string - 在 Swift 中快速转义 unicode 字符

Question

如何快速对 Swift 字符串中的 unicode 字符进行转义？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，循环遍历数组中的每个字符串

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

例如，在第五行，任何出现的 \u00e1 都被替换为相应的 unicode 字符 á。

字符串数组是使用以下方法生成的:

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

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

并在遇到 "时将字符串拆分为不同的子字符串。

是否有更简单(并且可能更快)和更通用的方法来对 unicode 字符进行转义？

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:

let transform = "Any-Hex/Java"
let input = "\\u5404\\u500b\\u90fd" as NSString
var convertedString = input.mutableCopy() as NSMutableString

CFStringTransform(convertedString, nil, transform as NSString, 1)

println("convertedString: \(convertedString)")
// convertedString: 各個都

见自:Using Swift to unescape unicode characters, ie \u1234