Created
August 12, 2021 03:38
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A placeholder that expands to fill the remaining screen height
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// Created by Matt Comi on 12/8/21. | |
import SwiftUI | |
struct HeaderView: View { | |
var body: some View { | |
VStack(spacing: 6) { | |
Text("Stampy").font(.title).foregroundColor(.purple).fontWeight(.heavy) | |
Text("Your Digital Stamp Collection").font(.footnote).foregroundColor(.secondary) | |
} | |
.padding(32) | |
.frame(maxWidth: .infinity, maxHeight: .infinity) | |
.background(Color(UIColor.secondarySystemBackground)) | |
.mask(RoundedRectangle(cornerRadius: 20, style: .continuous)) | |
.padding(16) | |
} | |
} | |
struct PlaceholderView: View { | |
var body: some View { | |
Text("Your Stamp Collection is Empty").foregroundColor(.secondary) | |
} | |
} | |
struct HeightPreferenceKey: PreferenceKey { | |
typealias Value = CGFloat | |
static var defaultValue: Value = .zero | |
static func reduce(value _: inout CGFloat, nextValue _: () -> CGFloat) {} | |
} | |
struct ContentView: View { | |
@State var headerHeight: CGFloat = 0 | |
var body: some View { | |
GeometryReader { screenGeo in | |
ScrollView { | |
VStack(spacing: 0) { | |
HeaderView() | |
.background( | |
GeometryReader { geo in | |
Color.clear.preference(key: HeightPreferenceKey.self, value: geo.size.height) | |
} | |
) | |
.onPreferenceChange(HeightPreferenceKey.self) { value in | |
headerHeight = value | |
} | |
PlaceholderView() | |
.frame(height: screenGeo.size.height - headerHeight) | |
} | |
} | |
} | |
} | |
} | |
struct ContentView_Previews: PreviewProvider { | |
static var previews: some View { | |
ContentView() | |
} | |
} |
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