To navigate and use a VIPER stack, you’d instantiate its router and then ask it to create its view controller. Then the VC owns presenter, presenter owns interactor, and interactor owns entities and the router. The resulting view controller is used in your view hierarchy and inserted, pushed, or presented as necessary. This architecture allows for strong encapsulation of logic and scalability for team size since every part of your app is now a VIPER stack. This question likely will be asked interviewing for a big company with a large iOS development team.
Description For Senior iOS Developer (Objective-C & Swift)
Mastery of MVC demonstrates your commitment to best practices and your ability to organize code in a clear, logical, and modular way. As a Senior iOS programmer skills Developer, you’re expected to be well-versed in optimizing app performance and user experience. Grand Central Dispatch (GCD) is a powerful technology used to achieve concurrency in iOS apps.
Can you explain the concept of protocol-oriented programming in Swift?
- To achieve this, I used Apple’s Push Notification service (APNs) for delivering the notifications.
- By asking about delegation, hiring managers can assess your proficiency in iOS development and your ability to create efficient, modular code that can be easily maintained and extended.
- Along with experience with offline storage, threading, and performance tuning is also required.
- Since iOS 6 we have AutoLayout, which is the go-to solution these days and which Apple prefers.
- This demonstrates your ability to create high-quality software that performs well on various devices.
- The iOS community is supportive and full of resources—don’t hesitate to ask questions, share what you’ve learned, and help others along the way.
Scrolling performance is a big issue with UITableViews and quite often can be very hard to get right. When the user scrolls, every next cell needs to calculate its content and then height before it can be displayed. If you do manual Frame view layouts then it is more performant but the challenge Middle/Senior iOS (Swift) Developer job is to get the height and size calculations just right. If you use AutoLayout then the challenge is to set all the constraints right.
How to Answer “Tell Me About Yourself?” in an Interview
- Senior iOS Developers also take the lead in defining and implementing robust app architectures and complex user interfaces.
- Additionally, I use Auto Layout efficiently to avoid layout recalculations that can impact performance.
- Frames are too error-prone and difficult to use because it’s hard to calculate precise coordinates and view sizes for various devices.
- As an iOS developer, there comes a point in your career when you start thinking about that next big step – reaching the senior level.
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The platform offers end-to-end Swift development solutions that prioritize speed, security, and scalability. Hyperlink infoSystem has a pool of 1,200+ developers that has delivered over 4,500 mobile applications and 2,200 web development projects. With offices in the USA, UK, Canada, UAE, and Australia, they have served more than 2,700 clients like Disney, Google, and Tata Power in the past 14 years. CMARIX has 15+ years of experience and connects you with 230+ in-house engineers. Their client base spans 46+ countries with over 290 Swift-based iOS applications created for startups and enterprises.
How to Answer “Tell Me About A Time When You Had To Balance Competing Priorities?”
Our content meets real-time industry demands, ensuring readers receive timely, accurate, and actionable advice. We value our readers’ insights and encourage feedback, corrections, and questions to maintain the highest level of accuracy and relevance. Also, look for evidence of problem-solving skills, ability to work in a team, and a good understanding of Apple’s design principles and application interface guidelines. What distinguishes truly exceptional senior developers isn’t just technical skill—it’s their impact on those around them. They raise the bar for their entire team, mentor the next generation, and create solutions that stand the test of time. Another important aspect is ensuring seamless navigation and intuitive interactions within the app.
Software Engineer (Mobile – IOS) – TrainingPeaks
- This figure can be substantially higher in tech hubs like San Francisco, New York, and Seattle, where senior iOS roles can command $160, ,000+ when including bonuses and equity.
- Demonstrating your knowledge of this key element shows that you have the necessary skills and experience to lead and contribute to the development of complex iOS applications.
- Those approaches proved to be unmanageable as our codebase and dependencies grew.
- They have a team of 1,000+ engineers who work with SwiftUI, UIKit, Core Data, and Combine frameworks.
Memory leaks and app crashes are all too common due to poorly managed memory in iOS apps. The code you write for your app can be as simple as a method/function call, or as complex as VIPER architecture. The rest of the code you write to implement the business logic of your app is placed somewhere in the “trigger points” delegated by that main loop to our app via AppDelegate or SceneDelegate. Before iOS 13 AppDelegate was responsible for receiving all external events for your application and spinning up the UI; but starting with iOS 13 all UI-related logic was moved to SceneDelegate.
Swift Language and iOS/macOS Development Knowledge:
The role focuses on developing and maintaining iOS applications using both Objective-C and Swift, working with prestigious clients from the United States and Europe. One of the projects where I utilized SwiftUI was an e-commerce application, where I implemented various custom views and animations using the framework. The live preview feature significantly sped up my development time, as I could see the changes instantly without having to rebuild the entire project. However, this can lead to retain cycles if two objects have strong references to each other. For UI testing, I utilize XCUITest, also part of the XCTest framework, to simulate user interactions with the application’s interface.
What they want to hear from you, though, is what else we commonly use out of the box. Singleton is a common design pattern used in many OOP languages, and Cocoa considers it one of the “Cocoa Core Competencies”. This question comes up on interviews to either gauge your experience with singletons, or find out if you have a background in something other than just iOS. It deallocates memory used by objects whose reference count dropped to zero. ARC does not increase or decrease the reference count of value types because, when assigned, these are copied.