complete Day 79

README.md

@@ -84,10 +84,11 @@ I'm currently seeking freelance, remote opportunities as an iOS developer! If yo
 - **Day 75:** [_Project 15: Accessibility_ (Part Two)](./day-075/)
 - **Day 76:** [_Project 15: Accessibility_ (Part Three)](./day-076/)
 - **Day 77:** [Milestone for Projects 13-15 (Part One)](./day-077/)
+- **Day 78:** [Milestone for Projects 13-15 (Part Two)](./day-078/)
 
 </details>
 
-- **Day 78:** [Milestone for Projects 13-15 (Part Two)](./day-078/)
+- **Day 79:** [_Project 16: QRCollector (Part One)_](./day-079/)
 
 
 

day-079/README.md

@@ -0,0 +1,50 @@
+# Day 79: _Project 16: QRCollector_ (Part One)
+
+_Follow along at https://www.hackingwithswift.com/100/swiftui/79_.
+
+<br/>
+
+
+# 📒 Field Notes
+
+This day covers Part One of _`Project 16`_ in the [100 Days of SwiftUI Challenge](https://www.hackingwithswift.com/100/swiftui/79).
+
+It focuses on several specific topics:
+
+- Hot Prospects: Introduction
+- Reading custom values from the environment with @EnvironmentObject
+- Creating tabs with TabView and tabItem()
+
+
+## Hot Prospects: Introduction
+
+
+From the description:
+
+> ...an app to track who you meet at conferences. You’ve probably seen apps like it before: it will show a QR code that stores your attendee information, then others can scan that code to add you to their list of possible leads for later follow up.
+
+I could be wrong, but the way this app is going to be structured, the actual contents of the QR codes could be pretty open-ended. With that in mind, I'm going to name the app `QRCollector` -- and see if it would be more interesting to embed diverse kinds of information into the codes we store.
+
+
+
+## Reading custom values from the environment with @EnvironmentObject
+
+Using the `Environment` to store app state is a big topic on its own. One cool SwiftUI-specific tidbit is the way applying the `environmentObject` modifier to a view `View` causes all of that view's children to have access to it:
+
+```swift
+VStack {
+    EditView()
+    DisplayView()
+}
+.environmentObject(user)
+```
+
+
+
+## Creating tabs with TabView and tabItem()
+
+Like many of SwiftUI's UIKit analogs, using `TabView` instead of `UITabViewController` feels so much more intuitive.
+
+As soon as you get familiar with the pattern of using `tabItems`, tagging them with some identifiable value, and then using the containing struct's `@State` to change the active tab (by synching it with each tabItem's tag), creating tabbed interfaces is pretty straightforward.
+
+As a bonus, using `@State` to control the active tab can even serve as the foundation for [dynamic deep-linking](https://nalexn.github.io/swiftui-deep-linking/).