swift - Is there a method to blur a background in SwiftUI?

Question

I'm looking to blur a view's background but don't want to have to break out into UIKit to accomplish it (eg. a UIVisualEffectView) I'm digging through docs and got nowhere, seemingly there is no way to live-clip a background and apply effects to it. Am I wrong or looking into it the wrong way?

Answer 1

1. The Native SwiftUI way:

Just add .blur() modifier on anything you need to be blurry like:

Image("BG")
   .blur(radius: 20)

_{Note the top and bottom of the view}

Note that you can Group multiple views and blur them together.

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2. The Visual Effect View:

You can bring the prefect UIVisualEffectView from the UIKit:

VisualEffectView(effect: UIBlurEffect(style: .dark))

With this tiny struct:

struct VisualEffectView: UIViewRepresentable {
    var effect: UIVisualEffect?
    func makeUIView(context: UIViewRepresentableContext<Self>) -> UIVisualEffectView { UIVisualEffectView() }
    func updateUIView(_ uiView: UIVisualEffectView, context: UIViewRepresentableContext<Self>) { uiView.effect = effect }
}

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3. iOS 15: Materials

You can use iOS predefined materials with one line code:

.background(.ultraThinMaterial)