how to append String Array to form data - ios

Question

I want to send file with other parameters.I was able to send that using alamofire upload.but the question is in my parameters i have String arrays.I dont know how to append them in to form data.
let parameters = ["comments":comments!,
"title":title!,
"publish_date":publish_date,
"expiry_date":expiry_date,
"visibility[staff]":"N",
"visibility[students][Forms]":["1","2"]
]
]
as [String : Any]
let headers = [
"Content-type": "multipart/form-data"
]
let URL_head = try! URLRequest(url: STAFF_SERVICE_URL + "staff/2/news?api_key=\(api_key)", method: .post, headers: headers)
Alamofire.upload(multipartFormData: { (multipartFormData) in
if let url = fileUrl{
multipartFormData.append(url, withName: "file")
}
for (key, value) in parameters {
multipartFormData.append("\(value)".data(using: String.Encoding.utf8)!, withName: key as String)
}
print(multipartFormData)
}, with:URL_head)
{ (result) in
switch result {
case .success(let upload, _, _):
upload.responseJSON { response in
NSLog("Upload response \(response)")
if let jsonValue = response.result.value {
_ = JSON(jsonValue)
completion(true ,"Suucess")
}else{
completion(false ,"Error")
}
}
case .failure(let encodingError):
print("fail \(encodingError)")
NSLog("Error \(result)")
completion(false ,"No Internet")
}
}
}
i tried to encode array seperately like this.but not worked.
let data = try! JSONSerialization.data(withJSONObject: array,
options:.prettyPrinted)
let jsonString = String(data: data, encoding: .utf8)!

Answer 1

You can directly pass data object you don't need to convert back to string
for example
for (key, value) in parameters {
if checkIfItIsArray {
// Make sure you handle error here
let data = try! JSONSerialization.data(withJSONObject: array, options:nil)
multipartFormData.append(data, withName: key as String)
} else {
multipartFormData.append("\(value)".data(using: String.Encoding.utf8)!, withName: key as String)
}
}