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iOS Developer Interview Questions

What is the purpose of UIVisualEffectView?

Suggested approach: This is used to blur backgrounds, either light or dark, so that text can be overlaid more easily. You can optionally enable vibrancy, which causes the text to be rendered in a bright, contrasting color alongside the blur.

Of course, the real underlying question here is why they exist at all, and here you'll probably want to talk about keeping parts of your UI visible, even when it's just blurred, to help provide some extra context to your user of where they are in your app.

  Estimated difficulty: Easy

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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, I wrote the perfect book for you: Swift Coding Challenges.

Related questions

See the full list of iOS interview questions

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