how to use form data in Alamofire - swift

Question

In the postman in the body section in the form-data part when I pass a mobile number as a key and mobile number as Int value I get a response. But when I did it in the code I will not get the response as expected.
my code is
func fetchRegisterData(){
let url = registerApi
var mobileNumber = mobilenumberTextfield.text
let parameters = ["mobile" : mobileNumber] as [String : Any]
AF.request(url,method: .post, parameters: parameters, encoding:JSONEncoding.default).responseJSON
{ response in switch response.result {
case .success(let JSON):
print("response is :\(response)")
case .failure(_):
print("fail")
}
}
}

Answer 1

If you're trying to pass parameters as multipart/form-data you have to use the upload method in Alamofire:
func fetchRegisterData() {
let parameters = ["mobile": mobilenumberTextfield.text!]
AF.upload(multipartFormData: { (multiFormData) in
for (key, value) in parameters {
multiFormData.append(Data(value.utf8), withName: key)
}
}, to: registerApi).responseJSON { response in
switch response.result {
case .success(let JSON):
print("response is :\(response)")
case .failure(_):
print("fail")
}
}
}

Answer 2

For normal Alamofire request -
While passing values as a parameter in Alamofire Request. You need to know about the data type of the request type values which is valid for API.
At API end, these values are getting parsed based on some data types. There must be some validations on the data type at the API side.
for mobileNumber, it can be either Int or String
1 - let parameters = ["mobile" : mobileNumber] as [String : Int]
2 - let parameters = ["mobile" : mobileNumber] as [String : String]
For multipart form data request use have to use something like below. However, if you are not uploading anything you should not use it. Ask API team to make changes in the API and normal parameters request
Alamofire.upload(multipartFormData: { (multipartFormData) in
//Try this
multipartFormData.append(mobileNumber, withName: "mobile")
//or this
multipartFormData.append("\(String(describing: mobileNumber))".data(using: .utf8)!, withName: "mobile")
}, usingThreshold: 10 * 1024 * 1024, to: apiUrl, method: .post, headers: [:], encodingCompletion: { (encodingResult) in
switch encodingResult {
case .success(let upload, _, _):
case .failure( _):
}
})