day-054

Day 54: Project 13: Instafilter, Part Three

Follow along at https://www.hackingwithswift.com/100/54.

📒 Field Notes

This day covers the third and final part of Project 13: Instafilter in Hacking with Swift.

I previously created projects alongside the material in the book in a separate repository. And you can find Project 13 here. Even better, though, I copied it over to Day 52's folder so I could extend it from where I left off.

With that in mind, Day 54 focuses on extending the project according to a set of challenges.

🥅 Challenges

Challenge 1

Try making the Save button show an error if there was no image in the image view.

• 🔗 Commit
  • I took a slightly different approach and made the save button disabled until an image was present 🙂.

Challenge 2

Make the Change Filter button change its title to show the name of the currently selected filter.

• 🔗 Commit

Challenge 3

Experiment with having more than one slider, to control each of the input keys you care about. For example, you might have one for radius and one for intensity.

• 🔗 Commit

📸 Screens

🔗 Additional/Related Links

• Apple's Core Image Filter Reference
• Core Image Filter Reference