uitabbarcontroller

问题 My main view controller is a UITabBarController , with 4 UINavigationControllers as the tab bar items. Each navigation bar is a couple of different views that get pushed onto it's stack. I have a single view that I want autorotated, but I can't get willAnimateFirstHalfOfRotationToInterfaceOrientation to be called within that view controller. I've tried subclassing my UITabBarController and UINaviationControllers and adding an override for shouldAutorotateToInterfaceOrientation like so: -

问题 I can set the background once, but after that it never changes again. I've seen all examples on stackoverflow. The code examples look always the same. I've set the delegate. The images are all ok. I've set them one after the other as default image and the will show. But after the app finished launching nothing happens with the background anymore. Here's my code: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [self

问题 I have added an ImageView as a subview of my TabBar (that has three NavigationControllers). When i tap on any of the tabs of the tabBarController, then the Image on the imageView changes accordingly (the image shows that particular tab selected and others unselected). However, the image always shows an extra line on the tabBar. It looks like it crosses the limit of the tabBar. The dimensions of my image is 320x64 pixels (for non-retina iPhone) and 640x128 pixels (for retina iPhone). Here's

问题 I'm trying to use the following code to display a tabbarcontroller UITabBarController *tc = [[self storyboard] instantiateViewControllerWithIdentifier:@"tabbarcontroller"]; [self.navigationController pushViewController:tc animated:YES]; It does load the view, and I can tell it which of the tabs I want it to default to. The problem is the tabs don't show. From what I've read I gather it has something to do with putting the tab controller inside of the navigation controller, but I couldn't find

问题 I just created a tab bar controller in my project with 4 tabs in total. It works fine between the 4 UIViewControllers. However when I navigate to another UIViewController which is not one of the 4 tabs, the tab bar disappears. I want it to be seen in every page. How can I do this? 回答1: Ok. The way this is done is by using navigation controllers on each tab. So, you have your tab bar controller. Then each tab has a navigation controller first and the root view controller of the navigation

问题 The following example: http://www.raddonline.com/blogs/geek-journal/iphone-sdk-uitabbarcontroller-how-to-save-user-customized-tab-order/ Doesn't work in iOS4. I would like to be able to save the order of my tabs when the application is shut down. 回答1: You can set your Application delegate to also be a UITabBarController delegate, and when the tab is selected, you can record the selection to [NSUserDefaults standardDefaults] as an integer (selected index of tab bar controller). Do this in: -

问题 Quoting from this: https://developer.apple.com/library/ios/qa/qa1797/_index.html "Applications that use an opaque UINavigationController or UITabBarController automatically keep their content below the status bar." My root view controller is a UITabBarController however when that loads a table view controller the status bar is covering it. Is this documentation therefore incorrect? Note I'm not asking about how to solve this issue, there's plenty of questions about that already, I'm asking if

问题 :D i'm have a storyboard with a TabBarController but when i do the relationship with my others seven view controllers in mi tab bar appears a "more" Tab, How can i put this seven tabs in one tabbar? I´ll have to do manually? with a tabbarcontroller class? or implementing Tabbar Delegate in a uiviewcontroller, But i dont have any idea how to do this. Thank You Soo much! Please Help Me. Thanks Again. 回答1: I believe Apple actively discourages people from doing this in their apps, and so do I. It

问题 I have Four Tabs in My Project By Default First tab is selected which is Home Class When user navigate to any other class by selecting any tab i have to check that time that if user is loggedin in my application then he will navigate to class which he selected else he move to Login Screen. if(appDelegate.sessionId==0) { Login *objLogin=[[[Login alloc] initWithNibName:@"Login" bundle:nil] autorelease]; [self.navigationController pushViewController:objLogin animated:YES]; } else { CreatePoll

问题 On photo below I show you my storyboard. On TableView Controller I have expandable menu. What I cannot achieve right now is to switch on second tab bar item (green one) and let it know what is ID of selected menu item. Between tab bar controller and green and blue controllers I have relationship "view controllers". I tried to call directly green view controller with this code: let secondTab = self.storyboard?.instantiateViewController(withIdentifier: "secondstoryboardid") as! SecondVC self