Book Image

The Ultimate iOS Interview Playbook

By : Avi Tsadok
Book Image

The Ultimate iOS Interview Playbook

By: Avi Tsadok

Overview of this book

As an iOS developer, you must possess a diverse skill set encompassing Swift coding, design knowledge, and mastery of development tools. And while the demand for iOS developers remains high, the competition for landing your dream job has intensified in recent years. Being a skilled iOS developer is no longer enough — acing interviews is now just as essential as having technical expertise. In The Ultimate iOS Interview Playbook, you'll discover innovative ways to stand out as an iOS developer and pass every job interview. It will guide you to build your developer brand and present your skills to potential employers. This comprehensive guide covers over 100 interview questions, from Swift fundamentals and frameworks to complex design patterns and app architecture. You'll learn how to approach coding assessments like a pro and avoid red flags that could hinder your chances of success. Drawing from the author’s experience of interviewing hundreds of iOS developers and having been a candidate themself, this book addresses the challenges of showcasing your skills and knowledge within a limited timeframe. By the end of this book, you'll be ready to excel in any iOS interview, demonstrating your strengths and confidently tackling even the most challenging questions, ultimately paving the way to secure the job you've always wanted.
Table of Contents (20 chapters)
Part 1: Everything about Interviews
Part 2: Swift Language and Coding
Part 3: The Frameworks
Part 4: Design and Architecture

Learning states and observable objects

“States” is a primary topic in SwiftUI and declarative programming. Unlike imperative programming, where we can directly update UI elements on the screen, declarative programming works in the opposite way – we update the state, and the UI is updated according to our changes.

In fact, using states is the only way to create dynamic views in SwiftUI.

SwiftUI uses something called a property wrapper to mark certain variables as states.

Here are some of them:

  • @State: To manage simple UI state
  • @Binding: To allow two directional updates between the view and its children
  • @ObservedObject: To share data between views
  • @EnvironmentObject: To share data between views across an app

When asked about SwiftUI, these different property wrappers play a significant role in understanding how SwiftUI works and building a full-featured app with SwiftUI.

If you want to read more about managing user interface...