How to set multi line Large title in navigation ba

问题:

I am in process of adding large title in navigation bar in one of the application. The issue is title is little long so I will require to add two lines in large title. How can I add large title with two lines in navigation bar ?

This is not about default navigation bar title ! This is about large title which is introduced in iOS 11 . So make sure you add suggestions by considering large title. Thanks

回答1:

Get a navigation item subviews and locate UILabel from it.

Try this and see:

self.navigationController?.navigationBar.prefersLargeTitles = true
self.navigationController?.navigationItem.largeTitleDisplayMode = .automatic

self.title = "This is multiline title for navigation bar"
self.navigationController?.navigationBar.largeTitleTextAttributes = [                     
                                NSAttributedStringKey.foregroundColor: UIColor.black,
                                NSAttributedStringKey.font : UIFont.preferredFont(forTextStyle: .largeTitle)
                                ]

for navItem in(self.navigationController?.navigationBar.subviews)! {
     for itemSubView in navItem.subviews { 
         if let largeLabel = itemSubView as? UILabel {
             largeLabel.text = self.title
             largeLabel.numberOfLines = 0
             largeLabel.lineBreakMode = .byWordWrapping
         }
     }
}

Here is result:

回答2:

Based in @krunal answer, this is working for me:

extension UIViewController {

func setupNavigationMultilineTitle() {
    guard let navigationBar = self.navigationController?.navigationBar else { return }
    for sview in navigationBar.subviews {
        for ssview in sview.subviews {
            guard let label = ssview as? UILabel else { break }
            if label.text == self.title {
                label.numberOfLines = 0
                label.lineBreakMode = .byWordWrapping
                label.sizeToFit()
                UIView.animate(withDuration: 0.3, animations: {
                    navigationBar.frame.size.height = 57 + label.frame.height
                })
            }
        }
    }
}
}

In the UIViewController:

override func viewDidLoad() {
    super.viewDidLoad()
    self.title = "This is a multiline title"
    setupNavigationMultilineTitle()
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    setupNavigationMultilineTitle()
}

And for setting font and color on the large title:

navigation.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor: .red, NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 30)]

回答3:

Here you can add a multiline UILabel in the NavigationTitle, You can do it by some kind of customisation in your code and put the UILabel on self.navigationItem.titleView

    let label = UILabel()
    label.backgroundColor = .clear
    label.numberOfLines = 2
    label.font = UIFont.boldSystemFont(ofSize: 16.0)
    label.textAlignment = .center
    label.textColor = .black
    label.text = "JUV vs LFC\nUEFA Championship"
    self.navigationItem.titleView = label

Cheers have a good day.

回答4:

To set a multi-line large title in the Navigation Bar, do the following:

Step 1: Add your title to the Navigation Bar via the StoryBoard.

Step 2: Go to your ViewController file and add the following line under viewDidLoad() method

self.navigationController?.navigationBar.prefersLargeTitles = true