在Alamofire中发布Json字符串

Question

How to post a json string using Alamofire. Alamofire request takes only Dictionary type as parameter: [String : Any] . But I want to pass a json string as a parameter, not Dictionary.

Alamofire.request(url, method: .post, 
         parameters: [String : Any], // <-- takes dictionary !!
         encoding: JSONEncoding.default, headers: [:])

Answer 1

您正在使用encoding: JSONEncoding.default的形式和您的参数数据[String : Any]当你传递数据Alamofire编码您[String : Any]以json becuse你已经提到你的编码方法将JSONEncoding.default服务器将接收编码的JSON

Answer 2

The easiest way is to convert your json data to native dictionary and use it as intended:

func jsonToDictionary(from text: String) -> [String: Any]? {
    guard let data = text.data(using: .utf8) else { return nil }
    let anyResult = try? JSONSerialization.jsonObject(with: data, options: [])
    return anyResult as? [String: Any]
}

Usage:

var params = jsonToDictionary(from: json) ?? [String : Any]()
Alamofire.request(url, method: .post, parameters: params, encoding: JSONEncoding.default, headers: [:])

Answer 3

duplicate: POST request with a simple string in body with Alamofire

extension String: ParameterEncoding {

    public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
        var request = try urlRequest.asURLRequest()
        request.httpBody = data(using: .utf8, allowLossyConversion: false)
        return request
    }

}

Alamofire.request("http://mywebsite.com/post-request", method: .post, parameters: [:], encoding: "myBody", headers: [:])