如何在Swift 3中向Request中添加NSMutableData类型的主体？

Question

这是我的代码摘录：

let body:NSMutableString = NSMutableString()

body.appendFormat("\(MPboundary)\r\n" as NSString)
body.appendFormat("Content-Disposition: form-data; name=\"\notifications\"\r\n\r\n")
body.appendFormat("\(jsonString)\r\n\n" as NSString)

let end:String = "\(endMPboundary)"

let myRequestData:NSMutableData = NSMutableData()
myRequestData.append(body.data(using: String.Encoding.utf8.rawValue)!)
myRequestData.append(end.data(using: String.Encoding.utf8)!)

request.httpBody = myRequestData as Data

该行：

request.httpBody = myRequestData as Data

给出错误“无法将'NSMutableData'类型的值转换为强制类型'数据'”

Answer 1

受到评论的启发，这是一个原生的 Swift （3）版本：

var body = ""

body += "\(MPboundary)\r\n"
body += "Content-Disposition: form-data; name=\"\notifications\"\r\n\r\n"
body += "\(jsonString)\r\n\n"

let end = "\(endMPboundary)"

var myRequestData = Data()
myRequestData.append(body.data(using: .utf8)!)
myRequestData.append(end.data(using: .utf8)!)

request.httpBody = myRequestData

或更简单：

var body = ""

body += "\(MPboundary)\r\n"
body += "Content-Disposition: form-data; name=\"\notifications\"\r\n\r\n"
body += "\(jsonString)\r\n\n"
body += "\(endMPboundary)"

request.httpBody = body.data(using:.utf8)!