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Swift - Introduction - WebService

ViewController.swift

//
//  ViewController.swift
//  TbleExample
//
//  Created by Vasudev Kumaran on 18/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    var firstName:String?;
    let lastName:String = "Kumaran";
    var subject = "Chemistry";
    var anArray:[String] = [];
    var anotherArray = [String]();
    var anDict = [String:Any]();
    var anArrayOfDic:[Dictionary<String,Any>] = [];
    
    func helloWorld(name:String) -> Void {
        
    }

    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.
    }

}

LoginViewController.swift

//
//  LoginViewController.swift
//  TbleExample
//
//  Created by Vasudev Kumaran on 18/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

import UIKit

class LoginViewController: UIViewController,WebServiceDelegate {
    
    @IBOutlet weak var userNameField: UITextField!
    
    @IBOutlet weak var passwordField: UITextField!
    
    var webService:WebService?;
    
    func getWebServiceResults(result: Dictionary<String, Any>) {
        print(result);
    }
    

    override func viewDidLoad() {
        super.viewDidLoad()
        webService = WebService();
        webService?.delegate = self;
        
        // Do any additional setup after loading the view.
    }

    @IBAction func loginPressed(_ sender: Any) {
        let payload:String = "username="+userNameField.text!+"&password="+passwordField.text!;
        
        webService?.serverConnect(webUrl: "http://vasudevkumaran.com/app/login", payload: payload);
        //
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        userNameField.endEditing(true);
        passwordField.endEditing(true);
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

WebService.swift


import UIKit

class WebService: NSObject {
    
    var delegate:WebServiceDelegate?;
    let contentType = "application/x-www-form-urlencoded";
    
    func serverConnect(webUrl:String,payload:String) -> Void {
        let url:URL = URL(string:webUrl)!;
        var request:URLRequest = URLRequest(url: url, cachePolicy: URLRequest.CachePolicy.useProtocolCachePolicy, timeoutInterval: 250);
        request.httpMethod = "POST";
        request.addValue(contentType, forHTTPHeaderField: "Content-Type");
        request.httpBody = payload.data(using: String.Encoding.utf8);

        let session:URLSession = URLSession.shared;
        let sessionTask:URLSessionTask = session.dataTask(with: request, completionHandler:{ (data,response,_) in
            
            let httpResponse:HTTPURLResponse = response as! HTTPURLResponse;
            
            if (httpResponse.statusCode == 200){
                let resultDic:Dictionary<String,Any> = try! JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.mutableContainers) as! Dictionary<String,Any>;
                DispatchQueue.main.async {
                    self.delegate?.getWebServiceResults(result: resultDic);
                }
            }
        }
        );
        
        sessionTask.resume();
        
        
    }

}

WebServiceDelegate.swift

//
//  WebServiceDelegate.swift
//  TbleExample
//
//  Created by Vasudev Kumaran on 18/12/17.
//  Copyright © 2017 NSE. All rights reserved.
//

import Foundation

protocol WebServiceDelegate {
    func getWebServiceResults(result:Dictionary<String,Any>) -> Void;
}

iOS

2017-12-19 00:07:26
1) CoreData - UIDatePicker - Part2 - Final
2017-12-18 23:29:30
2) CoreData - UIDatePicker - Part1
2017-12-18 05:09:33
3) Shopping List App - Swift Part 2 - ActionSheet
2017-12-18 03:22:51
4) Shopping List App - Swift Part 1
2017-12-17 23:34:49
5) Swift - Introduction - WebService
2017-12-15 03:30:23
6) Shopping List IOS App - Part 2
2017-12-15 01:21:10
7) Shopping List IOS App - Part 1
2017-12-14 21:58:22
8) Shopping List IOS App - API Calls
2017-12-14 03:48:37
9) Delegate - Protocols - WebService
2017-12-13 04:28:23
10) NSMutableArray - NSMutableDictionary - TableViewController
2017-12-13 02:47:13
11) UITableViewController
2017-12-12 22:59:32
12) Segue Forward And Unwind
2016-02-27 03:20:22
13) GoogleMap Addon
2016-02-26 04:06:38
14) UILocalNotification With NSNotificationCenter
2016-02-25 03:51:07
15) CLLocationManager Example
2016-02-24 03:27:59
16) UIImagePickerController Using Camera And PhotoLibrary
2016-02-23 02:08:19
17) Multi Section UITableView - UIPickerView
2016-02-18 03:16:09
18) Hello World IOS App Using Swift
2016-02-17 03:10:24
19) Swift Programming Language - Playground
2016-02-15 02:06:55
20) TabBar Controller
2016-02-15 02:06:55
21) Understanding Auto Layout and Layout Constraints
2016-02-10 22:56:12
22) Shopping List App - Cloud - Part 3 - Final
2016-02-09 04:12:06
23) Shopping List App - Cloud - Part 2
2016-02-08 03:21:52
24) Shopping List App - Cloud - Part 1
2016-02-05 03:24:01
25) Protocol And Delegates With NSURLSession
2016-02-04 00:59:51
26) Webservice Using NSURLSession
2016-02-02 02:09:13
27) UIPickerView Addon - InputView And AccessoryView For UITextField
2016-02-02 02:07:12
28) Protocol And Delegates
2016-02-01 00:37:02
29) UIPickerView - Add Programmatically
2016-01-30 00:52:48
30) NSUserDefaults - UIAlertControler - Back Navigation Title Change
2016-01-29 02:01:06
31) CoreData - StudentsRecord App
2016-01-27 21:54:28
32) Manual Segue
2016-01-27 00:04:21
33) TableViewController Example
2016-01-25 02:08:16
34) NSArray And NSDictionary
2016-01-23 03:23:10
35) Reverse (Unwind) Segue
2016-01-22 00:56:28
36) ViewController - Segue - Messages
2014-12-22 05:29:28
37) WebService Example
2014-12-22 05:16:57
38) CoreData Example

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