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@mattyoung
Last active June 29, 2021 11:18
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private struct OnFirstAppear: ViewModifier {
let perform: () -> Void
let `else`: () -> Void
@State private var firstTime = true
func body(content: Content) -> some View {
content.onAppear {
if firstTime {
firstTime = false
perform()
} else {
`else`()
}
}
}
}
private struct OnNotFirstAppear: ViewModifier {
let perform: () -> Void
@State private var firstTime = true
func body(content: Content) -> some View {
content.onAppear {
if firstTime {
firstTime = false
} else {
perform()
}
}
}
}
extension View {
func onFirstAppear(perform: @escaping () -> Void, else: @escaping () -> Void = { }) -> some View {
modifier(OnFirstAppear(perform: perform, else: `else`))
}
func onNotFirstAppear(perform: @escaping () -> Void) -> some View {
modifier(OnNotFirstAppear(perform: perform))
}
}
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