NVImagePickerCropController Reusable Class for IOS Swift, To use this class pod 'CropViewController' is required

NVImagePickerCropController.swift

import UIKit
import CropViewController

// pod 'CropViewController'. (required)

protocol NVImagePickerCropControllerDelegate: class {
    func didSelect(image: UIImage)
}

class NVImagePickerCropController: NSObject {
    static let shared = NVImagePickerCropController()
    
    private var delegate: NVImagePickerCropControllerDelegate?
    private var photoAspectRatio: CGSize?
    
    private struct alertPicker {
        static var title = "Title"
        static var message = "Please Select an Option"
        static var camera = "Camera"
        static var photo = "Photo Library"
        static var cancel = "Cancel"
    }
    
    
    
    
    func pickerActionSheet(photoAspectRatio:CGSize? = nil,
                           delegate: NVImagePickerCropControllerDelegate) {
        
        self.photoAspectRatio = photoAspectRatio
        self.delegate = delegate
        
        let alert = UIAlertController(title: alertPicker.message, message: nil, preferredStyle: .actionSheet)
        
        alert.addAction(UIAlertAction(title: alertPicker.photo, style: .default , handler:{ (UIAlertAction)in
            let vc = UIImagePickerController()
            vc.sourceType = .photoLibrary
            vc.delegate = self
            vc.modalPresentationStyle = .fullScreen
            let controller = UIApplication.shared.keyWindow?.rootViewController
            controller?.present(vc, animated: true)
        }))
        
        
        alert.addAction(UIAlertAction(title: alertPicker.camera , style: .default , handler:{ (UIAlertAction)in
            
            let vc = UIImagePickerController()
            vc.sourceType = .camera
           
            vc.delegate = self
            let controller = UIApplication.shared.keyWindow?.rootViewController
            controller?.present(vc, animated: true)
            
        }))
        
        alert.addAction(UIAlertAction(title: alertPicker.cancel , style: .cancel , handler:{ (UIAlertAction)in
            
            print("Cancel")
            
        }))
        
        let controller = UIApplication.shared.keyWindow?.rootViewController
        controller?.present(alert, animated: true)
    }
    
    
}







extension NVImagePickerCropController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    internal func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        //        picker.dismiss(animated: true)
        
        if let image = info[.originalImage] as? UIImage  {
            
            print(image.size)
            if photoAspectRatio == nil {
                delegate?.didSelect(image: image)
                // print out the image size as a test
                
                picker.dismiss(animated: true)
                //                return
            }
            else{
                cropImage(image: image, picker)
                //                return
            }
            
            
        }
        
        //        else if let image = info[.originalImage] as? UIImage  {
        //            imagePickerDelegate?.mySelectedImage(image: image)
        //            // print out the image size as a test
        //            print(image.size)
        //            picker.dismiss(animated: true)
        //            return
        //        }
        //        else{
        picker.dismiss(animated: true, completion: nil)
        //        }
        
       
        
    }
    
    
    func cropImage(image : UIImage,_ picker: UIImagePickerController){
        let cropController = CropViewController(croppingStyle: CropViewCroppingStyle.default, image: image) as CropViewController
        //cropController.modalPresentationStyle = .fullScreen
        cropController.delegate = self
        
        
        // Uncomment this if you wish to provide extra instructions via a title label
        //cropController.title = "Crop Image"
        
        // -- Uncomment these if you want to test out restoring to a previous crop setting --
        //cropController.angle = 90 // The initial angle in which the image will be rotated
        //cropController.imageCropFrame = CGRect(x: 0, y: 0, width: 2848, height: 4288) //The initial frame that the crop controller will have visible.
        
        // -- Uncomment the following lines of code to test out the aspect ratio features --
        cropController.aspectRatioPreset = .presetCustom; //Set the initial aspect ratio as a square
        cropController.customAspectRatio = photoAspectRatio!//CGSize(width: photo, height: 100)
        cropController.aspectRatioLockEnabled = true // The crop box is locked to the aspect ratio and can't be resized away from it
        //cropController.resetAspectRatioEnabled = false // When tapping 'reset', the aspect ratio will NOT be reset back to default
        cropController.aspectRatioPickerButtonHidden = true
        
        // -- Uncomment this line of code to place the toolbar at the top of the view controller --
        //cropController.toolbarPosition = .top
        
        cropController.rotateButtonsHidden = true
        cropController.rotateClockwiseButtonHidden = true
        
        cropController.resetButtonHidden = true
        //        cropController.aspectRatioPreset
        //cropController.doneButtonTitle = "Title"
        //cropController.cancelButtonTitle = "Title"
        
        //                self.image = image
        
        //If profile picture, push onto the same navigation stack
        //                if croppingStyle == .circular {
        //                    if picker.sourceType == .camera {
        //                        picker.dismiss(animated: true, completion: {
        //                            self.present(cropController, animated: true, completion: nil)
        //                        })
        //                    } else {
        //                        picker.pushViewController(cropController, animated: true)
        //                    }
        //                }
        //                else
        //                { //otherwise dismiss, and then present from the main controller
        //        let parent = picker.parent
        picker.dismiss(animated: true, completion: {
            
            let window = UIApplication.shared.keyWindow
            cropController.modalPresentationStyle = .fullScreen
            window?.rootViewController?.present(cropController, animated: true, completion: nil)
            //                        parent?.present(cropController, animated: true, completion: nil)
            //self.navigationController!.pushViewController(cropController, animated: true)
        })
        //                }
    }
    
    
    
}

extension NVImagePickerCropController : CropViewControllerDelegate{
    public func cropViewController(_ cropViewController: CropViewController, didCropToImage image: UIImage, withRect cropRect: CGRect, angle: Int) {
        //        self.croppedRect = cropRect
        //        self.croppedAngle = angle
        
        delegate?.didSelect(image: image)
        cropViewController.dismiss(animated: true, completion: nil)
      
    }
}

//Usaga example

import UIKit
class ViewController: UIViewController {

@IBOutlet weak var imageView: UIImageView!

override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.

}

@IBAction func buttonTapped (sender: UIButton) {
    let picker = NVImagePickerCropController.shared
    picker.pickerActionSheet(photoAspectRatio: CGSize(width: 200, height: 200), delegate: self)
    
}

}

extension ViewController: NVImagePickerCropControllerDelegate {
func didSelect(image: UIImage) { self.imageView.image = image }

}