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UIVisualEffectView with any blur radius in SwiftUI
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| // | |
| // BackdropBlurView.swift | |
| // | |
| // Created by Dmitry Gulyagin on 20.09.2022. | |
| // | |
| import SwiftUI | |
| /// A View which content reflects all behind it | |
| struct BackdropView: UIViewRepresentable { | |
| public func makeUIView(context: Context) -> UIVisualEffectView { | |
| let view = UIVisualEffectView() | |
| let blur = UIBlurEffect() | |
| let animator = UIViewPropertyAnimator() | |
| animator.addAnimations { view.effect = blur } | |
| animator.fractionComplete = 0 | |
| animator.stopAnimation(false) | |
| animator.finishAnimation(at: .current) | |
| return view | |
| } | |
| func updateUIView(_ uiView: UIVisualEffectView, context: Context) { } | |
| } | |
| /// A transparent View that blurs its background | |
| struct BackdropBlurView: View { | |
| let radius: CGFloat | |
| @ViewBuilder | |
| var body: some View { | |
| BackdropView().blur(radius: radius, opaque: true) | |
| } | |
| } |
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| struct ContentView: View { | |
| var body: some View { | |
| Text("Hello, World!") | |
| .padding() | |
| .backdropEffect { backdrop in | |
| backdrop | |
| .blur(radius: 30, opaque: true) | |
| .saturation(10.8) | |
| } | |
| } | |
| } | |
| extension View { | |
| func backdropEffect(@ViewBuilder _ backdropBuilder: (Backdrop) -> some View) -> some View { | |
| background { | |
| backdropBuilder( | |
| Backdrop() | |
| ) | |
| } | |
| } | |
| } | |
| struct Backdrop: UIViewRepresentable { | |
| func makeUIView(context: Context) -> some UIView { | |
| return BackdropLayerView() | |
| } | |
| func updateUIView(_ uiView: UIViewType, context: Context) { | |
| } | |
| class BackdropLayerView: UIView { | |
| override class var layerClass: AnyClass { | |
| return NSClassFromString("CABackdropLayer") as! CALayer.Type | |
| } | |
| } | |
| } |
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