Changing tab bar font in Swift

问题

I have been trying to change the font for the tab bar items however I haven't been able to find any Swift examples. I know that this is how you change it in Objective-C:

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont fontWithName:@"AmericanTypewriter" size:20.0f], UITextAttributeFont, nil] forState:UIControlStateNormal];

But how can I translate this into Swift?

回答1:

The UITextAttributeFont was deprecated in iOS 7. You should use the NS variant instead:

import UIKit

let appearance = UITabBarItem.appearance()
let attributes = [NSFontAttributeName:UIFont(name: "American Typewriter", size: 20)]
appearance.setTitleTextAttributes(attributes, forState: .Normal)

回答2:

Swift 4.2

UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont(name: "FontName", size: 10)!], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont(name: "FontName", size: 10)!], for: .selected)

Swift 4

UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.font: UIFont(name: "FontName", size: 10)!], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.font: UIFont(name: "FontName", size: 10)!], for: .selected)

Swift 3

UITabBarItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont(name: "Font-Name", size: 10)!], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont(name: "Font-Name", size: 10)!], for: .selected)

Note: Use setTitleTextAttributes for both .normal and .selected to have changes persist selection state changes.

回答3:

Put this under didFinishLaunchingWithOptions:

UITabBarItem.appearance()
    .setTitleTextAttributes(
        [NSAttributedStringKey.font: UIFont(name: "Didot", size: 10)!], 
    for: .normal)

This works in Swift 4

回答4:

In addition @Mc.Lover 's answer, If you want to aplly this change to all of your tab bar Items in application, I recommand to add the code in application function of AppDelegate class:

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    //Just add this line to get it done.       
    UITabBarItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont(name: "IranSansMobile", size: 15)!], for: UIControlState.normal)

    return true
}

回答5:

In Swift4 version, you can use attribute keys to set font and foreground color

UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor(hexString: "#D8FFE8"), NSAttributedStringKey.font : UIFont(name: "HelveticaNeue-Bold", size: 16) as Any], for: .normal)
    UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor(hexString: "#FFFFFF"),NSAttributedStringKey.font : UIFont(name: "HelveticaNeue-Bold", size: 16) as Any], for: .selected)

回答6:

Swift 4.2

    UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont(name: "BahijTheSansArabic-Plain", size: 10)!], for: .normal)
    UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont(name: "BahijTheSansArabic-Plain", size: 10)!], for: .selected)

回答7:

Swift 5

let appearance = UITabBarItem.appearance()
let attributes = [NSAttributedString.Key.font:UIFont(name: "American Typewriter", size: 20)]
appearance.setTitleTextAttributes(attributes as [NSAttributedString.Key : Any], for: .normal)

来源：https://stackoverflow.com/questions/26069334/changing-tab-bar-font-in-swift

标签

swift

uitabbar

uifont