hello

I don't think there is a way to adjust lighting but here is how to make a counter

Code Block 
@State var counter: Int = 0
    var body: some View {
        VStack {
            Text("\(counter)")
            Button("Count Up") {
                counter += 1
            }
            
            Button("Count Down") {
                counter -= 1
            }
         
        }
      

there is a way to adjust the device brightness by pressing a button but that will not work like you want it to.

I will try to do justice to it, show it to me
I tried it, the screen turned off and the button stayed on, but I couldn't connect the brightness to a button
Because I don't know how
At first I was going to link the button and the counter with the volume up and down button, but it is forbidden, then I got this idea

You cannot change a button behaviour. That's forbidden.

But to control brightness:
        UIScreen.main.brightness = 0.1 // between 0 and 1

Could you place the order here please

---

Code Block
@State var counter: Int = 0 
  var body: some View {   
    VStack {     
      Text("\(counter)") 
          Button("Count Up") {                counter += 1            }                        Button("Count Down") {                counter -= 1            }                 }     

Type '()' cannot conform to 'View'; only struct/enum/class types can conform to protocols

I am showing this error

What did you post ? Could you edit it properly so we can understand what it is ?

ZStack {

            LinearGradient(gradient: Gradient(colors: [Color.orange, Color.yellow, Color.white]), startPoint: .top, endPoint: .bottom)



                .edgesIgnoringSafeArea(.all)

                SwiftUIView()

                boton()

          

                    .font(Font.system(size: 80))

                    .offset(x: 10, y: -10)

            

        }

        UIScreen.main.brightness = 0.1 // between 0 and 1





    }

}

struct ContentView_Previews: PreviewProvider {

    static var previews: some View {

        ContentView()

    }

}

Please,

• explain what is your question

• take some care when you post code to make it easier to read:

Code Block 
ZStack {
            LinearGradient(gradient: Gradient(colors: [Color.orange, Color.yellow, Color.white]), startPoint: .top, endPoint: .bottom)
                .edgesIgnoringSafeArea(.all)
                SwiftUIView()
                boton()
                    .font(Font.system(size: 80))
                    .offset(x: 10, y: -10)
        }
        UIScreen.main.brightness = 0.1 // between 0 and 1
    }
}
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

what do you do with line 12, copied in the middle of the code ? It should be inside some func (like a Button action)
what is boton() ?

import SwiftUI

struct boton: View {

    

    @State var boton : String = "S"

    var body: some View {

        

                

        

        VStack {

            

            Text("bnvnb: \(boton)")

            

            Button(action: {

                self.boton = self.boton + "S"

                        

            } ) {

                

                /*@START_MENU_TOKEN@*/Text("Button")/*@END_MENU_TOKEN@*/

                    

            }

            

        }

        

    }

    

}

Code Block 
 

This is the button file you recalled

I don't know how to arrange the text Sorry, but I want to control the brightness. Can you create a code and slider ?
How was this important code with the lighting control feature so that the user can modify the lighting from within the application, not through the system by pulling the tape!