let json = try JSONSerialization.jsonObject(with: data, options: []) as! NSDictionary

let request = PayReq()

request.nonceStr = json.object(forKey: "noncestr") as! String

request.package = json.object(forKey: "package") as! String

request.partnerId = json.object(forKey: "partnerid") as! String

request.prepayId = json.object(forKey: "prepayid") as! String

request.timeStamp = UInt32((json.object(forKey: "timestamp") as! NSString).intValue)

request.sign = json.object(forKey: "sign") as! String

WXApi.send(request)

执行到最后一步时就会出现以下情况。