Implicit Animations
Animate state changes with the animation modifier.
Implicit Animations is a free SwiftUI Academy lesson on CoddyKit — lesson 1 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.
Motion Makes It Feel Alive
A change that snaps into place feels jarring. With animation, SwiftUI smoothly tweens between the old and new states for you. ✨
What Implicit Means
An implicit animation watches a value and animates any view change caused by it, without you describing each frame.
The .animation Modifier
You attach .animation to a view and tie it to a value. When that value changes, SwiftUI animates the affected properties.
Circle()
.scaleEffect(big ? 2 : 1)
.animation(.default, value: big)Always Pass a Value
Modern .animation(_:value:) needs the value to observe. SwiftUI only animates when that exact value changes, keeping motion predictable.
What Gets Animated
SwiftUI animates the animatable properties between states: position, size, opacity, rotation, and color all tween smoothly.
Pick a Curve
The first argument is the animation curve. Common choices are .default, .easeInOut, .linear, and .spring for different feels.
.animation(.easeInOut, value: isOn)Control the Duration
Add a duration to set how long the motion lasts. A short 0.2s feels snappy; a longer 1s feels relaxed.
.animation(.easeInOut(duration: 0.4), value: isOn)Animate Opacity
Fading is a classic implicit animation. Change opacity with a bound value and SwiftUI cross-fades the view in or out.
Text("Hi")
.opacity(show ? 1 : 0)
.animation(.easeIn, value: show)Animate Rotation
Tie rotationEffect to a value and the view spins smoothly when it flips, perfect for chevrons and loading marks.
.rotationEffect(.degrees(open ? 90 : 0))
.animation(.default, value: open)Scope It to One Value
Because you name the value, only changes to that value animate. Other view updates stay instant and unaffected.
Turn Animation Off
Pass nil as the animation to disable motion for that value. Handy when a change should jump instantly instead.
.animation(nil, value: count)Quick Check
How does an implicit animation know when to run?
Recap: Implicit Animations
You learned that .animation(_:value:) smoothly tweens view changes tied to a value. Pick a curve, set duration, and SwiftUI handles the rest. 🎉
Frequently asked questions
Is the “Implicit Animations” lesson free?
Yes — the full text of “Implicit Animations” 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 “Implicit Animations”?
Animate state changes with the animation modifier. 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 1 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Implicit Animations” 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.