add callbacks to view swiftui
struct MyComponen: View {
@Binding var alert: String
var action: (() -> Void)?
var body: some View {
VStack {
Text("Alert: \(alert)")
if nil != action {
Button(action: action!) {
Text("Action")
}
}
}
}
}
extension MyComponen {
func foo(perform action: @escaping () -> Void ) -> Self {
var copy = self
copy.action = action
return copy
}
}
struct TestCustomModifier: View {
@State var message = "state 2"
var body: some View {
VStack {
MyComponen(alert: .constant("state 1"))
MyComponen(alert: $message).foo(perform: {
print(">> got action")
})
}
}
}
struct TestCustomModifier_Previews: PreviewProvider {
static var previews: some View {
TestCustomModifier()
}
}