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Flashzilla: Wrap up

Paul Hudson    @twostraws   

This was our another super-sized project, but also another one where we covered some really great techniques like gestures, haptics, Combine, and more. When these features work together we can do remarkable things in our apps, providing an experience to users that is seamless and delightful.

You also saw once again the importance of ensuring accessibility in our apps. It’s easy to get carried away with cool gestures and more, but then forget that straying from standard UI also means we need to up our game when it comes to VoiceOver and more. Anyone can make a good idea, but to make a great app means you’ve taken into account the needs of everyone.

Review what you learned

Anyone can sit through a tutorial, but it takes actual work to remember what was taught. It’s my job to make sure you take as much from these tutorials as possible, so I’ve prepared a short review to help you check your learning.

Click here to review what you learned in this project.


One of the best ways to learn is to write your own code as often as possible, so here are three ways you should try extending this app to make sure you fully understand what’s going on.

  1. Make something interesting for when the timer runs out. At the very least make some text appear, but you should also try designing a custom haptic using Core Haptics.
  2. Add a settings screen that has a single option: when you get an answer one wrong that card goes back into the array so the user can try it again.
  3. If you drag a card to the right but not far enough to remove it, then release, you see it turn red as it slides back to the center. Why does this happen and how can you fix it? (Tip: use a custom modifier for this to avoid cluttering your body property.)
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