Thread 1, Day 12 - Tuesday, November 8, 2022

Agenda

1. SwiftUI: Composition of Views Using Custom Structures
   • Remember D.R.Y. ?
     • Don't repeat yourself.
   • We can write our own structures that conform to the View protocol.
     • These custom structures build upon the structures like VStack, HStack, ScrollView, et cetera that are provided by Apple through the SwiftUI framework.
     • By using custom structures, we avoid having to make repetitive changes to our code.
     • As well, the overall number of lines of code that it takes to write an app is much lower.
2. Exercise: Improving the List View in FavouriteThings
   • Currently, the list view looks like this:
     
   • NavigationLink labels can show any view, not just a Text view.
   • Using your new knowledge from yesterday's class about how to combine VStack and HStack structures, and from today's class about how to create a new custom structure, modify your project so that the list view looks like this instead:
     
   Hint

   To re-use existing images in your app and show a smaller square thumbnail, the view modifiers shown here will do the trick:
   

To-do items

Before our next class...

• Complete the tasks from today's agenda
• Be sure to share your results, and questions, on Spaces when you are done