Swift - Send an array as POST request parameter to PHP - php

Question

I'm working on an app in Swift. I need to call PHP webservice from this app.
Below code for webservice:
// ViewController.swift
// SwiftPHPMySQL
//
// Created by Belal Khan on 12/08/16.
// Copyright © 2016 Belal Khan. All rights reserved.
//
import UIKit
class ViewController: UIViewController {
//URL to our web service
let URL_SAVE_TEAM = "http://192.168.1.103/MyWebService/api/createteam.php"
//TextFields declarations
#IBOutlet weak var textFieldName: UITextField!
#IBOutlet weak var textFieldMember: UITextField!
//Button action method
#IBAction func buttonSave(sender: UIButton) {
//created NSURL
let requestURL = NSURL(string: URL_SAVE_TEAM)
//creating NSMutableURLRequest
let request = NSMutableURLRequest(URL: requestURL!)
//setting the method to post
request.HTTPMethod = "POST"
//getting values from text fields
let teamName=textFieldName.text
let memberCount = textFieldMember.text
//creating the post parameter by concatenating the keys and values from text field
let postParameters = "name="+teamName!+"&member="+memberCount!;
//adding the parameters to request body
request.HTTPBody = postParameters.dataUsingEncoding(NSUTF8StringEncoding)
//creating a task to send the post request
let task = NSURLSession.sharedSession().dataTaskWithRequest(request){
data, response, error in
if error != nil{
print("error is \(error)")
return;
}
//parsing the response
do {
//converting resonse to NSDictionary
let myJSON = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary
//parsing the json
if let parseJSON = myJSON {
//creating a string
var msg : String!
//getting the json response
msg = parseJSON["message"] as! String?
//printing the response
print(msg)
}
} catch {
print(error)
}
}
//executing the task
task.resume()
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
I have this array:
let arr = ["aaa", "wassd", "wesdsd"]
Now I need to send this array as parameter like this:
let postParameters = "name="+teamName!+"&member="+memberCount!;
I've done this:
let postParameters = "name="+teamName!+"&member="+memberCount!+"&arr="+arr;
but getting this error:
Expression was too long to be solved in a reasonable time. consider breaking the expression into distinct sub expressions.
Any help would be appreciated.

Answer 1

A little confused about what you are trying to achieve exactly, but it seems you are trying to send an array in a form-url-encoded request which is not how it works.
You can either iterate through the array and individually assign them to values in the request parameter with something like so:
var postParameters = "name=\(teamName)&member=\(member)"
let arr = ["aaa", "wassd", "wesdsd"]
var index = 0
for param in arr{
postParameters += "&arr\(index)=\(item)"
index++
}
print(postParameters) //Results all array items as parameters seperately
Ofcourse, this is a kind of dirty solution and is assuming I'm correct about you trying to send an array incorrectly. If possible, I would send the request as an application/json request, as this would make things much easier and less dirty:
func sendRequest() {
let sessionConfig = NSURLSessionConfiguration.defaultSessionConfiguration()
/* Create session, and optionally set a NSURLSessionDelegate. */
let session = NSURLSession(configuration: sessionConfig, delegate: nil, delegateQueue: nil)
guard var URL = NSURL(string: "http://192.168.1.103/MyWebService/api/createteam.php") else {return}
let request = NSMutableURLRequest(URL: URL)
request.HTTPMethod = "POST"
// Headers
request.addValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
// JSON Body
let bodyObject = [
"name": "\(teamName)",
"member": "\(member)",
"arr": [
"aaa",
"wassd",
"wesdsd"
]
]
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(bodyObject, options: [])
/* Start a new Task */
let task = session.dataTaskWithRequest(request, completionHandler: { (data: NSData?, response: NSURLResponse?, error: NSError?) -> Void in
if (error == nil) {
// Success
let statusCode = (response as! NSHTTPURLResponse).statusCode
print("URL Session Task Succeeded: HTTP \(statusCode)")
}
else {
// Failure
print("URL Session Task Failed: %#", error!.localizedDescription);
}
})
task.resume()
session.finishTasksAndInvalidate()
}
Hopefully this can get you in the right direction. Good luck!