我设法使用 SPM 导入自定义字体，使用这个 SO 答案来帮助https://stackoverflow.com/a/36871032/5508175
这就是我所做的。创建你的包并添加你的字体。这是我的Package.swift
// swift-tools-version:5.3
// The swift-tools-version declares the minimum version of Swift required to build this package.
import PackageDescription
let package = Package(
name: "MyFonts",
products: [
.library(
name: "MyFonts",
targets: ["MyFonts"]),
],
dependencies: [
],
targets: [
.target(
name: "MyFonts",
dependencies: [],
resources: [.process("Fonts")]),
.testTarget(
name: "MyFontsTests",
dependencies: ["MyFonts"]),
]
)
这是我的文件夹结构。我的所有字体都包含在一个名为 Fonts 的文件夹中。
在MyFonts.swift 内部，我执行以下操作：
import Foundation // This is important remember to import Foundation
public let fontBundle = Bundle.module
这允许我访问包外的 Bundle。
接下来我将包添加到我的项目中。这是一个带有 AppDelegate 的 SwiftUI 项目。
- 导入我的字体
- 在
didFinishLaunchingWithOptions 中检查字体文件是否可用（可选）
- 使用 UIFont 的扩展名添加字体。
- 打印字体以检查它们是否已安装（可选）
这是我的 AppDelegate：
import UIKit
import MyFonts
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// This prints out the files that are stored in the MyFont bundle
// Just doing this to check that the fonts are actually in the bundle
if let files = try? FileManager.default.contentsOfDirectory(atPath: fontBundle.bundlePath ){
for file in files {
print(file)
}
}
// This registers the fonts
_ = UIFont.registerFont(bundle: fontBundle, fontName: "FiraCode-Medium", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: fontBundle, fontName: "FiraCode-Bold", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: fontBundle, fontName: "FiraCode-Light", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: fontBundle, fontName: "FiraCode-Regular", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: fontBundle, fontName: "FiraCode-Retina", fontExtension: "ttf")
// This prints out all the fonts available you should notice that your custom font appears in this list
for family in UIFont.familyNames.sorted() {
let names = UIFont.fontNames(forFamilyName: family)
print("Family: \(family) Font names: \(names)")
}
return true
}
// MARK: UISceneSession Lifecycle
func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
}
func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {}
}
// This extension is taken from this SO answer https://stackoverflow.com/a/36871032/5508175
extension UIFont {
static func registerFont(bundle: Bundle, fontName: String, fontExtension: String) -> Bool {
guard let fontURL = bundle.url(forResource: fontName, withExtension: fontExtension) else {
fatalError("Couldn't find font \(fontName)")
}
guard let fontDataProvider = CGDataProvider(url: fontURL as CFURL) else {
fatalError("Couldn't load data from the font \(fontName)")
}
guard let font = CGFont(fontDataProvider) else {
fatalError("Couldn't create font from data")
}
var error: Unmanaged<CFError>?
let success = CTFontManagerRegisterGraphicsFont(font, &error)
guard success else {
print("Error registering font: maybe it was already registered.")
return false
}
return true
}
}
那么在你ContentView 中你可以做这样的事情：
import SwiftUI
struct ContentView: View {
var body: some View {
VStack(spacing: 20) {
Text("Hello San Francisco")
Text("Hello FiraCode Medium").font(Font.custom("FiraCode-Medium", size: 16))
Text("Hello FiraCode Bold").font(Font.custom("FiraCode-Bold", size: 16))
Text("Hello FiraCode Light").font(Font.custom("FiraCode-Light", size: 16))
Text("Hello FiraCode Regular").font(Font.custom("FiraCode-Regular", size: 16))
Text("Hello FiraCode Retina").font(Font.custom("FiraCode-Retina", size: 16))
}
}
}
结果如下：
注意事项
我还没有在完整的 SwiftUI 应用程序中尝试过这个，但是如果你没有 AppDelegate，你可以按照here 显示的教程来了解如何添加 AppDelegate。
显然fontBundle 中文件的打印和安装的字体是可选的。它们只是用于调试和确保您拥有正确的字体名称文件名可能与您必须用于显示字体的字体名称有很大不同。请参阅我的 SO post 关于添加自定义字体：
更新
我想知道是否可以创建一个包含在包中的函数并调用它来加载字体。显然是的。
我将MyFonts.swift更新为以下内容：
import Foundation
import UIKit
public func registerFonts() {
_ = UIFont.registerFont(bundle: .module, fontName: "FiraCode-Medium", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: .module, fontName: "FiraCode-Bold", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: .module, fontName: "FiraCode-Light", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: .module, fontName: "FiraCode-Regular", fontExtension: "ttf")
_ = UIFont.registerFont(bundle: .module, fontName: "FiraCode-Retina", fontExtension: "ttf")
}
extension UIFont {
static func registerFont(bundle: Bundle, fontName: String, fontExtension: String) -> Bool {
guard let fontURL = bundle.url(forResource: fontName, withExtension: fontExtension) else {
fatalError("Couldn't find font \(fontName)")
}
guard let fontDataProvider = CGDataProvider(url: fontURL as CFURL) else {
fatalError("Couldn't load data from the font \(fontName)")
}
guard let font = CGFont(fontDataProvider) else {
fatalError("Couldn't create font from data")
}
var error: Unmanaged<CFError>?
let success = CTFontManagerRegisterGraphicsFont(font, &error)
guard success else {
print("Error registering font: maybe it was already registered.")
return false
}
return true
}
}
这意味着我可以从 AppDelegate 中删除扩展名，并且不必像调用 registerFonts() 之前那样在 AppDelegate 中注册每种字体
所以我的didFinishLaunchingWithOptions 现在看起来像这样：
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// This registers the fonts
registerFonts()
return true
}
记住你仍然需要导入你的包。