如何在 SwiftUI 中的 body 属性内显示函数内的值？

Question

I am making an app that requires me to use an ml model and is performing its calculation to get the output from the ml model inside a function, now I need to display that constant which stores the final output of that ml model inside the body property of my swift UI view so that I can present it inside Text() maybe and modify the way it looks Lil bit all of this code is inside a single swift file

here is all the code

after making the changes it's still showing some error

struct newView: View {
    
    let model = AudiCar()
    
    @ObservedObject var values: impData
   @State var price = ""
    var body: some View {
        Text("calculated price is " + price)
                    .onAppear {
                        calculatePrice()
    }

    func calculatePrice() {  <- this is where it showing error, saying " Closure containing a declaration cannot be used with function builder 'ViewBuilder' " 
        
       do {
        let AudiCarOutput =  try model.prediction(model: String(values.nameSelection), year: Double(values.yearSelection), transmission: String(values.transmisssionSelec), mileage: Double(values.mileage), fuelType: String(values.fuelSelection))
            
           let price = String(AudiCarOutput.price)

       }

       catch {

       }
 
    }

   
}

struct newView_Previews: PreviewProvider {
    static var previews: some View {
        newView(values: impData())
    }
}

Answer 1

try something like this:

struct NewView: View {
    let model = AudiCar()
    @ObservevedObject var values: impData
    
    @State var price = ""
    
    var body: some View {
        Text("calculated price is " + price)
            .onAppear {
                calculatePrice()
            }
    }
    
    func calculatePrice() {
        do {
            ...
           price = String(AudiCarOutput.price)
        }
        catch {
            ...
        }
    }
}