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;
}
}
原文：https://blog.csdn.net/zaiwei123456/article/details/78796990
