I have a UIViewController embedded in a popover. This controller has two subviews, a UINavigationBar and a UITableView. I try to implement the new search API (as SearchDisplayControlled is deprecated in iOS8).
When I click in the search bar (displaying two scopes), everything is all right, and the navigation bar is still visible. But when I start typing in the search bar, the navigation bar disappears, replaced by a blank area. I tried to add self.searchController.hidesNavigationBarDuringPresentation = NO; in the updateSearchResultsForSearchController: method, but got no result. (note that the controller viewDidLoad defines self.definesPresentationContext = YES;)
Any idea to force navigation being displayed anytime?
I was seeing the same effect - in my case setting the property in viewDidLoad in my view controller made the navigation bar stick around:
- (void)viewDidLoad {
...
self.definesPresentationContext = YES;
...
}
When I'd previously set the same property from a class that was managing the search (initialized after -viewDidLoad had already been called on the VC), I saw the same behaviour of a blank nav bar that you describe.
This work for me
self.navigationController.navigationBar.translucent = true;
Related
I have a Navigation Controller with nav bar. The issue I have is I can set the status bar to white, but once the nav bar animates onto the page, they return to black. I've tried using the following with no success:
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
[UIApplication sharedApplication.setStatusBarStyle = UIStatusBarStyleLightContent;
-(UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleLightContent;
}
and still the time, batter status, etc return to black. I would be fine with making it completely disappear if no one can figure out what I'm doing wrong lol. Thanks in advance.
Starting with iOS 8 the status bar gets its color from the view controller of the top most view that is currently visible. Try setting the following on the Navigation Controller (assuming the UINavigationController view is the top most view):
<navController>.navigationBar.barStyle = UIBarStyleBlack;
If that doesn't work try adding the override to the top level UIViewController as you did (make sure its the primary view controller contained in your UIWindow.. assuming this is not your UINavigationController..]):
-(UIStatusBarStyle) preferredStatusBarStyle
{
return UIStatusBarStyleLightContent;
}
Also:
In the .plist file for your project, make sure the "View controller-based status bar appearance" is set to YES.
Alternative
If you want your
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
command to have an effect set "View controller-based status bar appearance" to NO in your .plist file. Please note though that view controller based status bars are the wave of the future and some third party libraries (like PSPDFKit) now require this option to be enabled.
Hiding Status Bar
If you want to hide the status bar you can try by setting "View controller-based status bar appearance" to NO in your .plist file. Then add the following code to viewWillAppear of your main view controller:
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
I'm having trouble with using the new UISearchController in IOS8. Every example I've found so far uses the search bar as the header view of a UITableView. What do you do when the search bar needs to be displayed somewhere else? For example, placing the searchbar outside the table to prevent it from scrolling? What about using it with something like a UICollectionView?
Am I missing something here? It doesn't seem like this should be that complicated.
Placing the UISearchBar in the titleView of the navigation bar, you can prevent it from scrolling when the tableview is scrolled.
self.searchController.hidesNavigationBarDuringPresentation = NO;
self.searchController.searchBar.searchBarStyle = UISearchBarStyleMinimal;
// Include the search bar within the navigation bar.
self.navigationItem.titleView = self.searchController.searchBar;
self.definesPresentationContext = YES;
UISearchController relies on searchResultsController which should be the view controller that manages the results of the search.
Make sure that the view controller pointed to by searchResultsController property updates based on the text in UISearchBar when the UISearchController is active. This way you can use the UISearchController with tableview or collectionview.
I've followed a how-to to create a simple Tab bar controller with a navigation controller in the first tab. Until here all is working correctly, expect a strange issue on the layout.
When the app starts the first time, the Navigation Bar on the top of the first loaded nib is a little outside of the view. I cannot figure out why this happen. In the first view there is a button "Add new System" that opens a modal view. If I press this button and the modal view appears and then I dismiss the modal going back to the initial view, then the Navigation bar at the top is placed/refreshed correctly. The same happens if I press the second TAB (it's a simple nib without Navigation controller for now) and then back to the first TAB, the Navigation bar is placed in the correct position.
Here a screenshot on the first startup:
And here when I press the modal view or the second TAB and then back to the first view:
The code is quit simple following one of the numerous tutorials on the net. I'm NOT using storyboard. Only customization was adding the buttons on the top of the Navigation Bar:
UIImage *editbuttonImage = [UIImage imageNamed:#"edit_pressed.png"];
UIButton *editButton = [UIButton buttonWithType:UIButtonTypeCustom];
[editButton setBackgroundImage:editbuttonImage forState:UIControlStateNormal];
editButton.frame = CGRectMake(0, 0, editbuttonImage.size.width, editbuttonImage.size.height);
[editButton addTarget:self action:#selector(leaveEditMode)
forControlEvents:UIControlEventTouchUpInside];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]
initWithCustomView:editButton];
[editButton release];
[editbuttonImage release];
No other modifications were made. The nib was used before in a single view. Then I've tried to insert it into a TAB Controller + Navigation Controller.
