September 23 (4)

ZStack

• Will the the size of its largest view
• First view in the stack is at the bottom and successive views go over
• Nine typical alignments but even more exist https://developer.apple.com/documentation/swiftui/alignment

ScrollView

• Beware adding padding to ScrollView itself, will cause scroll indicator to be strangely inset
• ScrollView will only be the width of its widest child view unless you expand it
• See in the API that you can hide the scroll indicators
• Try making a large HStack and place it in a ScrollView that scrolls horizontally
• Use Safe Area Insets if you need to place content around a scroll view but still want content to scroll behind

List and Form

• https://developer.apple.com/documentation/swiftui/list
• https://developer.apple.com/documentation/swiftui/form
• Try out listStyle

NavigationStack and NavigationLink

https://developer.apple.com/documentation/swiftui/navigationstack https://developer.apple.com/documentation/swiftui/navigationlink

can ignore .navigationDestination for now

TabView

Warning: Tab is for iOS 18 so you should pay more attention to the tab modifiers you see in the comments at the beginning of the video. I'll update the demo app when I can.

https://developer.apple.com/documentation/swiftui/tabview https://developer.apple.com/documentation/swiftui/tabviewstyle

Presenting a Sheet

Activate with a Button or Toggle (See below)

https://developer.apple.com/documentation/swiftui/view/sheet(ispresented:ondismiss:content:)

Button, Toggle, State, Binding

Toggle

https://developer.apple.com/documentation/swiftui/toggle

Button

We've used this a bit in examples already. Make your own that changes a property of your view. Use the @State property wrapper for the thing you are going to change. There are a few built-in button styles to try too. The action can use trailing closure syntax.

https://developer.apple.com/documentation/swiftui/state https://www.hackingwithswift.com/quick-start/swiftui/what-is-the-state-property-wrapper

Refactoring Repetitive Code

Creating New Project from Assignment Repo

NB: You will see a student's name in my text editor because I was taking grading notes there earlier in the week.

Using Gitignore

Instructions are in the video above and here is a link for the gitignore I suggest that you use

Use this one https://www.toptal.com/developers/gitignore/api/xcode,macos,visualstudiocode

Polish Notes

• Tab is for iOS 18, need to show .tab modifier
• iOS 17 runtime not on all devices
• Computers clear all their data every time and makes it hard ot get started again, especially for token creation
• Simulator wouldn't show up even after downloading three times
• NavStack use only one
• Video to make extensions for colors, fonts, etc.
• Video for making a common view with default parameters, talk about member-wise inits