UIImagePickerController throwing SIGABRT - ios

Question

I am experimenting with UIImagePickerController to allow photos to be selected from either the library or by taking a photo with the camera.
I followed the steps on a website (https://makeapppie.com/2016/06/28/how-to-use-uiimagepickercontroller-for-a-camera-and-photo-library-in-swift-3-0/) and got this working for the photo library but whenever I try to invoke the camera from my app it gives the error "Thread 1: signal SIGABRT".
This is the code that I am using to invoke the camera:
picker.allowsEditing = false
picker.sourceType = UIImagePickerControllerSourceType.camera
picker.cameraCaptureMode = .photo
picker.modalPresentationStyle = .fullScreen
present(picker,animated: true,completion: nil)
It was my understanding that the SIGABRT error would be expected inside the simulator. However when I tried it on my iPhone 7 I expected it to work and it gave the same error.
I have added the "Privacy - Camera Usage Description" to the Info.plist file.
Any ideas what I have done wrong?

Answer 1

Here's my full code for using/selecting
// MARK: Camera App
func openCameraApp() {
if UIImagePickerController.availableCaptureModes(for: .rear) != nil {
picker.allowsEditing = false
picker.sourceType = UIImagePickerControllerSourceType.camera
picker.cameraCaptureMode = .photo
picker.modalPresentationStyle = .fullScreen
present(picker,
animated: true,
completion: nil)
} else {
noCamera()
}
}
func noCamera(){
let alertVC = UIAlertController(
title: "No Camera",
message: "Sorry, this device has no camera",
preferredStyle: .alert)
let okAction = UIAlertAction(
title: "OK",
style:.default,
handler: nil)
alertVC.addAction(okAction)
present(
alertVC,
animated: true,
completion: nil)
}
// MARK: Photos Albums
func showImagePicker() {
picker.allowsEditing = false
picker.sourceType = .photoLibrary
//picker.modalPresentationStyle = .Popover
present(picker,
animated: true,
completion: nil)
picker.popoverPresentationController?.sourceView = self.view
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
image = chosenImage
self.performSegue(withIdentifier: "ShowEditView", sender: self)
dismiss(animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: false, completion: nil)
}
// MARK: Seque to EditViewController
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "ShowEditView" {
if let vc = segue.destination as? EditViewController {
vc.image = image
//vc.image = images[0]
}
}
}
Ignore the two commented out lines - those are mine for testing things. This code works on all devices, iOS 9+, all orientations (but remember that iPhone is always displayed portrait), and I've never had any problems in either the simulator (it has no camera) nor a physical device.
Of interest is one thing that could cause an issue (not sure if it's throwing SIGABRT) - I'm checking for a rear camera and throwing up an alert if it doesn't exist. (No check for front camera though. I'm not even sure if anything but an iPod touch doesn't have a front facing camera.)
Also, don't forget to add two things to your info.plist for iOS 10:
<key>NSCameraUsageDescription</key>
<string>Used to capture new image for photo effect</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>Used to select an image for photo effect</string>
You may put whatever you want in the description tags. Without these, the app will shut down in iOS 10 and Apple will reject your submission. Here's a link to more details.