前段时间公司App做了一个类似评论的功能,在界面底部有一个输入评论内容的UITextView控件,键盘在多次收起、弹出操作时,偶尔会在收起后出现导航栏电池条变白的问题,刚开始知道原因可能是IQKeyboardManager导致,但是一直没找到根源,一番自摸之后写了下面的方法进行处理,但是需要在每个可能出现这种问题的界面都进行处理。
- (void)textViewDidEndEditing:(UITextView *)textView { NSArray*naviBarSubviews = [XXXApp currentNavController].navigationBar.subviews; for (UIView *subView in naviBarSubviews) { if ([subView isKindOfClass:NSClassFromString(@"_UIBarBackground")]) { if (ScreenSize_X == [XXXContextInfo deviceScreenSize]) { subView.frame = CGRectMake(0, -44, kXXScreenWidth, 88); } else { subView.frame = CGRectMake(0, -20, kXXScreenWidth, 64); } } } }
在这样处理后,电池条变回正常,但是push和pop还可能导致其他界面出现问题,又在导航控制器代理方法里做了处理。
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated { NSArray*naviBarSubviews = self.navigationBar.subviews; for (UIView *subView in naviBarSubviews) { if ([subView isKindOfClass:NSClassFromString(@"_UIBarBackground")]) { if (ScreenSize_X == [XXContextInfo deviceScreenSize]) { subView.frame = CGRectMake(0, -44, kXXScreenWidth, 88); } else { subView.frame = CGRectMake(0, -20, kXXScreenWidth, 64); } } } }
这样处理十分麻烦,还很low,最后看到其他同学分享的处理方法,问题才得到彻底处理。方法就是找到IQKeyboardManager框架中IQUIView+Hierarchy.m文件,修改 -(UIViewController *)topMostController 方法中的代码代码如下。
- (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; } }