在Swift中更改标签栏字体

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:

我一直在尝试更改标签栏项目的字体，但是我无法找到任何Swift示例。我知道这就是你在Objective-C中改变它的方式：

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

But how can I translate this into Swift?

但是我怎么能把它翻译成Swift呢？

5 个解决方案

#1

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

UITextAttributeFont在iOS 7中已弃用。您应该使用NS变体：

import UIKit

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

#2

Here is Swift 3.0 solution

这是Swift 3.0解决方案

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

#3

Put this under didFinishLaunchingWithOptions:

把它放在didFinishLaunchingWithOptions下：

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

This works in Swift 4

这适用于Swift 4

#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:

另外@ Mc.Lover的回答，如果你想对应用程序中的所有标签栏项目进行更改，我建议在AppDelegate类的应用程序功能中添加代码：

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
}

#5

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

在Swift4版本中，您可以使用属性键来设置字体和前景色

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)

#1