title: How to use variable inside the body of the view using swiftUI?
body: <p>i'm trying to using a variable and modify inside the foreach of swiftui.</p>
  
  <p>below are the code i'm using. please let me know how can i modify the value inside the body of the view.</p>
  
  <pre><code>struct SearchView : View {
  var chatmember = ChatMember(with: JSON())
  
  var body: some View{
      VStack(spacing: 10){
          VStack{
              prefView()
                  .padding(.bottom, 30)
              Text("Tap to start making friend")
          }
          ScrollView(.horizontal, content: {
              HStack(spacing: 10) {
                  ForEach(userDataList) { user in
                       chatmember = ChatMember(hashValue: 0, email: "", fullName: "", online: "", userId: user.userId, userImage: "", deviceToken: "", deviceType: .iOS, deviceId: "")
                      NavigationLink(destination: ChatView(chatMember: self.chatmember)){
                          SearchUser()
                      }
                  }
              }
              .padding(.leading, 10)
          })
              .frame(width: 300, height: 400)
  
          Spacer()
      }
      .navigationBarTitle("Profile",displayMode: .inline)
      .onAppear {
          self.userList()
      }
  }
  
  
  @State var userDataList = [UserModel]()
  func userList() {
      databaseReference.child(DatabaseNode.Users.root.rawValue).observe(.value) { (snapShot) in
          if snapShot.exists(){
  
              if let friendsDictionary = snapShot.value{
  
                  for each in friendsDictionary as! [String : AnyObject]{
                      print(each)
                      if let user = each.value as? [String : Any]{
                          let data = UserModel(userId: JSON(user["userId"] ?? "").stringValue, name: JSON(user["name"] ?? "").stringValue)
                          print(data)
                          self.userDataList.append(data)
                      }
                  }
              }
          }
      }
  }
  </code></pre>
  
  <p>}</p>
  
  <p>below are the error message i'm getting:</p>
  
  <pre><code>'Int' is not convertible to 'CGFloat?'
  </code></pre>
  
  <p>But this error message is not look correct for me. this error i'm getting because i tried to modify chatmember inside of foreach.</p>
  
  <p>Thanks</p>