如何使用ios Swift 3从soap web服务方法中获取json数组字符串？

import Alamofire

func getJSONFromSOAPService() {
    let soapMessage = "<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:example=\"http://www.example.com/\"><SOAP-ENV:Body><example:GetData></example:GetData></SOAP-ENV:Body></SOAP-ENV:Envelope>"
    
    let headers: HTTPHeaders = [
        "Content-Type": "text/xml; charset=utf-8",
        "SOAPAction": "http://www.example.com/GetData"
    ]
    
    Alamofire.request("http://example.com/soap-service", method: .post, parameters: [:], encoding: soapMessage, headers: headers).responseString { response in
        switch response.result {
        case .success(let value):
            // 处理SOAP响应，提取JSON数组字符串
            if let jsonStartIndex = value.range(of: "{"),
               let jsonEndIndex = value.range(of: "}", options: .backwards) {
                let jsonString = value[jsonStartIndex.lowerBound...jsonEndIndex.upperBound]
                print(jsonString)
            }
        case .failure(let error):
            print(error)
        }
    }
}