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SwiftUI Animated Blur Background
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| // | |
| // AnimatedBackground.swift | |
| // Playground | |
| // | |
| // Created by Colin Harris on 23/5/24. | |
| // | |
| import SwiftUI | |
| struct AnimatedBackground: View { | |
| var body: some View { | |
| FloatingBlur( | |
| fill: AnyShapeStyle(.teal.gradient), | |
| direction: .clockwise, | |
| offset: CGSize(width: 75, height: 0) | |
| ).offset(y:-75) | |
| FloatingBlur( | |
| fill: AnyShapeStyle(.orange.gradient), | |
| direction: .counterClockwise, | |
| offset: CGSize(width: -100, height: 0) | |
| ) | |
| FloatingBlur( | |
| fill: AnyShapeStyle(.pink.gradient), | |
| direction: .clockwise, | |
| offset: CGSize(width: 75, height: -75) | |
| ).offset(y:75) | |
| } | |
| } | |
| struct FloatingBlur: View { | |
| var fill: AnyShapeStyle | |
| var rotationDirection: RotationDirection | |
| var offset: CGSize | |
| @State var rotation: Double | |
| init(fill: AnyShapeStyle, direction: RotationDirection, offset: CGSize) { | |
| self.fill = fill | |
| self.rotationDirection = direction | |
| self.offset = offset | |
| self.rotation = rotationDirection.startDegrees | |
| } | |
| var body: some View { | |
| Circle() | |
| .fill(fill) | |
| .blur(radius: 80) | |
| .frame(width: 250) | |
| .offset(offset) | |
| .rotationEffect(.degrees(rotation)) | |
| .onAppear { | |
| withAnimation(.linear(duration: 10).repeatForever(autoreverses: false)) { | |
| rotation = rotationDirection.endDegrees | |
| } | |
| } | |
| } | |
| } | |
| enum RotationDirection { | |
| case clockwise | |
| case counterClockwise | |
| var startDegrees: Double { | |
| switch self { | |
| case .clockwise: | |
| return 0 | |
| case .counterClockwise: | |
| return 360 | |
| } | |
| } | |
| var endDegrees: Double { | |
| switch self { | |
| case .clockwise: | |
| return 360 | |
| case .counterClockwise: | |
| return 0 | |
| } | |
| } | |
| } | |
| #Preview { | |
| AnimatedBackground() | |
| } |
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demo-video.mp4