ios - 从 UIFont 或 CGFont 获取元信息 - iOS、Swift

Question

我想从字体获取元信息。例如:支持的语言、版本、许可证等。我该怎么做？它在 Mac 字体应用程序上运行良好。我需要在 iOS 上实现这个。

Answer 1

您可以使用CTFontCopyName获取大部分信息。例如，您可以像这样打印字体的版权和许可证:

print(CTFontCopyName(font, kCTFontCopyrightNameKey))
print(CTFontCopyName(font, kCTFontLicenseNameKey))

关键常量的格式为kCTFont***NameKey，并在CTFont.h中声明。

您可以使用 CTFontCopySupportedLanguages 获取支持的语言，但您会获取 BCP-47 语言标识符列表:

import CoreText
import Foundation

let font = CTFontCreateWithName("Helvetica" as CFString, 12, nil)
let languageIds = CTFontCopySupportedLanguages(font) as! [String]
print(languageIds.joined(separator: ", "))

// Output:

af, agq, ak, asa, ast, az, bas, be, bem, bez, bg, bm, br, bs, ca, ce, cgg, cs, cy, da, dav, de, dje, dsb, dyo, ebu, el, en, eo, es, et, eu, ewo, fi, fil, fo, fr, fur, fy, ga, gd, gl, gsw, guz, gv, haw, hr, hsb, hu, id, ig, is, it, jmc, ka, kam, kde, kea, khq, ki, kk, kl, kln, ksb, ksf, ksh, kw, lag, lb, lg, lkt, ln, lt, lu, luo, luy, lv, mas, mer, mfe, mg, mgh, mgo, mk, mn, ms, mt, naq, nb, nd, nl, nmg, nn, nnh, nyn, om, os, pl, pt, qu, rm, rn, ro, rof, ru, rw, rwk, saq, sbp, se, seh, ses, sg, sk, sl, smn, sn, so, sq, sr, sv, sw, teo, tg, tk, to, tr, twq, uk, uz, vi, vun, wae, xog, yav, yo, zu

您可以使用区域设置将它们转换为人类可读的语言名称。您可能想使用用户选择的系统区域设置:

let myLocale = Locale.autoupdatingCurrent
let languageNames = languageIds.compactMap({ myLocale.localizedString(forLanguageCode: $0) })
print(languageNames.joined(separator: ", "))

// Output:

Afrikaans, Aghem, Akan, Asu, Asturian, Azerbaijani, Basaa, Belarusian, Bemba, Bena, Bulgarian, Bambara, Breton, Bosnian, Catalan, Chechen, Chiga, Czech, Welsh, Danish, Taita, German, Zarma, Lower Sorbian, Jola-Fonyi, Embu, Greek, English, Esperanto, Spanish, Estonian, Basque, Ewondo, Finnish, Filipino, Faroese, French, Friulian, Western Frisian, Irish, Scottish Gaelic, Galician, Swiss German, Gusii, Manx, Hawaiian, Croatian, Upper Sorbian, Hungarian, Indonesian, Igbo, Icelandic, Italian, Machame, Georgian, Kamba, Makonde, Kabuverdianu, Koyra Chiini, Kikuyu, Kazakh, Kalaallisut, Kalenjin, Shambala, Bafia, Colognian, Cornish, Langi, Luxembourgish, Ganda, Lakota, Lingala, Lithuanian, Luba-Katanga, Luo, Luyia, Latvian, Masai, Meru, Morisyen, Malagasy, Makhuwa-Meetto, Metaʼ, Macedonian, Mongolian, Malay, Maltese, Nama, Norwegian Bokmål, North Ndebele, Dutch, Kwasio, Norwegian Nynorsk, Ngiemboon, Nyankole, Oromo, Ossetic, Polish, Portuguese, Quechua, Romansh, Rundi, Romanian, Rombo, Russian, Kinyarwanda, Rwa, Samburu, Sangu, Northern Sami, Sena, Koyraboro Senni, Sango, Slovak, Slovenian, Inari Sami, Shona, Somali, Albanian, Serbian, Swedish, Swahili, Teso, Tajik, Turkmen, Tongan, Turkish, Tasawaq, Ukrainian, Uzbek, Vietnamese, Vunjo, Walser, Soga, Yangben, Yoruba, Zulu

我不知道如何获取字体支持的脚本。