Thread 1: Fatal error: No ObservableObject of type msgDatas found. A View.environmentObject(_:) for msgDatas may be missing as an ancestor of this view.

UI Frameworks SwiftUI
skysoft13 OP
Created Mar ’21
Replies 30
Boosts 0
Views 3.2k
Participants 3
It throw fatal error for data in "  self.data.selectedData = i", even I try to calling @State for solve, but nothing change.

Main:
Code Block 
struct Main : View {
   
  @EnvironmentObject var data : msgDatas
  @State var show: Bool = false
   
  var body : some View{
     
    List(msgs){i in
       
      cellView(pic: i.pic, name: i.name, msg: i.msg, time: i.time, msgs: i.msgs).onTapGesture {
         
        self.data.selectedData = i
        self.show.toggle()
      }
    }
  }
}

cellView:

Code Block struct cellView : View {
   
  var pic : String
  var name : String
  var msg : String
  var time : String
  var msgs : String
   
  var body : some View{
     
    HStack(spacing: 15){
       
      Image(pic).resizable().frame(width: 50, height: 50).clipShape(Circle())
       
      VStack(alignment:.leading,spacing: 5){
         
        Text(name)
        Text(msg).lineLimit(2)
      }
       
      Spacer()
       
      VStack(spacing: 10){
         
        Text(time)
        if msgs != ""{
           
          Text(msgs).padding(8).background(Color("bg")).foregroundColor(.white).clipShape(Circle())
        }
        else{
           
          Spacer()
        }
      }
       
    }.padding(9)
  }
}


Replies  30
Boosts  0
Views  3.2k
Participants  3
OOPer OP
Mar ’21

I try to calling @State

That means @State cannot be a solution to solve No ObservableObject.
Please show your code instantiating Main.
0
skysoft13 OP
Mar ’21
I did not get it what u mean?
0
OOPer OP
Mar ’21

I did not get it what u mean?

To solve Fatal Error: No ObservableObject ..., you need to call environmentObject(_:) somewhere in your code.
Adding an @State variable has nothing to do with solving No ObservableObject.
0
skysoft13 OP
Mar ’21
here it is, 

Code Block class msgDatas : ObservableObject{
   
  @Published var show : Bool = false
  @Published var selectedData : msgType = .init(id: -1, msg: "", time: "", msgs: "", name: "", pic: "")
}


0
OOPer OP
Mar ’21

here it is, 

Where? Or what is it?

I first wrote Please show your code instantiating Main.
Your newly shown code does not contain anything about Main.

I then wrote you need to call environmentObject(_:) somewhere in your code.
But I cannot find environmentObject anywhere?
0
skysoft13 OP
Mar ’21
brother in all question u are just asking interesting question, but no any solution, pls I need help. it is clear question.

SceneDelegate:

Code Block 
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
  var window: UIWindow?
  func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
    // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
    // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
    // Create the SwiftUI view that provides the window contents.
    let contentView = ContentView()
    let msgdata = msgDatas()
    
    // Use a UIHostingController as window root view controller.
    if let windowScene = scene as? UIWindowScene {
      let window = UIWindow(windowScene: windowScene)
      window.rootViewController = UIHostingController(rootView: contentView.environmentObject(msgdata))
      self.window = window
      window.makeKeyAndVisible()
    }
  }


0
OOPer OP
Mar ’21

u are just asking interesting question, but no any solution,

I am asking questions not for my interest, but for finding solutions.
And at last, you have shown a code which could be very helpful to find a solution.
(Sorry, but may not be enough.)

At a glance, I cannot find what's wrong and take some more time to explore.
0
skysoft13 OP
Mar ’21
I show all code, u are not intend to solve problems.



0
OOPer OP
Mar ’21
I tried your code and I could not reproduce the error No ObservableObject.

I needed to guess many parts you have not shown, so that may be causing the difference.

Once, again. Please show your code instantiating Main.
(Please do not omit the declaration header, and please include all relevant codes.)
0
OOPer OP
Mar ’21

I show all code, u are not intend to solve problems.

Far from all code. I get an error Cannot find 'msgs' in scope with your Main.

