How to allow the user to pick a photo from his camera roll or photo library?

Question

I\'m making a little photo editing app for fun. Users must select a photo from their camera roll which will then be imported for modification.

How does this generall

Answer 1

@WilliamT 's answer worked really well for me. Here is his, but updated for Swift 4 in case anyone is still looking for this.

This goes into the view controller class block that contains the button that you want to trigger the camera/image picker.

@IBAction func YourButtonToTriggerCamera/ImagePicker(_ sender: UIButton) {
    let picker = UIImagePickerController()
    picker.delegate = (self as UIImagePickerControllerDelegate & UINavigationControllerDelegate)
    let alert = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
    alert.addAction(UIAlertAction(title: "Camera", style: .default, handler: {
        action in
        picker.sourceType = .camera
        self.present(picker, animated: true, completion: nil)
    }))
    alert.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: {
        action in
        picker.sourceType = .photoLibrary
        self.present(picker, animated: true, completion: nil)
    }))
    alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
    self.present(alert, animated: true, completion: nil)
}

This goes below your View Controller Class:

extension YourViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
        //use image here!
        dismiss(animated: true, completion: nil)
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        dismiss(animated: true, completion: nil)
    }
}