如何更改iPad的导航项字体大小？

Question

I am able to change title font of Navigation Item in the storyboard but I did not see any option to change title font of navigation item for different widths so I did this in my viewDidLoad() to change the size of font

   if (UI_USER_INTERFACE_IDIOM() == .pad)
        {
      self.navigationController?.navigationBar.titleTextAttributes = [ NSFontAttributeName: UIFont(name: "HelveticaNeue", size: 54)!, NSForegroundColorAttributeName: UIColor.black]

}

What am I missing as I am not able to change font for regular width devices?

Answer 1

override func viewDidLoad() {
    super.viewDidLoad()

    if (UI_USER_INTERFACE_IDIOM() == .pad){
        let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 40))
        titleLabel.font = UIFont.systemFont(ofSize: 24);
        titleLabel.text = "Check my size"
        self.navigationItem.titleView = titleLabel
    }
}

Answer 2

First are you sure your device check is working?

I think UI_USER_INTERFACE_IDIOM() is Objective C. You should be using something like this to check the device idiom in swift

UIDevice.currentDevice().userInterfaceIdiom == .pad
UIDevice.currentDevice().userInterfaceIdiom == .phone
UIDevice.currentDevice().userInterfaceIdiom == .unspecified

Then modify the title font size like this

self.navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName:UIFont.systemFont(ofSize: 5.0)]

This should be enough to change the size of the nav bar title font size

Answer 3

You can try that : Device.swift

Use contains() to check that your device type name include "iPad". So, it will do for all iPad Devices

1. Drag UINavigationItem and put at your view controller navigation bar at storyboard.

2. Connect that UINavigationItem with the Outlet that is your code.

@IBOutlet weak var rightNavItem : UINavigationItem!

override func viewDidLoad() {
    super.viewDidLoad()

    guard let navController = self.navigationController else{
        print("Navigation Controller is nil")
        return
    }

    navController.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "HelveticaNeue", size: 25)!, NSForegroundColorAttributeName: UIColor.black]

    //This code is for rightbarbutton

    rightNavItem.rightBarButtonItem?.setTitleTextAttributes([NSFontAttributeName: UIFont(name: "HelveticaNeue", size: 10)!, NSForegroundColorAttributeName: UIColor.blue], for:.normal)

    //.selected or .normal or .disable
}

That's all I got for now. Other feedbacks are also welcome on customizing UINavigationItem. If I can find new one which is better than this, I will update here. Good Luck.

Here is the result :