I'm relatively new to iOS Objective-C development, and I've come across a problem that I can't find a solution to.
I have a Table View Controller, with two prototype cells on it, which populate fine. This Table View Controller is one of three Tab Views, and the View that sends to the Tab Views has a Navigation Controller. This means that the views within the Tab Views also have a Navigation bar. The bar works fine, in terms of the "back" button working as expected, and the bar being in position. However, (at least on the List View) the Navigation Bar isn't fully recognised - it's title doesn't appear, and the table cells start directly below the status bar, rather than below the navigation bar.
Here's a couple of screenshots showing the problem:
what appears in Xcode (what I expect to happen)
And then on the device, this is what actually appears - the Back button in place and working fine, but no title field, and the table cells start too high.
I've tried adding Navigation Bar's and Navigation Items, and while adding a Navigation Item allows me to put a title on in Xcode, it still doesn't appear on the device in testing. I also tried to add another Navigation Controller just before this view, but that didn't resolve the issue either, and it caused navigation problems further down in the heirachy.
Hope I've been clear enough, please say if I need to post more information - I'm relatively new to Xcode and so not sure what exactly is applicable and what isn't. Thanks!
please try this code, it might fix your table position
// Since in iOS7 the nav bar is translucent by default, so the table view starts at (0,0)
// you can either disable the translucent, which i don't recommend unless you really want to
// or just add 64 pixel on the top of your table view
[self.YOURTABLEVIEW setContentInset:UIEdgeInsetsMake(64, 0, 0, 0)];
and for the title, please try this
self.tabBarController.navigationItem.title =#"YOUT TITLE NAME";
Hope that helps..
Assuming your hierarchy as
NavigationController -> ViewController -> TabBarController -> ViewController1
-> ViewController2
-> ViewController3
If you want to hide navigation item in viewcontroller1, Add the following line
self.navigationController.navigationBarHidden = YES;
If you want to show title in viewcontroller2, Add the following line in
self.navigationController.navigationBarHidden = NO; //add this if you hide navItem viewcontroller1
[self.parentViewController.navigationItem setTitle:#"Title"];
If you want to hide backbutton and show title in viewcontroller3, Add the following line
self.navigationController.navigationBarHidden = NO;
[self.parentViewController.navigationItem setTitle:#"Contacts"];
self.parentViewController.navigationItem.hidesBackButton=YES;
Add this lines to viewdidAppear method instead of ViewdidLoad ,if you have problems inshowing when switching tabs.
I had the same problem, but what I did to create this problem was that my buttons action was connecting to the actual table itself and not the table Controller. I removed the modal action and created a new action to the table controller and it fixed the problem.
Try to click the Navigation Bar from your storyboard or nib.
Then add your title to the property.
Related
I have added a show segue from table cell in one view controller to another table view embedded in a navigation controller. When I click on the cell in the first view the segue works as expected and brings up the new view. However, the "Back" button (with the title of the original view) does not appear in the navigation bar.
I searched SO and found a number of such questions asked in the past (both for Swift and Objective-C). Most of them suggest that the first view needs a title for this to work. I do have a title. I even added one programmatically, just in case. That did not help. One of the answers suggested to add an identifier to the segue; that didn't help me either.
How else can I debug this issue?
It seems like the problem is that you are pushing into a totally new navigationController, remove it, and make segue dirrectly into the new view Detail itself, they have to be in the same navigationController to work
Verify you are not hiding backbutton in destination controller...
I had a left bar button item in storyboard removing the button, back button showed up.
The incorrect navigation bar is appearing on my Table View Controller screen (see Storyboard Below).
I would like what's displayed on the storyboard to be my navigation bar (i.e. with "Main Feed" title and Sign Out button on the top right). However, this is what I'm actually getting -
There are two issues here: 1) The incorrect navigation bar is displaying (this one has a login back button); 2) the first few table view cells are placed underneath the nav bar vs. under it.
This happened after I embedded the Table View controller in the Tab Bar Controller. I want a bottom tab bar in the main portion of my application hence the reason why I added the Tab Bar Controller. Any suggestions on how to fix this? Rather than using the Tab Bar Controller in storyboard, is there a way to do this programatically? Thanks!
