I'm trying to make basic random numbers..swift

thanks for your attention. I'm super suuuuper new in coding.. I think it's a very basic but I can't figure it out,,

I'm trying to make 6 random numbers! like 'powerball', 'lotto', or any kind of random unique numbers required games! I'm trying with swiftUI

I can make a one random number.. like this way

struct ContentView: View {

@State private var showDetails = false


var body: some View {
    VStack {
        Spacer()
        if showDetails {
            
            Text("\(Int.random(in: 1...45))")
                .font(.largeTitle)
                
        }
        Button(action: {
            self.showDetails.toggle()
        }) {
            Text("BUTT")
                .padding(.bottom, 30)
        }
    }
    
    
}

and I can make it 6 times (Foreach) but there are overlap numbers!

And here is what I've done..

import SwiftUI


struct ContentView: View {

@State private var showDetails = false

var randomArray: [Int] = []
var randomNumbers = Int.random(in: 1...45)


var body: some View {
    VStack {
        Spacer()
        if showDetails {
            
            randomArray.append(randomNumbers)
            
            Text("\(randomArray)")
                .font(.largeTitle)
            
        }
        Button(action: {
            self.showDetails.toggle()
            
        }) {
            Text("BUTT")
                .padding(.bottom, 30)
        }
    }
    
    
}
}


struct ContentView_Previews: PreviewProvider {
static var previews: some View {
    ContentView()
}

}

it show me

'Type '()' cannot conform to 'View'; only struct/enum/class types can conform to protocols' 'Cannot use mutating member on immutable value: 'self' is immutable'

I think the 'randomArray' or 'randomNumers' are correct but 'randomArry.append(randomNumbers)' or Text("(randomArray)")' are maybe wrong..

I tried 2 day and I find a lot of things but I can't still make it.. so.. could you give me a little help? Thanks!