I could post the whole code in case it's needed. Under Select System there is a Table View, in these pictures empty, also not shown.
Thank's for the help!
Simon
I've solved the issue myself. On startup I've setup to hide the status bar and shown it again in the app delegate. The directive used :
[[UIApplication sharedApplication] setStatusBarHidden:NO];
was after adding the navController as subview. Also the Navigation controller BAR was not out of the view, simply under the status bar.
Hope this helps someone :)
Cheers, Simon
It's easy enough to drag and drop bar button items onto a view controller's navigation bar in a storyboard in Interface Builder. In this way, you can set the leftBarButtonItem and rightBarButtonItem outlets of the view controller's navigation item. But there's also a backBarButtonItem outlet, and it's not obvious at all how to set it. How can I set a custom back bar button item using Interface Builder?
Select the view controller whose navigation items you want to change. The black bar displaying the identity of the view controller changes to an iconified tray of its referenced objects.
Drag and drop a bar button item from the object library onto the tray.
Right-click on the view controller's navigation item in the main object tray on the left-hand side. Wire up the newly added button as the navigation item's backBarButtonItem outlet.
Select the bar button and configure it in any way you choose with the Attributes Inspector.
As #wcochran noted above, when working with viewControllers pushed onto a navigationController's stack, the backBarButtonItem outlet is already wired and can't be changed. Furthermore, selecting the child VC's navigationItem and changing the Back Button text in IB doesn't do what you would expect.
Now you might think that replacing the child VC's backBarButtonItem would solve the problem, but it doesn't. Confusingly, if you want to set the title of the back button of a child VC, you have to set the back button title of its parent (!), like so:
- (void)viewWillAppear:(BOOL)animated // in the parent VC!
{
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
self.navigationItem.backBarButtonItem = backButton;
}
This won't do anything on the parent VC. In fact, if the parent is the navigationController's RootViewController, there won't be a back button at all. But the child will inherit (or pick up) the back button you've created.
This only applies to the immediate child VC, so if you want to maintain the label down through the navigationController's stack you need to set it on each parent.
Thanks to #wiliz in #iphonedev for explaining this to me.
As #AdamBlock noted above, you have to set things right in the parent VC.
He shows how to do this programmatically. It is also possible to do this in interface builder.
Select the parent VC
Select the navigation Item
Open the Attributes inspector
Set the title for the Back Button.
In Interface Builder, you can change the Navigation Item back button's title.
Programmatically, you can set a custom back button in your view controller's viewDidLoad method. In this example we set the button's image to an image named "customImage.png":
- (void)viewDidLoad
{
[super viewDidLoad];
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:#"Custom" style:UIBarButtonItemStyleBordered target:self action:nil];
// Set custom image here
backButton.image = [UIImage imageNamed:#"customImage.png"];
self.navigationItem.backBarButtonItem = backButton;
}
I am really new to iPhone development and I need help setting up my views.
I have a view that is named FirstViewController.xib and a controller class for this view.
In my MainWindox.xib I have setup a root controller with a moveToNextView function that is connected to the options bar button item.
So when I click on this item the current view switches to the first view and I am able to swticht back. That works fine so far.
The navigation bar at the top of the screen from the MainWindow.xib is displayed in the first view, too. But when I open FirstViewController.xib there isn't any navigation bar defined (but on build&run it is displayed).
This is a problem for me because I want to add a save bar item to the first view. How do I solve that?
Assuming you have a UIViewController (or UIViewController subclass) that is a child of a UINavigationController. Note, I'm using storyboards so your results may vary when using xibs.
If you do not see a UINavigationBar on the interface, try manually changing the simulated metrics.
Drag a Navigation Item onto the view (anywhere). You should now have a place to enter the title in the interface builder.
Now you can drag Bar Button Items onto the nav bar.
You have to do it from code. Add to your FirstViewController class viewDidLoad method:
UIBarButtonItem *anotherButton = [[UIBarButtonItem alloc] initWithTitle:#"Save" style:UIBarButtonItemStyleDone target:self action:#selector(doSave:)];
self.navigationItem.rightBarButtonItem = anotherButton;
[anotherButton release];
Just drag a bar button item onto your nav bar in Interface Builder. Xcode automatically wires it up then you can use it like anything else...