javascript - 如何在 Swift 中创建 Javascript 安全字符串？

Question

评估 Javascript 时，例如:

self.evaluateJavaScript("window.messenger.sendMessage('\(message)');

如何确保消息是 String 类型，可以安全地传递到此方法中？我可以想象引用或换行符已经把事情搞砸了。

Answer 1

extension String {
    var javaScriptString: String {
        var safeString  = self as NSString

        safeString      = safeString.stringByReplacingOccurrencesOfString("\\", withString: "\\\\")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\"", withString: "\\\"")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\'", withString: "\\\'")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\n", withString: "\\n")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\r", withString: "\\r")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\t", withString: "\\t")

        safeString      = safeString.stringByReplacingOccurrencesOfString("\u{0085}", withString: "\\u{0085}")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\u{2028}", withString: "\\u{2028}")
        safeString      = safeString.stringByReplacingOccurrencesOfString("\u{2029}", withString: "\\u{2029}")

        return safeString as String
    }
}