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SwiftUI Academy · Lesson

Insertion & Removal Transitions

Animate views appearing and disappearing.

Insertion & Removal Transitions 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.

Views Coming and Going

When a view is added or removed, a transition describes how it animates in and out instead of just popping.

Transitions Need Animation

A transition only plays when the insertion or removal happens inside an animation, like a withAnimation toggle of a boolean.

The .transition Modifier

You attach .transition to the view that appears or disappears, choosing the style of its entrance and exit.

if show {
    Banner().transition(.opacity)
}

Fade with .opacity

The simplest transition is .opacity, which fades a view in when added and out when removed.

Slide In and Out

The .slide transition moves a view in from one edge and out the other, great for banners and rows.

.transition(.slide)

Scale to Grow

The .scale transition grows a view from small to full size on insert and shrinks it on removal.

.transition(.scale)

Move from an Edge

Use .move(edge:) to push a view in from a specific side, such as the bottom for a toast message.

.transition(.move(edge: .bottom))

Combine Transitions

Chain effects with .combined(with:) so a view can fade while it slides, giving richer motion.

.transition(.opacity.combined(with: .slide))

Asymmetric Transitions

With .asymmetric you set different insertion and removal effects, like scale in but fade out.

.transition(.asymmetric(
    insertion: .scale,
    removal: .opacity))

Trigger the Change

Wrap the boolean toggle in withAnimation so the conditional view runs its transition rather than appearing instantly.

withAnimation {
    show.toggle()
}

Transitions and Identity

SwiftUI plays a transition based on view identity: a view truly entering or leaving the hierarchy, not just changing values.

Quick Check

What is required for a transition to actually play?

Recap: Transitions

You learned that .transition styles how views enter and leave, from fades to slides to asymmetric combos, all triggered by animated changes. 🎬

Frequently asked questions

Is the “Insertion & Removal Transitions” lesson free?

Yes — the full text of “Insertion & Removal Transitions” 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 “Insertion & Removal Transitions”?

Animate views appearing and disappearing. 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 “Insertion & Removal Transitions” 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. Implicit Animations
  2. Explicit Animations with withAnimation
  3. Insertion & Removal Transitions
  4. Spring & Custom Timing Curves
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