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SwiftUI Academy · Lesson

Backgrounds & Corner Radius

Apply colors, gradients, and rounded corners.

Backgrounds & Corner Radius is a free SwiftUI Academy lesson on CoddyKit — lesson 3 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the SwiftUI Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Adding a Background

The background modifier paints behind a view. Drop in a color and the area the view occupies fills in, instantly turning plain text into a tile.

Text("Hello")
    .background(.blue)

Pad First, Then Color

A background hugs the content tightly. Add padding before the background so the color has comfortable space around the text inside.

Text("Pill")
    .padding()
    .background(.blue)

Readable Text on Color

Dark backgrounds need light text. Pair a colored background with foregroundStyle so your label stays crisp and easy to read.

Text("Tag")
    .padding()
    .background(.indigo)
    .foregroundStyle(.white)

Rounding the Corners

Sharp corners can feel harsh. The cornerRadius modifier softens them, clipping the view into a friendly rounded rectangle.

Text("Soft")
    .padding()
    .background(.blue)
    .cornerRadius(12)

Order Makes the Shape

Corner radius rounds whatever it follows, so place it after the background. Rounding before the color would clip the text, not the tile.

Background with a Shape

For more control, pass a shape to background. A RoundedRectangle fills and rounds in one step, the modern way to build cards.

Text("Card")
    .padding()
    .background(RoundedRectangle(cornerRadius: 16).fill(.teal))

Making a Circle

A large radius on a square view yields a circle. Combine an equal frame with clipShape using Circle for round avatars and icon badges.

Text("A")
    .frame(width: 60, height: 60)
    .background(.orange)
    .clipShape(Circle())

Gradients as Backgrounds

Backgrounds are not limited to flat colors. A LinearGradient adds depth, flowing smoothly from one color to another across the view.

Text("Glow")
    .padding()
    .background(LinearGradient(colors: [.pink, .orange], startPoint: .top, endPoint: .bottom))

Materials for Depth

SwiftUI ships translucent Material backgrounds that blur whatever sits behind them, giving cards a native, frosted-glass feel.

Text("Frosted")
    .padding()
    .background(.ultraThinMaterial)

Adding a Border

Pair a background with an overlay stroke to outline a card. The rounded rectangle border traces the same corners as the fill.

Text("Bordered")
    .padding()
    .overlay(RoundedRectangle(cornerRadius: 12).stroke(.gray))

Building a Real Card

Stack these tools and a card appears: padding for room, a background for color, and a corner radius to round it into a polished tile.

Text("Done")
    .padding()
    .background(.green)
    .cornerRadius(10)

Quick Check

Make sure the modifier order clicked for you.

Recap

Awesome! You can now style views with a background, round corners, add gradients, materials, and borders to build clean, reusable cards.

Frequently asked questions

Is the “Backgrounds & Corner Radius” lesson free?

Yes — the full text of “Backgrounds & Corner Radius” is free to read here on the web, and the SwiftUI Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the SwiftUI Academy course, upgrade to CoddyKit PRO.

What will I learn in “Backgrounds & Corner Radius”?

Apply colors, gradients, and rounded corners. You practise SwiftUI Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start SwiftUI Academy?

No prior experience is required. SwiftUI Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 4, so you can start here or from the beginning and move at your own pace.

How long does the “Backgrounds & Corner Radius” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this SwiftUI Academy lesson?

Yes. Every SwiftUI Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Adding Padding Around Views
  2. Sizing Views with frame
  3. Backgrounds & Corner Radius
  4. Spacer & Layout Priority
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