I'm currently making an app which has 4 pages accessible via a tab bar, no problems there. However I have a button on one of the viewcontrollers (lets say A) that opens up another viewcontroller (B). B opens fine, the problem I have now is that the tab bar disappears as it isn't linked to the tab bar controller. Also creating a back button on B to A hasn't helped as the tab bar has gone from A where it usually is.
How would I get the tab bar to show on every viewcontroller I create without there needing to be an icon for every viewcontroller?
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So, I am still in a learning phase of iOS programming using Swift and got stuck in one issue.
I have a Tab bar controller with options in the tab bar at the bottom.
In one of the tab pages, I have table cells, on click of each, I move the user to a WebView (Embedded in a UIViewController).
On the webView I have placed a back button, which is linked to the main Tab Bar Controller through a segue.
I am able to come back to tab bar controller successfully, but after coming back the tab bar at the bottom does not show.
Also, how can I remove the "
I have attached the main.storyboard screenshot for reference.Main Storyboard flow
I got it working by using the Segue type as "Show Detail" instead of just "Show".
I have a tabbed based iOS application. The fourth tab is linked to a UINavigationController. When I navigate to the home tab from the fourth tab, the UI elements of the home tab are pushed down. However, if I rotate the phone to landscape and then back to portrait, everything has moved up and is in the correct place.
In Storyboard, I set the top bar to none. I have the UINavigationBar hidden in the fourth tab/view controller before I navigate to the home tab.
Why would it be that the rotation fixes the constraints? How can I fix the UI elements such that they are not pushed down in the first place?
Here is a screen shot of my storyboard:
Your question doesn't really make sense. A 4th tab would not be embedded in a navigation controller. Instead, the 4th tab would link to a navigation controller. When you first select that tab you'd see the root view controller and it's navigation bar item. If you pushed a new view controller it would get pushed onto the navigation controller in tab 4. If you switch to one of the other tabs then the navigation controller will be swapped away and it's navigation bar will no longer be visible. Swap back to tab 4 you'll see it again, complete with it's navigation bar.
I created a sample app in order to confirm what I'm describing, as I haven't used tab bar controllers a lot, and not in quite a while I can upload the project if you really need to see it. It only contains a couple of lines of code (to implement the button on the navigation controller's view controller that creates and pushes a new view controller.)
I looked at the following two resources: Tab bar disappears after segue and My Tab bar controller disappears after a push segue. However, both of them are in Objective-C and they don't seem to address the issue that I am having.
Here is my Main Story Board:
Zoomed in is:
Now, let's call the view controller that has Sign Up and Log In VC1 and the one with the Facebook button, VC2. When I go to VC1 from the Tab Bar Controller, everything is good. I have the tab bar on the bottom of my VC1. And I tap Sign Up and the tab bar is gone. Which I want. And when I go back to VC1 (there is a navigation bar on VC2 with the button cancel that I programmatically added in, and when clicked on, takes me to VC1), the tab bar is gone. But I want the tab bar there.
Some people have suggested me to use a navigation controller. But I do not want to use it because I don't want the tab bar to appear when the user clicks on Sign Up. And, the navigation controller only allows for right to left and left to right segues and I want custom segues (I tried customizing the segues for a navigation controller and it caused a crash for me).
So my question is, does anybody know how to keep the tab bar on VC1 AFTER going to another View Controller WITHOUT a tab bar, and going back to VC1 WITH the tab bar?
Sorry for the long post.
My app is based around a UINavigationController. On some screens I have a UITabBarController embedded within. When I go to a screen with the tab bar everything works fine on the first tab. (each tab is a UITableViewController) I can tap a cell of the table view and it'll take me to the next page by correctly pushing it onto my nav controller. If I go to another tab it loads the table view fine, but if I tap a cell to take me to another view I get this error:
Nested push animation can result in corrupted navigation bar
Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
It pushes on the next page, but then if I attempt to press the back button on the nav bar the app will crash.
How could I go about fixing this? I looked at multiple other responses to similar problems, but none of them have helped me with this.
It would be really helpful if you share your code.
However this may be helpful for you:
while using tab bar , you should try that every single tab has its own navigation controller and use individual navigation controller to move to specific viewcontrller of specific tab. I know its hard to understand like this..
For e.g in app del you have your main navigation controller using which you push to next view controller ,say "SecondViewController".
Now this second one has got one tab bar with 4 tabs tab1,tab2,tab3,tab4. now each tab can have any no of view controllers associated with them. For e.g on tab1,you move to another screen and again from there to next screen and so on.
So to manage them there should be separate navigation controllers like,tab1nav,tab2nav,tab3nav,tab4nav.
tabBarController.viewControllers = [NSArray arrayWithObjects:"tab1nav".....and so on all nav, nil];
Now depending in which tab you are, use that tab's navigation controller to move to next screen of that tab or move back.
If you have viewDidAppear function,
Remember to put [super viewDidAppear:animated]; inside the function.
I am developing an iPad application.
My application is a UITabBar based application with 5 tabs.
Now my requirement is to show a view controller outside these 5 tabs.
Explanation:
For example I have 5 tabs, A, B, C, D, E.
A is selected by default.
Now I have to show a new view controller say, F. But when I show that view none of the tabbar item should be selected.
What I have tried:
I created a UINavigationController as 6th tab. Now its not visible at the bottom and it nearly produces the effect I needed but have following two problems.
Tab bar items are not center aligned (Due to one hidden tab at right)
User can tab that hidden tab
Update:
Actually I am following an already developed application and I am sure its possible.
Scenario is I have 5 tabs that user can access without login. On navigation bar I have login button. When user is logged in I have a menu button in my navigation bar. Now tapping menu will show a view that doesn't belongs any of the tabs below. And that's why I need implementation explained above.
Work around I used to achieve above effect.
When I need to push my new UIViewController for which I want to deselect all of the UITabBarItem of my tabBarController, first I do the following things
Set selected index of tabBarController to last tab.
Set deselected image in last UITabBarItem
Get navigation controller of last tab and pop it to RootViewController.
Now push my new controller
Hide back navigation button in my view controller.
Hence I am able to show a Viewcontroller keeping user experience as current view is not in any of the tabs.
Thanx.
Sounds like a job for a modal view controller, i.e. one that's displayed in response to some user interaction other than selecting it via the tab bar.