how to autocapture an image from camera by using UIImagePickerController in swift - swift

Question

I am trying to capture a picture automatically from camera without clicking the camera capture-button and i am using the UIImagePickerController for camera usage.what should I have to add for autocapture?
class ViewController:UIViewController,UINavigationControllerDelegate,UIImagePickerControllerDelegate
{
var imagePicker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
imagePicker.delegate = self
self.openCamera()
}
func openCamera() {
if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerController.SourceType.camera)) {
imagePicker.sourceType = UIImagePickerController.SourceType.camera
imagePicker.allowsEditing = true
self.present(imagePicker, animated: true, completion: nil)
} else {
let alert = UIAlertController(title: "Warning", message: "You don't have camera", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
self.imagePicker.dismiss(animated: true, completion: nil)
guard let selectedImage = info[.originalImage] as? UIImage
else{
print("Image not found!")
return
}
}
Here I am clicking the capture button. But I want to take automatically a picture after autofocusing.

Answer 1

It is possible using UIImagePickerController as I R&D on this functionality.
If you want to autocapture an image from camera then you can use this below mentioned code.
1. First you need to Add AVFoundation framework in your project.
Select project -> Add AVFoundation framework in Frameworks, Libraries, and Embedded Content Section
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UIGestureRecognizerDelegate {
let objCaptureSession = AVCaptureSession()
var objPreviewLayer : AVCaptureVideoPreviewLayer?
var objCaptureDevice : AVCaptureDevice?
var objImagePicker = UIImagePickerController()
var objTimer: Timer?
var flagRepeatRecording: Bool = false
var objOutputVolumeObserve: NSKeyValueObservation?
let objAudioSession = AVAudioSession.sharedInstance()
override func viewDidAppear(_ animated: Bool) {
if !flagRepeatRecording {
if UIImagePickerController.isSourceTypeAvailable(.camera) {
objImagePicker = UIImagePickerController()
objImagePicker.delegate = self
objImagePicker.sourceType = .camera
objImagePicker.allowsEditing = false
objImagePicker.showsCameraControls = false
//imagePicker.mediaTypes = [kUTTypeMovie as String] // If you want to start auto recording video by camera
} else {
debugPrint("Simulator has no camera")
}
self.present(self.objImagePicker, animated: true, completion: {
self.objImagePicker.takePicture() // If you want you auto start video capturing then replace this code with take picture() method startVideoCapture()
NotificationCenter.default.addObserver(self, selector: #selector(self.cameraIsReady), name: .AVCaptureSessionDidStartRunning, object: nil)
flagRepeatRecording = true
}
}
#objc func cameraIsReady(notification: NSNotification) {
DispatchQueue.main.async {
self.objImagePicker.takePicture()
}
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
// let tempImage = info[UIImagePickerController.InfoKey.mediaURL] as! NSURL?
// let pathString = tempImage?.relativePath
self.dismiss(animated: true, completion: {})
// UISaveVideoAtPathToSavedPhotosAlbum(pathString!, self, nil, nil)
self.objTimer?.invalidate()
self.objTimer = nil
}
}