Can't Set Titleview in the Center of Navigation Bar Because Back Button

Can't set titleView in the center of navigation bar because back button

UINavigationBar automatically centers its titleView as long as there is enough room. If the title isn't centered that means that the title view is too wide to be centered, and if you set the backgroundColor if your UIImageView you'll see that's exactly what is happening.

The title view is too wide because that navigation bar will automatically resize the title to hold its content, using -sizeThatFits:. This means that your title view will always be resized to the size of your image.

Two possible fixes:

1. The image you're using is way too big. Use a properly sized 44x44 pt image with 2x and 3x versions.

2. Wrap UIImageView inside of a regular UIView to avoid resizing.

Example:

UIImageView* imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"test.jpeg"]];
imageView.contentMode = UIViewContentModeScaleAspectFit;

UIView* titleView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
imageView.frame = titleView.bounds;
[titleView addSubview:imageView];

self.navigationItem.titleView = titleView;

Can't set titleView in Navigation bar center and scope of back button increased

Back button is picking its size according to the title of previous viewController. you can change it to a empty String for example, in your previous viewController from where you are pushing write this code.

self.navigationItem.backBarButtonItem =
[[UIBarButtonItem alloc] initWithTitle:@""
        style:UIBarButtonItemStylePlain
       target:nil
       action:nil];

How to change the size of titleView in navigation bar. Because there's a gap between titleView and backButton in navigationBar

override func viewDidLoad() {
    super.viewDidLoad()

    let container = UIView(frame: CGRect(x: 0, y: 0, width: 1000, height: 22))

    let searchBar = UISearchBar()
    searchBar.translatesAutoresizingMaskIntoConstraints = false
    container.addSubview(searchBar)

    let leftButtonWidth: CGFloat = 35 // left padding
    let rightButtonWidth: CGFloat = 75 // right padding
    let width = view.frame.width - leftButtonWidth - rightButtonWidth
    let offset = (rightButtonWidth - leftButtonWidth) / 2

    NSLayoutConstraint.activate([
        searchBar.topAnchor.constraint(equalTo: container.topAnchor),
        searchBar.bottomAnchor.constraint(equalTo: container.bottomAnchor),
        searchBar.centerXAnchor.constraint(equalTo: container.centerXAnchor, constant: -offset),
        searchBar.widthAnchor.constraint(equalToConstant: width)
    ])

    self.navigationItem.titleView = container
}

iOS Navgation bar title not in center?

If you using default Back Button on Navigation bar,add my working code to previous viewController while pushing to nextViewController

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];

And then add title to navigation bar on nextViewController viewDidLoad: method

[self.navigationItem setTitle:NSLocalizedString(@"Restaurants", nil)];

Handle back button action event from nextViewController like this,

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"G_Back", nil) style:UIBarButtonItemStylePlain target:nil action:@selector(actionToBackBtnFromDetail:)];

Can't centre title text in a navigation bar

This may happen because there may be some other view like leftBarButton, backButton or rightBarButton which causing this issue. Actually you are creating label of width 320.0f which is the complete width of navigation bar. You need to deduct the size of other views of navigation bar from you label width and it will work for you.

UINavigationItem centering the title

You can't do what you want directly -- the position of your title view is out of your control (when managed by UINavigationBar).

However, there are at least two strategies to get the effect you want:

1) Add the title view not as the 'proper' title view of the nav bar, but as a subview of the UINavigationBar. (Note: this is not 'officially' sanctioned, but I've seen it done, and work. Obviously you have to watch out for your title label overwriting bits of the buttons, and handle different size nav bars for different orientations, etc. -- a bit fiddly.)

2) Make an intelligent UIView subclass that displays a given subview (which would be your UILabel) at a position calculated to effectively show the subview perfectly centered on the screen. In order to do this, your intelligent UIView subclass would respond to layout events (or frame property changes etc.) by changing the position (frame) of the label subview.

Personally, I like the idea of approach 2) the best.

How to set UIViewController to be shown on back button of Navigation bar?

You can manipulate the viewControllers property of UINavigationController object to remove a particular object from stack. So when you are taking the route of ViewController -> LoginViewController-> CartViewController, then you should remove the LoginViewController object from the stack. That way when you pop from CartViewController you will be back to ViewController.

Check This Question for how to manipulate navigation controller stack

Custom behavior when back button in nav bar pressed

The following are the possibilities for a View Controller to disappear.

1. Clicking on a button (other than backBarButtonItem).
2. Clicking on the backBarButtonItem

Either case viewWillDisappear: method will be called. Keep a boolean flag. Lets name it isAnyButtonClicked. And set isAnyButtonClicked = YES whenever any button is clicked. And override the viewWillDisappear: method, and play the sound if no button is clicked(ie., isAnyButtonClicked == NO). Probably your viewWillDisappear: would look like,

- (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:animated];

    if (!isAnyButtonClicked) {

        // Play sound
        isAnyButtonClicked = NO;
    }
}

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