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How to mask one view with another

Paul Hudson    @twostraws   

Fully updated for Xcode 11 GM

SwiftUI gives us the mask() modifier for masking one with another, which means you can mask an image using text or an image using an image, or more.

For example, this creates a 300x300 image of stripes, then masks it using the text “SWIFT!” so that the letters act as a cut out for the image:

Image("stripes")
    .resizable()
    .frame(width: 300, height: 300)
    .mask(Text("SWIFT!")
        .font(Font.system(size: 72).weight(.black)))

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