feat: add factory method

Author: lgreydev

Help.xcodeproj/project.pbxproj

@@ -10,6 +10,7 @@
 		5E023E89268364C3002465D8 /* ArrayEnumerated.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E023E88268364C3002465D8 /* ArrayEnumerated.swift */; };
 		5E023E8B2683692F002465D8 /* ArrayZip.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E023E8A2683692F002465D8 /* ArrayZip.swift */; };
 		5E023E8F26863070002465D8 /* Dictionary.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E023E8E26863070002465D8 /* Dictionary.swift */; };
+		5E1F2F4927873121009446ED /* FactoryMethod.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E1F2F4827873121009446ED /* FactoryMethod.swift */; };
 		5E2CF7C1266E20AE007BB2EB /* UnwindSegue.swift in Sources */ = {isa = PBXBuildFile; fileRef = 5E2CF7C0266E20AE007BB2EB /* UnwindSegue.swift */; };
 		5E2CF7C5266E242E007BB2EB /* segue-002.png in Resources */ = {isa = PBXBuildFile; fileRef = 5E2CF7C3266E242E007BB2EB /* segue-002.png */; };
 		5E2CF7C6266E242E007BB2EB /* segue-001.png in Resources */ = {isa = PBXBuildFile; fileRef = 5E2CF7C4266E242E007BB2EB /* segue-001.png */; };
@@ -58,6 +59,7 @@
 		5E023E88268364C3002465D8 /* ArrayEnumerated.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ArrayEnumerated.swift; sourceTree = "<group>"; };
 		5E023E8A2683692F002465D8 /* ArrayZip.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ArrayZip.swift; sourceTree = "<group>"; };
 		5E023E8E26863070002465D8 /* Dictionary.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Dictionary.swift; sourceTree = "<group>"; };
+		5E1F2F4827873121009446ED /* FactoryMethod.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FactoryMethod.swift; sourceTree = "<group>"; };
 		5E2CF7C0266E20AE007BB2EB /* UnwindSegue.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UnwindSegue.swift; sourceTree = "<group>"; };
 		5E2CF7C3266E242E007BB2EB /* segue-002.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "segue-002.png"; sourceTree = "<group>"; };
 		5E2CF7C4266E242E007BB2EB /* segue-001.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "segue-001.png"; sourceTree = "<group>"; };
@@ -115,6 +117,14 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		5E1F2F4727872F9B009446ED /* DesignPatterns */ = {
+			isa = PBXGroup;
+			children = (
+				5E1F2F4827873121009446ED /* FactoryMethod.swift */,
+			);
+			path = DesignPatterns;
+			sourceTree = "<group>";
+		};
 		5E2CF7BF266E2087007BB2EB /* UIKit */ = {
 			isa = PBXGroup;
 			children = (
@@ -172,6 +182,7 @@
 				5E8385872667C57600ACA770 /* WorkingCode */,
 				5E2CF7BF266E2087007BB2EB /* UIKit */,
 				5EAF0B7F268C5E9200D92322 /* Features */,
+				5E1F2F4727872F9B009446ED /* DesignPatterns */,
 			);
 			path = Help;
 			sourceTree = "<group>";
@@ -350,6 +361,7 @@
 			files = (
 				5EDE65CE26E29E0000DB71C0 /* SwipeScreen.swift in Sources */,
 				5E8385862667BE7500ACA770 /* Int+Random.swift in Sources */,
+				5E1F2F4927873121009446ED /* FactoryMethod.swift in Sources */,
 				5EAC92C726BD35E700A6198C /* SaveAndLoadDataOnDevice.swift in Sources */,
 				5E2CF7C8266E61A0007BB2EB /* PrepareSegue.swift in Sources */,
 				5E88DEAC273D3C5800363BF6 /* String+CompareNumbers.swift in Sources */,

Help/DesignPatterns/FactoryMethod.swift

@@ -0,0 +1,105 @@
+//
+//  FactoryMethod.swift
+//  Help
+//
+//  Created by Sergey Lukaschuk on 06.01.2022.
+//
+
+import Foundation
+import UIKit
+
+// structure
+
+// MARK: Creator
+final class FactoryExercises {
+    
+    static let defaultFactory = FactoryExercises()
+    
+    func createExercise(name: Exercises) -> Exercise {
+        switch name {
+        case .jumping: return Jumping()
+        case .running: return Running()
+        }
+    }
+    
+    private init() {}
+}
+
+enum Exercises {
+    case jumping
+    case running
+}
+
+// MARK: Product Interface
+protocol Exercise {
+    var name: String { get }
+    var type: String { get }
+    
+    func start()
+    func stop()
+}
+
+
+// MARK: Product A
+class Jumping: Exercise {
+    
+    var name: String = "Jumping"
+    var type: String = "Exercise for legs"
+    
+    func start() {
+        print("Start exercise for legs")
+    }
+    
+    func stop() {
+        print("Stop exercise for legs")
+    }
+}
+
+// MARK: Product B
+class Running: Exercise {
+    
+    var name: String = "Running"
+    var type: String = "Exercise for running"
+    
+    func start() {
+        print("Start exercise for running")
+    }
+    
+    func stop() {
+        print("Stop exercise for running")
+    }
+}
+
+
+// MARK: Implementation
+class SomeViewController: UIViewController {
+    
+    var workout: [Exercise] = []
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        addExercise(.jumping)
+        addExercise(.running)
+        myWorkout()
+        startWorkout()
+        stopWorkout()
+    }
+    
+    func addExercise(_ exercise: Exercises) {
+        let newExercise = FactoryExercises.defaultFactory.createExercise(name: exercise)
+        workout.append(newExercise)
+    }
+    
+    func myWorkout() {
+        workout.forEach { print($0.name) }
+    }
+
+    func startWorkout() {
+        workout.forEach { $0.start() }
+    }
+    
+    func stopWorkout() {
+        workout.forEach { $0.stop() }
+    }
+    
+}

README.md

@@ -57,6 +57,11 @@ In this project, I have collected various best practices and iOS development tip
    - [Add Home Screen Quick Actions](#add-home-screen-quick-actions)
 
 
+- [**Design Patterns**](#design-patterns)
+    - [Factory method](factory-method)
+
+
+
 ## **Clean Code**
 Raising code readability in iOS development. Thanks to the application of these tips, your code will become readable, which will further ensure convenience and speed of working with it.
 
@@ -1349,6 +1354,20 @@ private func respondToSwipeGesture(gesture: UIGestureRecognizer) {
 ```
 
 
+
+## **Design Patterns**
+[Book Design Patterns](https://en.wikipedia.org/wiki/Design_Patterns)
+
+
+
+### [Factory Method](https://github.com/lgreydev/Help/blob/master/Help/DesignPatterns/FactoryMethod.swift)
+[Factory Method RU](https://refactoring.guru/ru/design-patterns/factory-method)
+
+
+
+
+
+
 ### Add Home Screen Quick Actions
 
 Expose commonly used functionality with static or dynamic 3D Touch Home Screen quick actions.