Created
March 9, 2021 02:01
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OnLayout Tutorial 11
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struct MainView: View { | |
/// Controls the amount of padding above the scroll view's | |
/// content. | |
@State var titleBarHeight: CGFloat = 123 | |
var body: some View { | |
ScrollView { | |
HStack { | |
Spacer() | |
Text("ScrollView Content") | |
.multilineTextAlignment(.center) | |
.foregroundColor(.white) | |
.background(Color.blue.brightness(0.2)) | |
Spacer() | |
} | |
/// Pad the top of the content based on the value | |
/// of `titleBarHeight`. | |
.padding(.top, titleBarHeight) | |
} | |
.background(Color.blue) | |
.overlay( | |
TitleBar() | |
/// Update the `titleBarHeight` every time the | |
/// title bar view changes. | |
.onLayout { proxy in | |
titleBarHeight = proxy.size.height | |
}, | |
alignment: .top | |
) | |
.edgesIgnoringSafeArea(.all) | |
} | |
} | |
struct TitleBar : View { | |
var body: some View { | |
HStack { | |
Text("Title") | |
.frame(alignment: .center) | |
.foregroundColor(.white) | |
Spacer() | |
} | |
.padding( | |
EdgeInsets( | |
top: 50, | |
leading: 16, | |
bottom: 16, | |
trailing: 16 | |
) | |
) | |
.background(Color.red.opacity(0.5)) | |
} | |
} |
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