Uplift iOS Interview
"Uplift iOS Interview" is a comprehensive guide to help aspiring iOS developers soar to new heights in their careers. This book is an indispensable tool for anyone looking to crack the iOS interview and impress their future employers with their technical prowess. With in-depth coverage of Swift, AutoLayout, SwiftUI, Multithreading, Memory management so on and so forth, this book is a treasure trove of knowledge for anyone looking to uplift their iOS development career.
The associated type in Swift gives a placeholder name to a type that will be used as part of the protocol. When the protocol is conformed, the actual type to use for that it is specified. The associated type makes the protocol generic by providing a type placeholder.
I was very confused about the associated type at the beginning. I found that the best way to understand this concept is to use code example. For instance, I have created a protocol for the shopping cart. In the shopping cart, I can add, remove or count different type of shopping items. The type of shopping items will depend on which type of store I have created.
protocol ShoppingCartable { associatedtype ProductType var products: [ProductType] { get set} mutating func addToCart(_ product: ProductType) mutating func removeFromCart(_ product: ProductType) func totalProducts() -> Int } // Let's provide default behaviour of the function by // protocol extension extension ShoppingCartable { mutating func addToCart(_ product: ProductType) { products.append(product) } mutating func removeFromCart(_ product: ProductType) { // ... } func totalProducts() -> Int { return products.count } }
Now, I have created two structs. The first one is the Food
struct which will be used for the associated type. The second one is FoodStore
which will conform to our ShoppingCartable protocol. Here, the Swift compiler uses Food
type to fill the placeholder in the associated type. However, Food
is a very simple type but we can also use a type alias in case of complicated types.
struct Food { let name: String let price: Double } struct FoodStore: ShoppingCartable { var products: [Food] = [] } var store = FoodStore() let milk = Food(name: "Milk", price: 5.0) store.addToCart(milk)
Rev Up Your iOS Skills: Take a Dynamic Learning Journey

iOS Career Boost is the ultimate learning journey to elevate your iOS development career through a dynamic blend of visual learning, handy cheat sheets, coding practice materials, and expertly curated tips and tricks
Get Ready to Shine: Mastering the iOS Interview
- Uplift iOS Interview - A Comprehensive Guide to iOS Interview
- Xcode Cheat Sheet for Swift
- Xcode Cheat Sheet for SwiftUI
Enjoying the articles? Get the inside scoop by subscribing to my newsletter.
Get access to exclusive iOS development tips, tricks, and insights when you subscribe to my newsletter. You'll also receive links to new articles, app development ideas, and an interview preparation mini book. Your email address will only be used for the purpose of sending the newsletter and will not be shared with third parties or advertisers. Rest assured that we value your privacy and will not spam your inbox.
Connect with me on
Twitter and LinkedIn and don't hesitate to reach out with any questions about this post. Thank you for reading.