Missing arguments for parameters even when initialised-CodePudding

I am trying to call a detailed view of an item when an item is tapped. In this case, the item is a pair of trousers in the MarketplaceTrouserView. When I call TrouserDetailView, I get an error. This must be to do with initialising but I've repeatedly tried this and failed. What could be the solution?

MarketplaceTrouserView:

import SwiftUI

struct MarketplaceTrouserView: View {
   
    @StateObject var MarketplaceModel = MarketplaceViewModel()
    @State private var selectedMarketplaceFilter: MarketplaceFilterViewModel = .trouser
    @State var showDetailTrouser = false
    @State var selectedTrouser : Trouser!
    @EnvironmentObject var sharedData: SharedDataModel
    
    var body: some View {
        
        var columns = Array(repeating: GridItem(.flexible()), count: 2)
        
        ZStack{  
            VStack{        
                HStack {
                    
                    Text("Find Trousers To Buy")
                }
                    }
            }                
                if MarketplaceModel.trousers.isEmpty{
                    
                    ProgressView()
                }
                else{
                    
                    ScrollView {

                        LazyVGrid(columns: Array(repeating: GridItem(.flexible(),spacing: 10), count: 2),spacing: 20){
                            
                            ForEach(MarketplaceModel.filteredTrouser){trouser in
                                
                                // Trouser items in grid view 
                                
                                    TrouserView(trouserData: trouser)
                                    

                                        .onTapGesture {
                                            
                                            withAnimation {
 
                                                selectedTrouser = trouser
                                                showDetailTrouser.toggle()
                                            }
                                        }
                            }
                        }
                    }
                }
            }
            
            if selectedTrouser != nil && showDetailTrouser{
                
                TrouserDetailView(/*Here is the error asking for trouserData & showDetailTrouser*/)
                
            }
       }
}

}

TrouserDetailView:

import SwiftUI
import SDWebImageSwiftUI

struct TrouserDetailView: View {
    @State var trouserData : Business
    @State var showDetailTrouser: Bool
    @EnvironmentObject var sharedData: SharedDataModel    
    @EnvironmentObject var marketplaceData: MarketplaceViewModel
       
    
    
    var body: some View {
        
    ScrollView {
        
        VStack{
            
            HStack {
                
                Button(action: {

                                        withAnimation(.easeOut){showDetailTrouser.toggle()}

                                    }) {
                                        Image(systemName: "arrow.backward.circle.fill")

                                    }

                
                    Text(trouserData.trouser_name)
            }
            
            VStack {
                
                WebImage(url: URL(string: trouserData.trouser_image))   

            }
            
        }
    }
        }

Trouser Model:

import SwiftUI
import FirebaseFirestoreSwift
import Firebase

struct Trouser: Identifiable, Codable {
    
    @DocumentID var id: String?
    var trouser_name: String = ""
    var trouser_image: String = ""
}

The error is when i call TrouserDetailView (as marked in the code)

CodePudding user response：

By the logic of provided code, state is not needed for the first one and second should be replaced with binding, ie.

struct TrouserDetailView: View {
    var trouserData : Trouser
    @Binding var showDetailTrouser: Bool

    // ...

and call

if selectedTrouser != nil && showDetailTrouser {
    
    TrouserDetailView(trouserData: selectedTrouser, 
                showDetailTrouser: $showDetailTrouser)
    
}

CodePudding user response：

@State var trouserData : Business @State var showDetailTrouser: Bool

These variables you must initialize the value locally or switch to @Binding to bind the data with the parent variables.