How to Crop iPhone Image in Swift 3 App - ios

Question

I am currently in the process of creating a camera app, however when someone takes a picture and it goes to the the crop screen, it doesn't actually fit it to that specific size. How can I change my code to make it only spit out a 800x800 image?
import UIKit
import Firebase
class CameraControllerViewController: UIViewController,UIImagePickerControllerDelegate, UINavigationControllerDelegate {
#IBOutlet weak var postBtn: UIButton!
#IBOutlet weak var pickedimage: UIImageView!
#IBOutlet weak var libBtn: UIButton!
#IBOutlet weak var camBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
#IBAction func camerabuttonaction(_ sender: Any) {
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
imagePicker.allowsEditing = false
self.present(imagePicker, animated:true, completion: nil)
}
}
#IBAction func photolibraryaction(_ sender: Any) {
if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
imagePicker.allowsEditing = true
self.present(imagePicker, animated: true, completion: nil)
}
}
#IBAction func saveaction(_ sender: Any) {
let imageData = UIImageJPEGRepresentation(pickedimage.image!, 0.6)
let compressedJPEGImage = UIImage(data: imageData!)
UIImageWriteToSavedPhotosAlbum(compressedJPEGImage!, nil, nil, nil)
saveNotice()
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]! ) {
pickedimage.image = image
camBtn.isHidden = true
libBtn.isHidden = true
postBtn.isHidden = false
self.dismiss(animated: true, completion: nil);
}
func saveNotice() {
AppDelegate.instance().showActivityIndicator()
//let alertController = UIAlertController(title: "Image Saved", message: "Your picture was saved.", preferredStyle: .alert)
//let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
//alertController.addAction(defaultAction)
//present(alertController, animated: true, completion: nil)
let uid = Auth.auth().currentUser!.uid
let ref = Database.database().reference()
let storage = Storage.storage().reference(forURL: "gs://new-glaance.appspot.com")
let key = ref.child("posts").childByAutoId().key
let imageRef = storage.child("posts").child(uid).child("\(key).jpg")
let data = UIImageJPEGRepresentation(self.pickedimage.image!, 0.6)
let uploadTask = imageRef.putData(data!, metadata: nil) { (metadata,error) in
if error != nil {
print(error!.localizedDescription)
AppDelegate.instance().dismissActivityIndicator()
return
}
imageRef.downloadURL(completion: { (url, error) in
if let url = url {
let feed = ["userID": uid,
"pathToImage": url.absoluteString,
"likes":0,
"author": Auth.auth().currentUser!.displayName!,
"postID": key] as [String: Any]
let postFeed = ["\(key)":feed]
ref.child("posts").updateChildValues(postFeed)
AppDelegate.instance().dismissActivityIndicator()
}
})
}
uploadTask.resume()
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}

Answer 1

I don't know of a way to constrain a crop to a particular aspect ratio. Instead I'd suggest creating your own method for cropping images.
I have an app on Github called CropImg that does just that. It doesn't constrain the crop to square, but that would be easy to add.