howard-e / landmarks-swiftui

Landmarks is an iOS application built using SwiftUI. It is used to discover and share places you love. Built using a tutorial provided by Apple.

Landmarks

Overview

Landmarks is an iOS application built using SwiftUI. It is used to discover and share places you love.

It served as a learning experence as it was built while doing a SwiftUI tutorial provided by Apple (Learn to Make Apps with SwiftUI ).

It is broken down into several sections.

Sections

SwiftUI Essentials

Creating and Combining Views

Laying out the views, making use of stacks to combine different UI components and adding a map through MapKit was covered in this section. Also of note was understanding the different changes introduced in Xcode 11 as it relates to creating a SwiftUI application.

Follow-up Questions

Q1. When creating a custom SwiftUI view, where do you declare the view’s layout?

In the body property.

Custom views implement the body property, which is a requirement of the View protocol.

Q2. Which layout renders from the following view code?

var body: some View {
    HStack {
        CircleImage()
        VStack(alignment: .leading) {
            Text("Turtle Rock")
                .font(.title)
            Text("Joshua Tree National Park")
        }
    }
}

The nested horizontal and vertical stacks arrange the image to the left of the two text views.

Q3. Which of these is a correct way to return three views from a custom view’s body property?

VStack {
   Text("Turtle Rock")
      .font(.title)
   Divider()
   Text("Joshua Tree National Park")
}

You can use a stack to return multiple views from a body property.

Q4. Which is the correct way to use modifier methods to configure a view?

Text("Hello world!")
   .font(.title)
   .foregroundColor(.purple)

A modifier returns a view that applies a new behavior or visual change. You can chain multiple modifiers to achieve the effects you need.

Building Lists and Navigation

A way to provide users with the full list of landmarks and showing details about each location is covered in this section.