grid-demo.swift

struct ContentView: View {
    let collums = [
        /// define number of caullum here 
        GridItem(.flexible()),
        GridItem(.flexible())
    ]
    var body: some View {
        ScrollView(.vertical) { //set .horizontal to scroll horizontally
            LazyVGrid(columns: collums) { // use HGrid to layout horizontally 
                ForEach(0...50, id: \.self) { i in
                    Text("Grid: \(i)").frame(width: 100, height: 100, alignment: .center)
                }
            }
        }
    }
}

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