If the ScrollView size (using GeometryReader) is greater than geo.size.height*0.85 then after navigating to the next screen the Back button does not operate (the app is frozen).
You should provide code of the View in which you have your ScrollView and the screen you are navigating to so that we can see what you are attempting to do.
Paste your code in as text, rather than providing a screenshot.
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```
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```
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//
// eventView.swift
// HappyTeen
//
// Created by Alain Bernay on 28/2/2022.
//
import SwiftUI
struct eventView: View {
@EnvironmentObject var modelM:MoodModel
@Environment(\.presentationMode) var presentationMode
var dbRecords: FetchedResults<DBRecord>
var body: some View {
GeometryReader { geo in
NavigationView {
ZStack {
if UIDevice.isIPad {
Image("background").resizable().scaledToFill().ignoresSafeArea(.all).opacity(0.3)
} else {
Image("background").ignoresSafeArea(.all).opacity(0.3)
}
VStack (alignment: .center) {
Spacer()
ScrollView (showsIndicators: false) {
LazyVGrid(columns: [GridItem(.flexible(), spacing: 4, alignment: .top), GridItem(.flexible(), spacing: 4, alignment: .top)], alignment: .center, spacing: 4) {
ForEach (modelM.moodData[0].situations) { event in
singleEvent(event: event)
}
} // LazzyVGrid
}
Spacer()
}.frame(width: geo.size.width*0.9, height: geo.size.height*0.85)
// WARNING: geo.size.height*0.85 is the maximum otherwise it causes problem with backbutton for the next View
// Add a custom back button & forward button
.toolbar {ToolbarItem(placement: .navigationBarLeading) {
Button(action: {self.presentationMode.wrappedValue.dismiss()}, label: {
HStack {Image(systemName: "arrow.left.circle").resizable().scaledToFit().frame(width: 16, height: 16)
Text("Back").font(.caption)}})}
ToolbarItem (placement: .principal) {
HStack {
if UIDevice.isIPad {
Text("Who is involved?")
.font(.title)
.padding(2)
.border(Color(.systemGreen), width: 1)
.foregroundColor(Color(.systemBlue))
} else {
Text("Who is involved?")
.font(.caption)
.padding(2)
.border(Color(.systemGreen), width: 1)
.foregroundColor(Color(.systemBlue))
}
if modelM.moodData[0].records[0].overallPositive {
Image(systemName: "face.smiling").resizable().scaledToFit().frame(width: 16, height: 16).background(Color(.systemGreen))
} else {
Image(systemName: "person").resizable().scaledToFit().frame(width: 16, height: 16).background(Color(.systemRed))
}
}
}
ToolbarItem(placement: .navigationBarTrailing) {
NavigationLink (destination: eventDetailsView(dbRecords: dbRecords)
.onAppear(perform: {modelM.initUITableView()}), label: {
HStack {Image(systemName: "arrow.right.circle").resizable().scaledToFit().frame(width: 16, height: 16)
Text("Next").font(.caption)}})}}.accentColor(Color(.systemRed)) // VStack
} // Zstack
}.navigationViewStyle(.stack).navigationBarBackButtonHidden(true).navigationBarHidden(true) // NavigationView
} // Geo
}
}
If size.height is greater than 0.85 when I use the Next button it goes to the eventDetailsView which has a Back button. When pressing the Back button it becomes grey then nothing happens, the app is frozen. I have to kill the app.
This situation is happening also for other Views that have similar codes.