uitabbarcontroller

问题 I just embedded my UINavigationController into a UITabBarController. I can no longer see my view title or edit button. Please see storyboard below. How do I make the edit button visible again? My Storyboard: 回答1: Rather than the following organization (which you're currently using): NavController -> TabBarController -> ViewControllerA \ -> ViewControllerB You must do the following: TabBarController -> NavControllerA -> ViewControllerA \ -> NavControllerB -> ViewControllerB UITabBarController

问题 I have a custom tabbar with custom tabbar items. Everything works as I want it to, besides when a tap has been tapped and is in a selected state, it does not use my custom highlighted background if re-tapped. So far I set: UIButton *tap = [UIButton buttonWithType:UIButtonTypeCustom]; [tap setBackgroundImage:img forState:UIControlStateNormal]; [tap setBackgroundImage:[UIImage imageNamed:@"img_down"] forState:UIControlStateHighlighted]; [tap setBackgroundImage:[UIImage imageNamed:@"img_down"]

问题 I am currently in need of 8 TabBarItems , and I can show just 4 items in view. And I need to be able to scroll to the next 4 tabBarItems. In the default behavior of the UITabBar, you normally get a 'MORE' tabbaritem for more than 5 tab bar items. I want it to be the Scroll Button in place of the MORE button. So ~ ~If I press the scroll button (or the fifth) tabBarItem, it should display 4 more tab bar items with a back scroll button. These are my ways of doing this - - Implementing a Scroll

问题 I'm new to swift, going to create an UI in that a tabor is being shown in it , As i gone through the apple's human interface guidelines , they said not use UITabBar on top. We can use it by custom , but many of them said while submitting in App Store it will get rejected. So instead of UITabar what should use for the tab on top? 回答1: You should use a segmented control in the navigation bar, as in this example form the iOS Human Interface Guidelines: https://developer.apple.com/ios/human

问题 I have 1 main UIViewController that contains a UITabBarController. The tab bar controller has 4 UIViewControllers (each managed by UINavigationControllers). Succinctly, it looks like this: MainViewController | |--- FirstUIViewController | |--- SecondUIViewController | |--- ThirdUIViewController | |--- FourthUIViewController The FirstUIViewController is loaded by default. In the SecondUIViewController, there is an event that can occur. This event has specific data that is passed along with it.

问题 Hi I am trying to add and remove tab bar elements dynamically. There are two arrays. One is shown first with an added tabbaritem with name "More" and other array is added to the tabbar when user presses More. User can come back to first array by pressing Less tabbaritem in second array. Problem is that when i frequently press More and Less tabbaritems in sequence More, Less, More, Less, More, Less - The app crashes after last Less. Array seems ok to me and so is tabbar controller. I am not

问题 I have a UITabBarController interface with 4 tabs. Each tab has a UINavigationController . How would I return to the topmost UIViewController in each UINavigationController whenever a tab bar button is pressed? 回答1: -popToRootViewControllerAnimated 来源： https://stackoverflow.com/questions/4199758/return-to-top-of-uinavigationcontroller-stack-when-clicking-a-tab

问题 I have a UITabBarController based application and I want to pass data from one view to another. I am doing this in storyboard and I am just doing some testing, before bringing it into the main application. I am just trying this with a NSString at the moment. I am able to pass data to the VC in question when I use a modal transition using this code: NSString *sendingString = @"This string has some content"; UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle

问题 Is it possible to change/replace ViewContoller (and View) for one of the Tabs in a UITabBarController? I would like to switch between 3 different ViewControllers in any order from a specific Tab (that´s why NavigationController is not possible). 回答1: They are set (in mass) using setViewControllers:animated: so you could do something like this. // Assume tabController is the tab controller // and newVC is the controller you want to be the new view controller at index 0 NSMutableArray

问题 I want to display activity indicator when user clicks on Tab Bar. How do I do that? 回答1: You will need to conform to the <UITabBarDelegate> protocol to be informed when a tab is pressed and then you will need to implement - (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item This is to give you the hook to be able to now set the activity indicator then: If you are referring to the indicator in the title bar at the top then the code is [[UIApplication sharedApplication]