.onTapGesture Get Scrollview Item Data - uiscrollview

Question

My full project is here https://github.com/m3rtkoksal/TaskManager
I have made SelectedTask an environment object as below
let context = persistentContainer.viewContext
let contentView = ContentView()
.environmentObject(observer())
.environmentObject(SelectedTask())
.environment(\.managedObjectContext,context)
In my TaskElement model I have created another class called SelectedTask as below
class SelectedTask: ObservableObject {
#Published var item = [TaskElement]()
func appendNewTask(task: TaskElement) {
objectWillChange.send()
item.append(TaskElement(title: task.title, dateFrom: task.dateFrom , dateTo: task.dateTo , text: task.text))
}
}
I am trying to fetch an item inside the scroll view and get its data to be able to modify it in the NewTaskView as below
struct ScrollViewTask: View {
#ObservedObject private var obser = observer()
#EnvironmentObject var selectedTask : SelectedTask
#State var shown: Bool = false
var body: some View {
ScrollView(.vertical) {
VStack {
ForEach(self.obser.tasks) { task in
TaskElementView(task:task)
.onTapGesture {
self.selectedTask.objectWillChange.send()
self.selectedTask.appendNewTask(task: task) //THREAD 1 ERROR
print(task)
self.shown.toggle()
}
}
}
}
.onAppear {
self.obser.fetchData()
}
.fullScreenCover(isPresented: $shown, content: {
NewTaskView(isShown: $shown)
.environmentObject(selectedTask)
})
}
}
But when I tap one of the items in scrollview I am getting a Thread 1 error #self.selectedTask.appendNewTask(task: task)
Thread 1: Fatal error: No ObservableObject of type SelectedTask found. A View.environmentObject(_:) for SelectedTask may be missing as an ancestor of this view.
If I change as ScrollViewTask().environmentObject(self.obser)
then this happens
This is how my TaskFrameView is called
import SwiftUI
struct TaskListView: View {
#State private(set) var data = ""
#State var isSettings: Bool = false
#State var isSaved: Bool = false
#State var shown: Bool = false
#State var selectedTask = TaskElement(title: "", dateFrom: "", dateTo: "", text: "")
var body: some View {
NavigationView {
ZStack {
Color(#colorLiteral(red: 0.9333333333, green: 0.9450980392, blue: 0.9882352941, alpha: 1)).edgesIgnoringSafeArea(.all)
VStack {
TopBar()
HStack {...}
CustomSegmentedView()
ZStack {
TaskFrameView() // scrollview inside
VStack {
Spacer()
HStack {...}
}
NavigationLink(
destination: NewTaskView(isShown: $shown).environmentObject(selectedTask),
isActive: $shown,
label: {
Text("")
})
}
}
}
.navigationBarHidden(true)
Spacer()
}
.navigationBarHidden(true)
}
}

Answer 1

It looks like the selectedTask is not injected to the TaskListView.
Find the place where you call TaskListView() and inject the selectedTask as an EnvironmentObject.
In ContentView:
struct ContentView: View {
#EnvironmentObject var selectedTask : SelectedTask
...
TaskListView().environmentObject(selectedTask)
Also don't create new instances of selectedTask like:
#State var selectedTask = TaskElement(title: "", dateFrom: "", dateTo: "", text: "")
Get the already created instance from the environment instead:
#EnvironmentObject var selectedTask: SelectedTask

Answer 2

call scroll view by sending the observer object as environment object modifier
ScrollViewTask().environmentObject(self. observer)