48 lines
1.2 KiB
Swift
48 lines
1.2 KiB
Swift
import SwiftUI
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import SwiftUINavigation
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private let readMe = """
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This demonstrates to use the IfLet view to unwrap a binding of an optional into a binding of \
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an honest value.
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Tap the "Edit" button to put the form into edit mode. Then you can make changes to the message \
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and either commit the changes by tapping "Save", or discard the changes by tapping "Discard".
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"""
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struct IfLetCaseStudy: View {
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@State var string: String = "Hello"
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@State var editableString: String?
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var body: some View {
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Form {
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Section {
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Text(readMe)
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}
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IfLet(self.$editableString) { $string in
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TextField("Edit string", text: $string)
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HStack {
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Button("Discard") {
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self.editableString = nil
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}
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Button("Save") {
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self.string = string
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self.editableString = nil
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}
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}
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} else: {
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Text("\(self.string)")
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Button("Edit") {
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self.editableString = self.string
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}
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}
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.buttonStyle(.borderless)
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}
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}
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}
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struct IfLetCaseStudy_EditStringView_Previews: PreviewProvider {
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static var previews: some View {
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IfLetCaseStudy()
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}
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}
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