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()
    }
}

Source: stackoverflow.com

Similar codes

0 vote241 views1 answer
Mac os
Swift
0 vote239 views2 answers
Check if string is nil swift
Swift
0 vote241 views1 answer
Undefined symbol __swift_force_load_$swift webkit react native
Swift
2 votes287 views1 answer
Swift array to string
Swift
0 vote197 views1 answer
How to read music library from iphone programmatically in swift
Swift
1 vote261 views1 answer
Swift get day from available string
Swift
0 vote228 views1 answer
Swift string time to epoch
Swift
0 vote252 views1 answer
Swiftui rectangle top corners radius
Swift
3 votes188 views1 answer
Variable declaration vs definition vs initialization
Swift
1 vote223 views1 answer
Uiimageview add tap gesture swift
Swift