uinavigationitem

how could I get the frame of a rightbarbuttonItem in swift? I found this : UIBarButtonItem: How can I find its frame? but it says cannot convert NSString to UIView, or cannot convert NSString to String : let str : NSString = "view" //or type String let theView : UIView = self.navigationItem.rightBarButtonItem!.valueForKey("view")//or 'str' The goal is to remove the rightBarButtonItem, add an imageView instead, and move it with a fadeOut effect. Thanks Christian Wörz You should try it like: var barButtonItem = self.navigationItem.rightBarButtonItem! var buttonItemView = barButtonItem

Just curious, why setting self.navigationItem = ... works, but self.navigationController.navigationItem fails? The same applies for self.toolbarItems vs self.navigationController.toobarItems . When to use self.navigationController.navigationItem ? Maybe you will say, they point to different things. but why self.navigationController.navigationBarHidden = YES the navigation bar is hidden. doesn't it means self.navigationController.navigationItem point to the bar i wanted? The class UIViewController has a property navigationItem . This is true of all the subclasses too whether it is a

I have customized the UINavigationBar's height to 100px and I'd like to add buttons onto this customized bar. All is good except the button seems to want to sit on the bottom of the nav bar no matter what. I can't get it to align to the center or the top of the nav bar. Here is the code; first I create a navigation controller in the app delegate and add one button on the right. // set main navigation controller temp *tempc = [[temp alloc] initWithNibName:@"temp" bundle:nil]; self.navigationController = [[UINavigationController alloc] initWithRootViewController:tempc]; UIBarButtonItem *navItem

I am creating a UIBarButtonItem and adding it to my navigation bar like so: (void)viewDidLoad { ... // Add the refresh button to the navigation bar UIButton *refreshButton = [UIButton buttonWithType:UIButtonTypeCustom]; [refreshButton setFrame:CGRectMake(0,0,30,30)]; [refreshButton setImage:[UIImage imageNamed:@"G_refresh_icon.png"] forState:UIControlStateNormal]; [refreshButton addTarget:self action:@selector(refreshData) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *refreshBarButton = [[[UIBarButtonItem alloc] initWithCustomView:refreshButton] autorelease]; self

I've added a navigation bar to a UIViewController. It is displayed from another UIViewController only. I'd like to have a left side back button that is shaped similar to an arrow, just like the normal navigation bar back button. It seems I can only add a bar button through IB. I'm guessing the back button needs to be added programmatically. Any suggestions on how I should do this? Currently, in the RootController, I push another UIViewController (viewB) by simply doing an addSubView. In viewB, I want to display the navigation bar. The app is view based, not navigation controller based. If you

I got the opposite issue from here . By default in iOS7 , back swipe gesture of UINavigationController 's stack could pop the presented ViewController . Now I just uniformed all the self.navigationItem.leftBarButtonItem style for all the ViewControllers . Here is the code: self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:LOADIMAGE(@"back_button") style:UIBarButtonItemStylePlain target:self action:@selector(popCurrentViewController)]; after that, the navigationController.interactivePopGestureRecognizer is disabled. How could I make the pop gesture enabled without

I have pushed a view onto the navigation controller and when I press the back button it goes to the previous view automatically. I want to do a few things when back button is pressed before popping the view off the stack. Which is the back button callback function? ymutlu William Jockusch's answer solve this problem with easy trick. -(void) viewWillDisappear:(BOOL)animated { if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) { // back button was pressed. We know this is true because self is no longer // in the navigation stack. } [super viewWillDisappear:animated];