Skip to main content

Design Patterns on iOS using Swift

Design Patterns on iOS using Swift - Singleton Design Pattern Example


iOS Design Patterns Tutorial - Design patterns are evolved as reusable solution to the problem that we encounter every day of programming

Types of Design Patterns - iOS Developer Live

Creational: This type design deals with the object creation and initialization.
   Eg: Singleton, Factory, Abstract Factory.

Structural: This type design pattern deals with class and object composition
Eg: MVC, Decorator, Adapter, Bridge, Facade.

Behavioral: Deals with the communication between classes and object
   Eg: Observer, and, Memento

Singleton Design Pattern


Creational Pattern - Singleton Design Patterns

Creational Pattern - Only one Instance of a particular classes, singleton pattern belongs to Ceational type pattern, This pattern is used when we need to ensure that only one object of a particular class need to be created. Only one object available across the application in a controlled 
  1. Declaring all constructor of the class to be private
  2. Provide static method that return a reference to the instance.
  3. The instance to be stored as a private static variable   

Example:-

class singaltonDemo
{
    static let instance = singaltonDemo()
    var data: Int = 0
    private init(){
        
    }
    
     func setData(value: Int){
         data = value
         
     }
    func getData() ->Int {
        return data
    }
}

singaltonDemo.instance.setData(10)
print("Data = \(singaltonDemo.instance.getData())")



Comments

Popular posts from this blog

How Create Animated Circle Progress Bar iOS 11 Swift 4

Animated Circle Progress Bar iOS 11 Swift 4


With MBCircularProgressBar - https://github.com/MatiBot/MBCircularProgressBar


A circular, animatable & highly customizable progress bar from the Interface Builder Swift, Using pod fite MBCircularProgressBar Installation Cocoapods terminal.

pod "MBCircularProgressBar"

That - A Simple Steps to installed pod file -        Open terminal       Command on terminal go to project folder Cd path       set your project path on terminal.       command : pod init       open pod file - open -e podfile       added in pod file with in : pod "MBCircularProgressBar"       Command : Pod install       Close project of Xcode       open your Project from terminals       Command : open PodDemos.xcworkspace After opern StoryBoard and Now drag a UIView over the viewController in storyboard

Or set UIView Constraint width, height or verticle or horzentail space and set a class MBCircularProgressBarView in StoryBoard. Open Atribute inspector and cu…

Facebook Login - Facebook Authentication and Cocoapods

Create a new application facebook login and authentication a facebook user using their iOS SDK with Cocoapods. Below are the steps in which we'll be following: First Getting Started guide from Facebook's iOS SDK Documentation Create a new iOS project Swift


Open facebook Developer Account and create new App after go to setting and click basic -> add platform ios
https://developers.facebook.com/docs/ios/getting-started
https://developers.facebook.com/ Then add Bundle id your ios project like com.xxxx, Configuring Facebook with Bundle ID Then go ahead Download facebook sdk for ios other wise install pod file your project.
Go ahead to open terminal and go ahead your project folder.

Got create podfile -> pod init
Open podfile -> open podfile Paste ->  pod 'FBSDKCoreKit' 
               pod 'FBSDKShareKit' 
               pod 'FBSDKLoginKit' podfile and save

Then go to terminal or install podfiles -> pod Install
Like

Enabling Facebook's Authentication Mech…

Core Data With Swift 4.0 Tutorial

Core Data - Core Data is a framework that you use to manage the data model layer objects or instance Context in your application. It provides generalized and automated data stores solutions to common tasks associated with object life cycle and object graph management, including persistence.
Completely Tutorial for Swift 4 and iOS 11. Gating Start Goto Xcode and create New iOS Project on single view. Project Name CoreDataSwift or Checked Use Core Data

On click Main.Storyboard in Interface builder click on project navigation Editor - Embed In - Navigation controller.



Then After click on Navigation ViewController and next Drag TableView in to ViewController.


Make TableView viewcontroller Outlet Delegate, DataSource and import CoreData

import UIKit import CoreData
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { overridefunc viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } overridefunc didReceiveMem…