Swift 2.0 转义字符串换行（字符串编码）

Question

我正在尝试转义字符串以换行，即 \n。例如，假设字符串是：-

First Line Of String
second Line of String
Third Line of String

现在如果我使用字符串扩展并说

func escapeString() -> String{
newString =   self.stringByRemovingPercentEncoding
return newString
}

这个扩展没有给我 newString 作为

First Line Of String\nSecond Line Of String\nThird Line Of String

我需要将上面的字符串作为 jsonString 传递给 server.ie 我必须对其进行字符串编码

Answer 1

雨燕5

您可以使用JSONEncoder转义 \n、\、\t、\r、'、" 等字符，而不是在字符串中手动替换它们，例如：

extension String {
    var escaped: String {
        if let data = try? JSONEncoder().encode(self) {
            let escaped = String(data: data, encoding: .utf8)!
            // Remove leading and trailing quotes
            let set = CharacterSet(charactersIn: "\"")
            return escaped.trimmingCharacters(in: set)
        }
        return self
    }
}

let str = "new line - \n, quote - \", url - https://google.com"
print("Original: \(str)")
print("Escaped: \(str.escaped)")

输出：

Original: new line - 
, quote - ", url - https://google.com
Escaped: new line - \n, quote - \", url - https:\/\/google.com