Swift 如何在URL中使用特殊字符\n

我有一个发帖请求：

init (url: String,arg: String) {
    self.responseString = nil
    var request = URLRequest(url: URL(string: url)!)
    request.httpMethod = "POST"
    let postString = arg
    request.httpBody = postString.data(using: .utf8)
    let task = URLSession.shared.dataTask(with: request) {
        data, response, error in
        guard let data = data, error == nil else {                                                 
            print("error=\(error)")
            self.responseString = nil
            return
        }
        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {           //
            self.responseString = nil
        } else {
        self.responseString = String(data: data, encoding: .utf8)
        }
    }
    task.resume()
    }

当arg有字符\n时，一半arg文本丢失。如何解决这个问题

strUrl = strUrl.addingPercentEncoding(withAllowedCharacters: CharacterSet.urlQueryAllowed)!

let url = URL.init(string: strUrl)

let requestURL = URLRequest(url: url!)

• 您需要添加addingPercentEncoding（withAllowedCharacters:CharacterSet.UrlQueryLowed）方法以允许URL查询

• 您需要添加addingPercentEncoding（withAllowedCharacters:CharacterSet.UrlQueryLowed）方法以允许URL查询

---

我看不出换行符在URL字符串中有何意义，但通常可以对URL字符串进行百分比转义：

let ecaped=urlString.addingPercentEncoding（withAllowedCharacters:.urlHostAllowed）

。我看不到换行符在URL字符串中有何意义，但一般来说，您可以对url字符串进行百分比转义：

let ecaped=urlString.addingPercentEncoding（使用AllowedCharacters:.urlHostAllowed）

。