30

我想在 Cocoapod 中使用自定义字体,但在静态库中使用自定义字体时找不到任何内容。由于没有 info.plist 文件,因此无法告诉应用程序使用什么字体。

有任何想法吗?

4

5 回答 5

16

有一种方法可以在不向 plist 文件中添加任何内容的情况下使用自定义字体。

    NSBundle *bundle = [NSBundle bundleForClass:[self class]];
    NSURL *fontURL = [bundle URLForResource:<#fontName#> withExtension:@"otf"/*or TTF*/];
    NSData *inData = [NSData dataWithContentsOfURL:fontURL];
    CFErrorRef error;
    CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)inData);
    CGFontRef font = CGFontCreateWithDataProvider(provider);
    if (!CTFontManagerRegisterGraphicsFont(font, &error)) {
        CFStringRef errorDescription = CFErrorCopyDescription(error);
        NSLog(@"Failed to load font: %@", errorDescription);
        CFRelease(errorDescription);
    }
    CFSafeRelease(font);
    CFSafeRelease(provider);

您还需要该CFSafeRelease功能才能正常工作。

void CFSafeRelease(CFTypeRef cf) {
    if (cf != NULL) {
        CFRelease(cf);
    }
}

来源:动态加载 iOS 字体

斯威夫特等效:

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
    }
}
于 2016-04-26T16:48:21.180 回答
12

如果我理解正确,您正在尝试为您的 Cocoapod 提供一种字体,并且您希望包含该 pod 的 iOS 应用程序能够使用您的自定义字体。

这个post_install钩子似乎有效:

Pod::Spec.new do |s|
  # ...
  s.resources = "Resources/*.otf"
  # ...
  s.post_install do |library_representation|
    require 'rexml/document'

    library = library_representation.library
    proj_path = library.user_project_path
    proj = Xcodeproj::Project.new(proj_path)
    target = proj.targets.first # good guess for simple projects

    info_plists = target.build_configurations.inject([]) do |memo, item|
      memo << item.build_settings['INFOPLIST_FILE']
    end.uniq
    info_plists = info_plists.map { |plist| File.join(File.dirname(proj_path), plist) }

    resources = library.file_accessors.collect(&:resources).flatten
    fonts = resources.find_all { |file| File.extname(file) == '.otf' || File.extname(file) == '.ttf' }
    fonts = fonts.map { |f| File.basename(f) }

    info_plists.each do |plist|
      doc = REXML::Document.new(File.open(plist))
      main_dict = doc.elements["plist"].elements["dict"]
      app_fonts = main_dict.get_elements("key[text()='UIAppFonts']").first
      if app_fonts.nil?
        elem = REXML::Element.new 'key'
        elem.text = 'UIAppFonts'
        main_dict.add_element(elem)
        font_array = REXML::Element.new 'array'
        main_dict.add_element(font_array)
      else
        font_array = app_fonts.next_element
      end

      fonts.each do |font|
        if font_array.get_elements("string[text()='#{font}']").empty?
          font_elem = REXML::Element.new 'string'
          font_elem.text = font
          font_array.add_element(font_elem)
        end
      end

      doc.write(File.open(plist, 'wb'))
    end
  end

钩子找到用户项目,并在第一个目标中(您可能可以通过要求 CocoaPods 给您真正的目标来完成此解决方案)它会查找其Info.plist文件(通常只有一个)。最后,它查找UIAppFonts文件的键,如果没有找到就创建它,如果字体名称不存在,则用字体名称填充数组。

于 2013-06-08T01:51:50.990 回答
11

对于那些在 2018+ 年发现这一点的人,我通过以下两个步骤获得了自定义字体以与界面构建器支持 (XCode 9) 一起使用:

  1. 将字体添加到框架的资源包中(在 .podspec 文件中)

    s.resources = "PodName/**/*.{ttf}"
    
  2. 使用上面亚当的答案在运行时加载字体

    #import <CoreText/CoreText.h>
    
    void CFSafeRelease(CFTypeRef cf) { // redefine this
      if (cf != NULL) {
        CFRelease(cf);
      }
    }
    
    
    + (void) loadFonts {
      NSBundle *frameworkBundle = [NSBundle bundleForClass:self.classForCoder];
      NSURL *bundleURL = [[frameworkBundle resourceURL] URLByAppendingPathComponent:@"PodName.bundle"];
      NSBundle *bundle = [NSBundle bundleWithURL:bundleURL];
    
      NSURL *fontURL = [bundle URLForResource:@"HindMadurai-SemiBold" withExtension:@"ttf"];
      NSData *inData = [NSData dataWithContentsOfURL:fontURL];
      CFErrorRef error;
      CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)inData);
      CGFontRef font = CGFontCreateWithDataProvider(provider);
      if (!CTFontManagerRegisterGraphicsFont(font, &error)) {
          CFStringRef errorDescription = CFErrorCopyDescription(error);
          NSLog(@"Failed to load font: %@", errorDescription);
          CFRelease(errorDescription);
      }
      CFSafeRelease(font);
      CFSafeRelease(provider);
    }
    
  3. 运行 pod 安装

于 2018-03-06T23:06:30.820 回答
4

斯威夫特 5 实施

我可以通过在我的 Cocoapod 中创建以下类来解决这个问题,然后只需CustomFonts.loadAll()从我的主应用程序的AppDelegate.swift. 之后,我可以在我的应用程序中使用这样的字体:

let myFont = CustomFonts.Style.regular.font

请注意,Style枚举不是必需的,它只是一种方便的分离关注点的方法。您也可以致电:

let myFont = UIFont(name: "SourceSansPro-SemiBold", size: 14)

import CoreText

public class CustomFonts: NSObject {

  public enum Style: CaseIterable {
    case mono
    case regular
    case semibold
    public var value: String {
      switch self {
      case .mono: return "SourceCodePro-Medium"
      case .regular: return "SourceSansPro-Regular"
      case .semibold: return "SourceSansPro-SemiBold"
      }
    }
    public var font: UIFont {
      return UIFont(name: self.value, size: 14) ?? UIFont.init()
    }
  }

  // Lazy var instead of method so it's only ever called once per app session.
  public static var loadFonts: () -> Void = {
    let fontNames = Style.allCases.map { $0.value }
    for fontName in fontNames {
      loadFont(withName: fontName)
    }
    return {}
  }()

  private static func loadFont(withName fontName: String) {
    guard
      let bundleURL = Bundle(for: self).url(forResource: "[CococpodName]", withExtension: "bundle"),
      let bundle = Bundle(url: bundleURL),
      let fontURL = bundle.url(forResource: fontName, withExtension: "ttf"),
      let fontData = try? Data(contentsOf: fontURL) as CFData,
      let provider = CGDataProvider(data: fontData),
      let font = CGFont(provider) else {
        return
    }
    CTFontManagerRegisterGraphicsFont(font, nil)
  }

}
于 2019-08-23T21:06:47.130 回答
1

好吧,idk 是否可以作为答案,但您也可以查看需要字体的 cocoapod,如下所示: https ://github.com/parakeety/GoogleFontsiOS

库包含许多字体,我需要 Chivo,所以我添加了 pod 'GoogleFontsiOS/Chivo' 并使用它而不是自己编写字体加载代码。

于 2019-03-06T11:09:01.927 回答