SwiftUI AVCaptureSession Freezes other Views in a VStack or ScrollView - ios

Question

I have a view which contains some few texts, button and camera view inside a scroll view
VStack {
ZStack{
ScrollView{
HStack(alignment: .top) {
LogoMainView()
}
.frame(maxWidth: .infinity, maxHeight: 44, alignment: .leading)
.padding(.horizontal,5)
VStack{
HeaderText(title:"Some header")
ParagraphText(text:"Some random text")
CameraDropDown(
toggleFront:{
self.captureSession.changeOrientation(orientation: .front)
},toggleBack: {
self.captureSession.changeOrientation(orientation: .back)
})
CameraView()
.onAppear(){
self.appDelegate.captureSession.setup()
self.appDelegate.captureSession.start()
}
.onDisappear(){
self.appDelegate.captureSession.stop()
}
.onChange(of: self.appDelegate.captureSession.orientation){
newvalue in
self.appDelegate.captureSession.orientation = newvalue
self.appDelegate.captureSession.setup()
self.appDelegate.captureSession.start()
}
}
.padding(.horizontal,10)
}
}
}
.clipped()
}
Whenever the camera starts on clicking CameraDropDown it should change the orientation but expanding then choosing the desired orientation but when the CameraView() is running i.e (the camera is showing) it just does not respond to touches but when i switch of the CameraView() it the responds to the touchess and orientation changes.
What i have tried is to profile for hangs but i could not get a hang.
here is my cameraclass
//
// CaptureSession.swift
import Foundation
import AVFoundation
import SwiftUI
class CaptureSession: NSObject, ObservableObject {
#Published var sampleBuffer: CMSampleBuffer?
#Published var orientation: AVCaptureDevice.Position = .back
var captureSession: AVCaptureSession?
func setup() {
var allowedAccess = false
let blocker = DispatchGroup()
blocker.enter()
AVCaptureDevice.requestAccess(for: .video) { flag in
allowedAccess = flag
blocker.leave()
}
blocker.wait()
if !allowedAccess { return }
if !allowedAccess {
print("Camera access is not allowed.")
return
}
let session = AVCaptureSession()
session.beginConfiguration()
let videoDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: orientation)
guard videoDevice != nil, let videoDeviceInput = try? AVCaptureDeviceInput(device: videoDevice!), session.canAddInput(videoDeviceInput) else {
print("Unable to detect camera.")
return
}
session.addInput(videoDeviceInput)
session.commitConfiguration()
let videoOutput = AVCaptureVideoDataOutput()
videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue(label: "SampleBuffer"))
if (session.canAddOutput(videoOutput)) {
session.addOutput(videoOutput)
}
self.captureSession = session
}
func start() {
guard let captureSession = self.captureSession else {
return
}
if (!captureSession.isRunning) {
DispatchQueue.global(qos: .default).async {
captureSession.startRunning()
}
}
}
func stop() {
guard let captureSession = self.captureSession else {
return
}
if (captureSession.isRunning) {
captureSession.stopRunning()
}
}
func changeOrientation(
orientation:AVCaptureDevice.Position) {
guard let captureSession = self.captureSession else {
return
}
if(captureSession.isRunning){
DispatchQueue.main.async {
self.orientation = orientation
self.setup()
self.start()
}
}else{
DispatchQueue.main.async {
self.orientation = orientation
self.setup()
self.start()
}
}
}
}
extension CaptureSession: AVCaptureVideoDataOutputSampleBufferDelegate {
func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
DispatchQueue.main.async {
self.sampleBuffer = sampleBuffer
}
}
}
how can I make the camera run and also respond to the touches for the other views that I have or what am I doing wrong here? Please help.