Implicit vs Explicit Animations
Using .animation() modifier vs withAnimation {} block for different use cases.
Implicit vs Explicit Animations is a free Swift 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 Swift Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Two Animation Styles
SwiftUI supports implicit animations (the .animation modifier) and explicit animations (the withAnimation closure).
struct Demo: View {
@State private var scale = 1.0
var body: some View {
Circle().scaleEffect(scale)
}
}Implicit Animation with .animation
Attaching .animation(_:value:) to a view animates it whenever the bound value changes.
Circle()
.scaleEffect(scale)
.animation(.easeInOut(duration: 0.3), value: scale)Triggering Implicit Animation
Any state change that affects the view automatically triggers the implicit animation defined on it.
Button("Grow") {
scale = 2.0 // .animation fires automatically
}Explicit Animation with withAnimation
withAnimation wraps a state mutation and animates all resulting view changes simultaneously.
Button("Animate") {
withAnimation(.spring()) {
scale = 2.0
offset = 50
}
}Animating Multiple Properties
withAnimation is better when you want to animate several state changes in sync as a single transaction.
withAnimation(.easeOut(duration: 0.5)) {
isExpanded = true
rotation = 90
opacity = 0.5
}Animation Types
Swift provides spring, easeIn, easeOut, easeInOut, linear, and custom timing curve animations.
.spring(response: 0.4, dampingFraction: 0.6)
.easeInOut(duration: 0.3)
.linear(duration: 0.5)
.timingCurve(0.2, 0.8, 0.2, 1.0, duration: 0.4)Disabling Animation
Pass .animation(.none, value:) or wrap mutations in withAnimation(nil) to disable animation selectively.
Circle()
.scaleEffect(scale)
.animation(.none, value: scale) // no animationAnimation Priority
Explicit withAnimation takes priority over implicit .animation modifiers on child views.
withAnimation(.linear) {
value = true // linear wins over any .animation on subviews
}Repeating Animations
Use .repeatForever or .repeatCount for looping animations like pulsing effects.
.animation(
.easeInOut(duration: 0.8).repeatForever(autoreverses: true),
value: pulsing
)Delay and Speed
Compose animations with .delay and .speed modifiers on the animation value.
.animation(.spring().delay(0.2).speed(1.5), value: flag)Choosing Implicit vs Explicit
Use implicit for single-view animations tied to one value; use explicit when coordinating multiple properties or views.
// Implicit: simple, single view
.animation(.easeIn, value: isVisible)
// Explicit: multi-property or cross-view
withAnimation { a = 1; b = 2 }Quick Check
Which approach best coordinates animating multiple state properties simultaneously?
Lesson Recap
Implicit animations (.animation(_:value:)) react automatically to value changes on a single view. Explicit animations (withAnimation {}) coordinate multiple mutations. Compose with .delay, .speed, and .repeatForever for complex effects.
Frequently asked questions
Is the “Implicit vs Explicit Animations” lesson free?
Yes — the full text of “Implicit vs Explicit Animations” is free to read here on the web, and the Swift 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 Swift Academy course, upgrade to CoddyKit PRO.
What will I learn in “Implicit vs Explicit Animations”?
Using .animation() modifier vs withAnimation {} block for different use cases. You practise Swift 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 Swift Academy?
No prior experience is required. Swift 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 vs Explicit 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 Swift Academy lesson?
Yes. Every Swift 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.