在 Swift 中快速转义 unicode 字符

Question

如何快速转义 Swift Strings 中的 unicode 字符？现在，我有一个字符串数组，为了使其更易于用户阅读，我添加了以下代码来循环数组中的每个字符串

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for i in 0...(titles.count - 1) {\n    var s = titles[i]\n    s = s.stringByReplacingOccurrencesOfString(""", withString: "\\"")\n    s = s.stringByReplacingOccurrencesOfString("&", withString: "&")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00e1", withString: "\\u{00e1}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00e9", withString: "\\u{00e9}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00e8", withString: "\\u{00e8}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00e0", withString: "\\u{00e0}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00d8", withString: "\\u{00d8}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00c3", withString: "\\u{00c3}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00a4", withString: "\\u{00a4}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00eb", withString: "\\u{00eb}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u2022", withString: "\\u{2022}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00c9", withString: "\\u{00c9}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00b3", withString: "\\u{00b3}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u2019", withString: "\\u{2019}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u2730", withString: "\\u{2730}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u266b", withString: "\\u{266b}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\u00f8", withString: "\\u{00f8}")\n    s = s.stringByReplacingOccurrencesOfString("\\\\/", withString: "/")\n    titles[i] = s\n}\n

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例如，在第五行，任何出现的 都\\u00e1将替换为相应的 unicode 字符\xc3\xa1。

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字符串数组是使用以下命令生成的：

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myHTMLString = try NSString(contentsOfURL: url, encoding: NSUTF8StringEncoding)\n

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在哪里url = NSURL(string: "http://songa.nl/ajax.php?params=playlist/load/US87OmpN")!

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当遇到“时，将字符串拆分为不同的子字符串。

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是否有一种更少的 hack-y（并且可能更快）、更通用的方法来转义 unicode 字符？

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Answer 1

根据 Kerrek 的评论，并搜索“unes​​cape”而不是“resolve”，以下几行解决了我的问题：

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let transform = "Any-Hex/Java"\nlet input = "\\\\u5404\\\\u500b\\\\u90fd" as NSString\nvar convertedString = input.mutableCopy() as NSMutableString\n\nCFStringTransform(convertedString, nil, transform as NSString, 1)\n\nprintln("convertedString: \\(convertedString)")\n// convertedString: \xe5\x90\x84\xe5\x80\x8b\xe9\x83\xbd\n

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从：Using Swift to unescape unicode strings, ie \\u1234

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