If you really want to solve your issue, please show enough info to solve it.
0
skysoft13 OP
Mar ’21
here it is I gave some code about it:

Code Block struct msgType : Identifiable {
   
  var id : Int
  var msg : String
  var time : String
  var msgs : String
  var name : String
  var pic : String
}
// I already made a sample data....
var msgs : [msgType] = [
   
  msgType(id: 0, msg: "New Album Is Going To Be Released!!!!", time: "14:32", msgs: "2", name: "Taylor", pic: "p0") 
]


0
OOPer OP
Mar ’21

here it is I gave some code about it:

Sorry, but you tend to omit the first line of codes. What sort of line comes before var id : Int

And again, Please show your code instantiating Main.

In other words, please show all the code including Main().
0
skysoft13 OP
Mar ’21 
Code Block struct chatTopview : View {
   
  @EnvironmentObject var data : msgDatas
  @State var show: Bool = false
   
   
  var body : some View{
     
     
    HStack(spacing : 15){
       
      Button(action: {
         
        self.data.show.toggle()
         
      }) {
         
        Image(systemName: "control").font(.title).rotationEffect(.init(degrees: -90))
      }
       
      Spacer()
       
      VStack(spacing: 5){
         
        Image(data.selectedData.pic).resizable().frame(width: 45, height: 45).clipShape(Circle())
         
        Text(data.selectedData.name).fontWeight(.heavy)
         
      }.offset(x: 25)
       
       
      Spacer()
       
      Button(action: {
         
      }) {
         
        Image(systemName: "phone.fill").resizable().frame(width: 20, height: 20)
         
      }.padding(.trailing, 25)
       
      Button(action: {
         
      }) {
         
        Image(systemName: "video.fill").resizable().frame(width: 23, height: 16)
      }
       
      }.foregroundColor(.white)
      .padding()
  }
}

and chatCell:

Code Block struct chatCell : View {
   
  var data : msgdataType
   
  var body : some View{
     
    HStack{
       
      if data.myMsg{
         
        Spacer()
         
        Text(data.msg)
          .padding()
          .background(Color("bg"))
          .clipShape(msgTail(mymsg: data.myMsg))
          .foregroundColor(.white)
      }
      else{
         
        Text(data.msg)
          .padding()
          .background(Color("txtbox"))
          .clipShape(msgTail(mymsg: data.myMsg))
         
        Spacer()
      }
       
    }.padding(data.myMsg ? .leading : .trailing, 55)
    .padding(.vertical,10)
  }
}


0
OOPer OP
Mar ’21
Thanks for showing additional codes. But what relation are there between chatTopview or chatCell and already shown codes?

In your actual project, chatTopview is the actual Main? Or something else? I cannot find any lines including Main().

Please understand, we readers do not have any info about what you want to do or how your project is made, Please, please show enough info, if you really want to collaborate with readers to solve your issue.
0
skysoft13 OP
Mar ’21 
Code Block struct Home: View {
  @EnvironmentObject var data : msgDatas
  @State var show: Bool = false
 
   
  var body : some View{
     
    ZStack{
       
      Color("bg").edgesIgnoringSafeArea(.top)
       
      NavigationLink(destination: Chat(), isActive: self.$show) {
       
        Text("")
      }
      VStack{
         
        topView()
      }
    }
  }
}
struct topView : View {
   
  var body : some View{
     
    VStack{
       
      HStack(spacing: 15){
         
        Text("Chats").fontWeight(.heavy).font(.system(size: 23))
         
        Spacer()
         
        Button(action: {
           
        }) {
           
          Image(systemName: "magnifyingglass").resizable().frame(width: 20, height: 20)
        }
         
        Button(action: {
           
        }) {
           
          Image("menu").resizable().frame(width: 20, height: 20)
        }
         
      }
      .foregroundColor(Color.white)
      .padding()
       
      GeometryReader{_ in
         
        Main().clipShape(Rounded())
      }
    }
     
  }
}


0
Thread 1: Fatal error: No ObservableObject of type msgDatas found. A View.environmentObject(_:) for msgDatas may be missing as an ancestor of this view.
First post date Last post date
 
 
Q