Day 31
Day 31 ๊ด๋ จ
Project 5, part 3
Dwayne โThe Rockโ Johnson once said, โsuccess isn't always about greatness, it's about consistency. Consistent hard work leads to success; greatness will come.โ
Obviously I want to get you towards SwiftUI greatness as fast and effectively as possible, but that takes a lot of consistency from you. To be fair, it is already day 31 and you keep coming back, so youโre fulfilling your part of the deal โ well done!
With another project done, itโs time for you to take matters into your own hands. Yes, this is the โhard workโ part of the project, where you need to complete some challenges without my help, and also pass a test to make sure what youโre learning is sinking in.
You can do this!
Today you should work through the wrap up chapter for project 5, complete its review, then work through all three of its challenges.
Word Scramble: Wrap up
Word Scramble: Wrap up
This project was a last chance to review the fundamentals of SwiftUI before we move on to greater things with the next app. Still, we managed to cover some useful new things, not least List, onAppear, Bundle, fatalError(), UITextChecker, and more, and you have another app you can extend if you want to.
One thing I want to pick out before we finish is my use of fatalError(). If you read code from my own projects on GitHub, or read some of my more advanced tutorials, youโll see that I rely on fatalError() a lot as a way of forcing code to shut down when something impossible has happened. The key to this technique โ the thing that stops it from being recklessly dangerous โ is knowing when a specific condition ought to be impossible. That comes with time and practice: there is no one quick list of all the places itโs a good idea to use fatalError(), and instead youโll figure it out with experience.
Review what you learned
Anyone can sit through a tutorial, but it takes actual work to remember what was taught. Itโs my job to make sure you take as much from these tutorials as possible, so Iโve prepared a short review to help you check your learning.
Click here to review what you learned in this project.
Challenge
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 whatโs going on:
- Disallow answers that are shorter than three letters or are just our start word.
- Add a toolbar button that calls
startGame(), so users can restart with a new word whenever they want to. - Put a text view somewhere so you can track and show the playerโs score for a given root word. How you calculate score is down to you, but something involving number of words and their letter count would be reasonable.
Word Scramble: Wrap up - Additional
Why not make a video of your finished app and share it online? You should be proud of all your hard work!
