyboardManager 在iOS11系统下使得导航栏的背景颜色无法渗透电池栏而出现分节。且导致表格内容区上移等问题。如下图：

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

解决方案：找到IQKeyboardManager框架中IQUIView+Hierarchy.m文件修改-(UIViewController*)topMostController 方法中的代码。实现如下：

-(UIViewController*)topMostController{

    UIViewController  *rootController = [UIApplication  sharedApplication].keyWindow.rootViewController;

    if([rootController isKindOfClass:[UITabBarController class]]){

        UITabBarController *tabBarController = (UITabBarController*)rootController;

        UINavigationController*navController = tabBarController.selectedViewController;

        UIViewController*viewController = (UIViewController*)navController.visibleViewController;

        while(viewController.presentedViewController) {

            viewController = (UIViewController*)viewController.presentedViewController;

        }

        return  viewController;

    }else if([rootController isKindOfClass:[UINavigationController class]]) {

        UINavigationController *navController = (UINavigationController*)rootController;

        return navController.visibleViewController;

    }else if([rootController isKindOfClass:[UIViewController class]]) {

        return rootController;

    }  else{

        return nil;

    }

}