Error: Argument passed to call that takes no arguments SwiftUI - swift

Question

In my code I get this error and I cannot figure out how to resolve it. The error is in the Trailing block of code
struct Map: View {
#ObservedObject public var dataManager = DataManager.shared
#Binding public var seqId: String
// rz- to pass seqId to second view
// #State public var seqId2: String = ""
var body: some View {
ZStack {
VStack {
Text("Results").foregroundColor(Color.white).onAppear{self.dataManager.downloadSeqData(seqId: self.seqId)} .onAppear(perform: playSound)/*rz want to add this sound func to contentview somehow, otherwise it will constantly play sound when page loads */ .edgesIgnoringSafeArea(.all)
//rz- if strand is linear draw line
if dataManager.dataSet?.INSDSeq.topology == "linear" {
Rectangle()
.fill(Color.black)
.frame(width: 500, height: 20)
}
//rz- if strand is circular draw o
if dataManager.dataSet?.INSDSeq.topology == "circular" {
Circle()
.stroke(Color.black, style: StrokeStyle(lineWidth: 20, lineCap: .round, lineJoin: .round))
.frame(width: 500, height: 500)
}
if dataManager.dataSet?.INSDSeq.topology != "circular" && dataManager.dataSet?.INSDSeq.topology != "linear"{
Text("Data Unavailable, try a new accession number.")
}
}
.navigationBarItems(
//rz - added home and genbank view to navigation bars
leading:
NavigationLink(destination: ContentView()) {
Text("New Query")
.font(.title)
.foregroundColor(Color.black)
},
trailing:
NavigationLink(destination: Screen(seqId: self.$seqId)) {
Text("GenBank View")
.font(.title)
.foregroundColor(Color.black)
Error is in $seqId
NavigationLink(destination: Screen(seqId: self.$seqId)) {
Here is the Screen view
import SwiftUI
struct Screen: View {
#ObservedObject public var dataManager = DataManager.shared
#State private var seqId: String = ""
var body: some View {
VStack {
TextField("Enter Accession Number", text: $seqId)
.padding()
Button("Search")
{
dataManager.downloadSeqData(seqId: seqId)
}
ScrollView {
VStack(alignment: .leading) {
Text(dataManager.dataSet?.INSDSeq.locus ?? "")
.padding()
Text(dataManager.dataSet?.INSDSeq.organism ?? "").padding()
Text(dataManager.dataSet?.INSDSeq.source ?? "").padding()
Text(dataManager.dataSet?.INSDSeq.taxonomy ?? "").padding()
Text(dataManager.dataSet?.INSDSeq.topology ?? "").padding()
Text(dataManager.dataSet?.INSDSeq.length == nil ? "" : "\(dataManager.dataSet!.INSDSeq.length)") .padding()
Text(dataManager.dataSet?.INSDSeq.strandedness ?? "").padding()
Text(dataManager.dataSet?.INSDSeq.moltype ?? "").padding()
Text(dataManager.dataSet?.INSDSeq.sequence ?? "").padding()
}
.cornerRadius(10)
VStack(alignment: .leading, spacing: 10) {
ForEach(dataManager.featureList, id:\.self) { feature in
VStack (alignment: .leading){
VStack (alignment: .leading) {
Text(feature.INSDFeature_key).bold()
Text(feature.INSDFeature_location)
}.padding()
IntervalSection(feature: feature)
QualsSection(feature: feature)
}
.cornerRadius(10)
}
}
.cornerRadius(20)
}
.padding(.horizontal)
}
}
}
struct IntervalSection: View {
var feature: INSDFeature
var body: some View {
VStack (alignment: .leading){
ForEach(0..<feature.INSDFeature_intervals.count, id: \.self) { i in
ForEach(0..<feature.INSDFeature_intervals[i].INSDInterval.count, id: \.self) { j in
if let from = feature.INSDFeature_intervals[i].INSDInterval[j].INSDInterval_from {
VStack (alignment: .leading){
Text("\(from)").bold()
Text("\(feature.INSDFeature_intervals[i].INSDInterval[j].INSDInterval_to ?? -1)")
}
.padding()
.cornerRadius(10)
}
}
}
}
}
}
struct QualsSection: View{
var feature: INSDFeature
var body: some View {
VStack (alignment: .leading){
ForEach(0..<feature.INSDFeature_quals.count , id: \.self) { i in
ForEach(0..<feature.INSDFeature_quals[i].INSDQualifier.count , id: \.self) { j in
VStack (alignment: .leading){
Text(feature.INSDFeature_quals[i].INSDQualifier[j].INSDQualifier_name).bold()
Text(feature.INSDFeature_quals[i].INSDQualifier[j].INSDQualifier_value)
}
.padding()
.cornerRadius(10)
}
}
}
}
}

Answer 1

In SwiftUI you should use Binding instead of State in cases, where the data is coming from another view. Furthermore both attributes of Screen are private, therefore they can't be accessed in this case set from outside of the struct itself.
I would suggest to make seqID in Screen public like you did it with dataManager and change it to State