[移动开发]SwiftUI:@State @ObservedObject

import SwiftUI

class DataClass :ObservableObject {
    @Published var number:Double = 0.0
}
struct DataStruct {
    var number:Double = 0.0
}

struct ContentView: View {
    @State var number:Double = 0.0
    @ObservedObject var dataClass = DataClass()
    @State var dataStruct = DataStruct()
    
    var body: some View {
        VStack {
            VStack {
                Text("class:\(dataClass.number)").padding()
                Slider(value: $dataClass.number, in:0.0...10.0)
            }
            
            VStack {
                Text("struct:\(dataStruct.number)").padding()
                Slider(value: $dataStruct.number, in:0.0...10.0)
            }
            
            VStack {
                Text("normal:\(number)").padding()
                Slider(value: $number, in:0.0...10.0)
            }
        }
    }
}