uitabbar

问题 How can I programmatically change the selected item in a UITabBar? 回答1: Swift 3 and later As of Swift 3, you can also use tabBarController.selectedIndex = 0 // (or any other existing index) (Thank you, @nidomiro.) Swift 2.2 and earlier Try the following tabBar.selectedItem = tabBar.items![newIndex] as! UITabBarItem Assuming you have access to the UITabBarController that owns the UITabBar , you can do the following self.selectedViewController = self.viewControllers![newIndex] as!

问题 I have a standard app with a navigation controller managing several UITableViewController classes. I want to add a UITabBar to the root view (a UITableViewController) to manage filtering the selection of objects showin in the UITableView. I dont want/need a UITabBarController. The UITabBar is only for functionality and UI (radio-button style selection and familiar tabbar UI). I just want to manually create a UITabBar and add it to my view anchored/locked to the very bottom of the screen like

问题 This question already has an answer here : UITabBar fully transparent (1 answer) Closed 6 years ago . I have spent the last few hours trying to get the TabBar in a UITabBarController fully transparent (clear background). I use a custom subclass of the UITabBarController and I managed to change the tintColor, the alpha, but the background color definitely remains the one defined in IB. Thanks for your help, I'm getting crazy... 回答1: Here is one way to accomplish that. CGRect frame = CGRectMake

问题 My UITabBarController contains more than 16 view controllers. When I go in the "More" tab, I can see all the UITabBarItems . If I click the "Edit" button, I can see the 16 first icons, but there is not enough room to display more, so starting from the 17th item, the icons are only partially displayed. Starting from the 21st item, the icons are not displayed at all. And it is not possible to access the rest of the icons with a scroll bar. By the way, this question gives a theoretical answer to

问题 How do I update or reload the text color on the UITabBarItem? It will, only if I kill the app and re-open again. Then it will refresh the textColor on the UITabBarItem Swift 5.1, iOS 12 func handleRefreshForTabBar() { DispatchQueue.main.async { //Background self.view.backgroundColor = Theme.current.generalBackground //Images self.tabBar.tintColor = Theme.current.tabTintColor //Bar self.tabBar.barTintColor = Theme.current.tabBarTintColor } } override func viewWillAppear(_ animated: Bool) {

问题 I have searched a lot and beleive me i have come across many questions and sample codes but none of them fit my requirement , it's crazy how can there not be an answer for this. My requirements specifically:- 1. I want a UITabBar not a UITabBarController 2. I want it to be on the top-right corner of my UIView 3. I want two tab bar items on it( need not be assiciated with two view controllers) Now what i did was UITabBar *myTabBar=[UITabBar alloc]initWithFrame:myTabFrame]; [self.view

问题 Can somebody tell me please how can I move title of UITabBarItem for example 2px to top? 回答1: Solution: UITabBarItem *item = [tabBar.items objectAtIndex:0]; item.titlePositionAdjustment = UIOffsetMake(0, -5.0); 回答2: Update for Swift 3 Put this code inside UITabBarController : UITabBarItem.appearance().titlePositionAdjustment = UIOffset(horizontal: 0, vertical: -5) Credit goes to Tim Brown 回答3: Swift 4 Like me, if you are creating tab bar controller inside some other controller just after

问题 I am trying to get my tab bar shadow to look like the one seen in this image: What is the best way of doing this? I am using objective-c Thanks 回答1: You can give shadow by using following code to any UI object tabControl.layer.shadowOffset = CGSizeMake(0, 0); tabControl.layer.shadowRadius = 2; tabControl.layer.shadowColor = [UIColor blackColor].CGColor; tabControl.layer.shadowOpacity = 0.3; Here i gave example for your tabControl object. 回答2: For Swift 4 : self.tabBarController?.tabBar.layer

问题 I have a customised UITabBar and use the following code in the AppDelegate: - (void)tabBarController:(MainUITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { [self customizeTabBar]; } - (void)customizeTabBar { NSLog(@"*******customizeTabBar*******"); UIImage *tabBackground = [[UIImage imageNamed:@"unselectedtab"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)]; // Set background for all UITabBars [[UITabBar appearance]

问题 I took a regular UITabBar and changed it's background image to a custom one which has a lower height, so I changed the height of the frame . At first what I got is a blank space below the tab bar. so I changed the origin of the frame too. But now the blank space has moved up above the tab bar and this is the result: And this is the code declaring the tab bar in the AppDelegate: self.tabContoller = [[UITabBarController alloc] init]; //customizing the tabbar UIImage * tabBackgroundImage =