The navigation bar that you are seeing on top of the stack is the navigation bar from the UITabBarController itself, that is why you are seeing the back button show "login". There's a few ways to work around this, programmatically:
When you initialize the UITabBarController, set it's navigationController's navigation bar property to "hidden"
Go through each view controller form the beginning of your app up to where you first see this problem and in the "init" method of the viewController you are testing, set the navigationbar to hidden. Something like, self.navigationController?.navigationBar.hidden = true;
This is how you can "debug" this issue, but it's going to take some tweaking to get it right.
Upon clicking the button on the first screen the user is presented with view controllers contained within a tab bar controller. The view controllers have two tableviews in them, the first a top static table and a second table just below. The view controllers in the tab bar controller that are not within the "more" display correctly. If I go to "more" and select a view controller the view is displayed with the top cell pushed down.
If I go to the "more" screen, click edit, and move the order of view controllers in any way, view controller displayed through "more" display correctly. Upon leaving the "more" section the top table cell (top table) is not displayed.
It seems reasonable to me that there is an issue in the UI or storyboard, however nothing jumps out at me as the issue. I've tried both manually setting constraints and also using suggested constraints.
This sample project is available at https://github.com/propstm/NavigationStructureTest
I simply updated the constraints in the Two Table VC , then the issue was not there.
Disable Size classes,and delete the constraint(top tableView) of "vertically space to top layout guide",add pin top space to super view can solve the problem.
Maybe it's a bug of Xcode,see this.
I think it has something to do with the "more" controller provided by the TabBarController having its own navigation controller, and your storyboard set up to extend edges beyond top bars.
Although you are trying to hide the navigation bar, I think its done in the wrong place and should only be required when the item is being presented in the "more" controller. The way its currently implemented confuses the top layout guide, which seems to be left assuming there are two top bars even though one of them is hidden.
I was able to fix your demo project in two ways. By either:
1) Update the storyboard and turn off "extend edges" on the tab bar (and set the tab bar and top bars to be opaque):
OR
2) Simplify the viewWillAppear/Disappear and viewDidAppear/Disappear methods and hide the navigation bar when within the tab bar more controller:
- (void)viewDidAppear:(BOOL)animated{
//self.navigationItem.backBarButtonItem.title = #"HOME";
self.tabBarController.title = #"Entity List";
//Pretty activity indicator
[self.topTableView reloadData];
}
- (void)viewWillAppear:(BOOL)animated {
if (self.navigationController == self.tabBarController.moreNavigationController) {
[self.tabBarController.navigationController setNavigationBarHidden:YES];
} else {
[self.navigationController setNavigationBarHidden:NO];
}
}
- (void)viewWillDisappear:(BOOL)animated {
[self.navigationController.navigationBar setHidden:NO];
}
- (void)viewDidDisappear:(BOOL)animated {
}
This ensures the top navigation appears correctly without messing up the layout guide.
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 have created a splitview controller in a storyboard that has a navigation bar across the top. I also have a master view with a tableview that when selected displays the correct view in the detail view controller.
How can I update the splitview controller's navigation bar title? I know I can access the master's nav bar through "self.navigationItem.rightBarButtonItem" but how do I access the main nav bar from this file?
Thanks
If you have a navigation bar across the top, then you can set the title like this:
self.title = #"this is my title";
If your title is fixed and doesn't change, then just add that line in your viewDidLoad method or where ever you would setup items in your view.
If you are trying to set the title programmatically, then it depends on which view controller you are in when you try to set the title. In the example above, it will set it for the view controller you are in.
If you want to set the opposite view controller navigation bar, you have a couple of ways to choose from depending on when you want to update it.
Generally though you would reference the opposite view controller directly using a delegate or indirectly using the splitViewController.viewControllers array.
it sounds like you already have a reference to the detail view controller. If so and you want to change its title from the master you can do so like this:
[self.detailViewController setTitle:#"New Title"];
hope that helps,
be well