Swift Data :-

1. For open Emojis in text press ctrl + command + Space
2. For Select Color programatically ==> Color Literal

==> // Turnery Operator in Swift:- SYNTAX :- value = condition ? valueIfTrue : valueIfFalse EX :- cell.acessoryType = item.done==True ? .checkmark : .none DETAIL CONDITION :- if item.done == true { cell.accessoryType = .checkmark } else { cell.accessoryType = .none }

==> // Selected Not Selected in Single Line :-

itamArry[indexpath.row].done = !itemArry[indexpath.row].done DETAIL CONDITION :- if itemArry[indexpath.row].done == false { itemArry[indexpath.row].done = true } else { itemArry[indexpath.row].done = false }

==> //Structure

1. MVC 2) Service 3) Utilities(Constant Files) 4) XIB's (If Available)

==> SingleTone Example in array

1. import Foundation
   import Alamofire
   import SwiftyJSON
   class AuthService {
   static let instance = AuthService() // Required in SingleTone files
   

2. Constant files Complition Handler

   typealias ComplitionHandler = (_ Success :Bool) -> ()
   usage:- //Register User with Alamofire
   
    func registerUser (email : String, password: String, completion: @escaping ComplitionHandler){
    let lowerCaseEmail = email.lowercased()
   
    
    let body : [String : Any] = [
        "email" : lowerCaseEmail,
        "password": password
    ]
    
    Alamofire.request(URL_REGISTER, method: .post, parameters: body, encoding: JSONEncoding.default, headers: HEADER).responseString { (response) in
        if response.result.error == nil {
            completion(true)
        } else {
            completion(false)
            debugPrint(response.result.error as Any)
        }
    }
    
   }
   

---

        //Login User with Alamofire
func loginUser (email : String, password: String, completion: @escaping ComplitionHandler) {
    let lowerCaseEmail = email.lowercased()
    
    
    let body : [String : Any] = [
        "email" : lowerCaseEmail,
        "password": password
    ]
    
    Alamofire.request(URL_LOGIN, method: .post, parameters: body, encoding: JSONEncoding.default, headers: HEADER).responseString { (response) in
        if response.result.error == nil {
            
          /*  if let json = response.result.value as? Dictionary<String,Any> {
                if let email = json ["user"] as? String {
                    self.userEmail = email
                }
                if let token = json ["token"] as? String {
                    self.authToken = token
                }
            }*/
            
            //Using Swifty JSON
            guard let data = response.data else {return}
            
            do {
                let json = try JSON(data: data)
                self.userEmail = json["user"].stringValue
                self.authToken = json["token"].stringValue
                print(json)
            } catch {
                print(error)
                // or display a dialog
            }
            self.isLoggedIn = true
           
            completion(true)
        } else {
            completion(false)
            debugPrint(response.result.error as Any)
        }
    }
}

3. Creating Model Swift

       import Foundation
       struct Channel {
       public private(set) var channelTitle : String!
       public private(set) var channelDescription : String!
       public private(set) var id : String!
      }
     // var channels = [Channel]() //Array of Channel Object
   
   //Swift 4 way
   /*struct Channel: Decodable {    //All key in Same Order and As Same name for Encode and Decode Json as Swift4
   public private(set) var _id : String!
   public private(set) var name : String!
   public private(set) var description : String!
   public private(set) var __v : Int?
   }*/ 
         // MARK:- Find All Channel
   func findAllChannel(complition: @escaping ComplitionHandler) {
    Alamofire.request(URL_GET_CHANNELS, method: .get, parameters: nil, encoding: JSONEncoding.default, headers: BEARER_HEADER).responseJSON { (response) in
        if response.result.error == nil {
            guard let data = response.data else {return}
            
            //Swift 4 way in one line
          /*  do {
                self.channels = try JSONDecoder().decode([Channel].self, from: data)
                print(self.channels)
            } catch let error {
                debugPrint(error as Any)
            }*/
            
            //Default Way (Preferable Way)
            do {
                if let json = try JSON(data:data).array {
                    for item in json {
                        let name = item["name"].stringValue
                        let channelDescription = item["description"].stringValue
                        let id = item["_id"].stringValue
                        let channel = Channel (channelTitle: name, channelDescription: channelDescription, id: id)
                        self.channels.append(channel)
                    }
                   
                }
                
            } catch {
                print(error)
            }
            
            NotificationCenter.default.post(name: NOTIF_CHANNELS_LOADED, object: nil)
            complition(true)
            
        } else {
            complition(false)
            print(response.result.error as Any)
        }
    }
   }
   

4. Creating Array in Swift

         var yourArray = [String]()
   

5. Creating Dictionary in Swift

         https://www.agnosticdev.com/content/how-work-dictionaries-swift-4