iOS Developer Interview Questions
What is the purpose of IBDesignable?
Suggested approach: Marking a custom view as IBDesignable allows Xcode to render a preview of it when editing storyboards. It's useful when you create your own custom view subclasses and want to see them rendered live in IB, particularly when you want to set their properties there too.
Estimated difficulty: Intermediate
See the full list of iOS interview questions
Important notes
- There are over 150 interview questions in the system. Once you've read the question and come up with a suitable answer, try reading my suggested approach and see if it helps you add more detail.
- These questions are not designed to be hard; a good interviewer is more interested in generating discussion that lets your ability and interests shine through.
- If you answer a question with "yes" or "no" you've missed the point – interviewers prefer you to provide reasoning, explanation, or detail, so try to elaborate with examples!
- If you're looking for detailed technical questions about the language, you should try my Swift tests instead – there are multiple challenges that will work your brain hard.
- For a whole series of coding challenges for job interviews, I wrote the perfect book for you: Swift Interview Challenges.
Related questions
- What is the function of anchors in Auto Layout?
- What is the purpose of reuse identifiers for table view cells?
- Which parts of UIKit are you least familiar with?
- What is the difference between aspect fill and aspect fit when displaying an image?
- How does a view's intrinsic content size aid in Auto Layout?
