iOS 使用TTF字体#

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let familyNames = UIFont.familyNames
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        for familyName in familyNames {
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            print("++++++ " + familyName + " ++++++")
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            let fontNames = UIFont.fontNames(forFamilyName: familyName)
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            for fontName in fontNames {
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                print(fontName)
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            }
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            print("=================================")
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        }
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        return UIFont(name: "hahahahahaah", size: fontSize)!