Image Picker Controller

ImagePicker.swift

import UIKit

protocol ImagePickerDelegate {
    func imagePicked(image: UIImage)
}

class ImagePicker: NSObject {
    
    let presentingVC: UIViewController
    var delegate: ImagePickerDelegate?
    var resizeImageSize: CGFloat?
    
    init(presentingVC: UIViewController,delegate: ImagePickerDelegate) {
        self.presentingVC = presentingVC
        self.delegate = delegate
    }
    
    func present(allowEditing: Bool, resizeImageSize: CGFloat?){
        self.openActionSheet(allowEditing: allowEditing)
        self.resizeImageSize = resizeImageSize
    }
    
}

//MARK:
extension ImagePicker{
    func openActionSheet(allowEditing : Bool){
        
        let actionSheetController: UIAlertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
        
        //Create and add the Cancel action
        let cancelAction: UIAlertAction = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in
            //Just dismiss the action sheet
        }
        actionSheetController.addAction(cancelAction)
        //Create and add first option action
        if UIImagePickerController.isSourceTypeAvailable(.camera){
            let takePictureAction: UIAlertAction = UIAlertAction(title: "Take photo", style: .default)
            { action -> Void in
                
                let imagePicker = UIImagePickerController()
                imagePicker.delegate = self
                imagePicker.allowsEditing = allowEditing
                imagePicker.sourceType = .camera
                
                self.presentingVC.presentFullScreen(vc: imagePicker)
                
            }
            actionSheetController.addAction(takePictureAction)
        }
        //Create and add a second option action
        let choosePictureAction: UIAlertAction = UIAlertAction(title: "Photo library", style: .default)
        { action -> Void in
            
            let imagePicker = UIImagePickerController()
            imagePicker.delegate = self
            imagePicker.allowsEditing = allowEditing
            imagePicker.sourceType = .photoLibrary
            
            self.presentingVC.presentFullScreen(vc: imagePicker)
        }
        actionSheetController.addAction(choosePictureAction)
        
        //We need to provide a popover sourceView when using it on iPad
        actionSheetController.popoverPresentationController?.sourceView = self.presentingVC.view
        
        if (UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad)
        {
            actionSheetController.popoverPresentationController?.sourceRect = CGRect(x: self.presentingVC.view.bounds.midX, y: self.presentingVC.view.bounds.midY, width: 0, height: 0)
            actionSheetController.popoverPresentationController?.permittedArrowDirections = []
        }
        else
        {
            // Iphone
        }
        
        self.presentingVC.present(actionSheetController, animated: true, completion: nil)
        
    }
}


extension ImagePicker: UIImagePickerControllerDelegate,UINavigationControllerDelegate{
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        
        let info = (picker.allowsEditing) ?
            info[UIImagePickerController.InfoKey.editedImage] :
            info[UIImagePickerController.InfoKey.originalImage]
        
        if picker.allowsEditing{
            
            if let pickedImg = info as? UIImage {
                
                var resizedImage = UIImage()
                
                if resizeImageSize != nil{
                    if pickedImg.size.width * pickedImg.scale > CGFloat(500){
                        resizedImage = pickedImg.resizeImage(newWidth: CGFloat(500))!
                    }
                    else{
                        resizedImage = pickedImg
                    }
                }
                else{
                    resizedImage = pickedImg
                }
                
                let delay = 0.2
                DispatchQueue.main.asyncAfter(deadline: .now() + delay) {
                    // Code you want to be delayed
                    self.delegate?.imagePicked(image: resizedImage)
                }
            }
        }
        self.presentingVC.dismiss(animated: true, completion: nil)
        
    }
    
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController){
        
        self.presentingVC.dismiss(animated: true, completion: nil)
        
    }
    
}