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NalineeR
NalineeR

Posted on • Edited on

Dependency Injection in swift

#swift #ios #dependency #dependencyinjection

The approach used to provide the initial value to the property.
The purpose of this approach is to obtain the loosely coupled code.

There are three type to obtain this -

By Initialisation -> In this type we need to pass the initialisation value in the init func of the class

class DemoVC:UIViewController{ override func viewDidLoad() { super.viewDidLoad() //passing dependency value by init func let obj = Language(langName: "Swift") print(obj.name) } } class Language{ var name:String ///1. Initialisation Dependency Injection init(langName:String) { self.name = langName } }
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By Function -> In this type we pass the initial value as the function param. And the class property is initialised from this param.

class DemoVC:UIViewController{ override func viewDidLoad() { super.viewDidLoad() //setting dependency value passing parameter in method let obj = Language() obj.getLanuageDetails(lanugage: "Swift") } } class Language{ private var name:String! func getLanuageDetails(lanugage:String){ name = lanugage print("Your have shown interest in \(lanugage) Language.") } }
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By Property -> Here we generally create / access the class property and set the value directly.

class DemoVC:UIViewController{ override func viewDidLoad() { super.viewDidLoad() //setting dependency value by setting property directly let obj = Language() obj.name = "Objective C" } } class Language{ var name:String = "Swift" }
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Sergey Leschev •

In my experience working with Swift and iOS development, I have found that using dependency injection is crucial when building large-scale applications. It helps avoid code duplication, enhances testability and modularity. Moreover, it makes the code reusable, readable, and easy to maintain.