How to send high quality images to another view using collectionview - swift

Question

My question is really simple. I have a collectionView and I'm sending image from it to another view and showing it. But the problem is that the quality is really bad. I made collectionView from photolibrary using tutorial from youtube. Here's my code how I'm sending image.
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let selectedCell = collectionView.cellForItem(at: indexPath) as! CollectionViewCell
ujaj = selectedCell.imageView.image
performSegue(withIdentifier: "segue077", sender: self)
}
And my full code:
import UIKit
import Photos
class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
#IBOutlet public var bandau: UIImageView!
var imageArray = [UIImage]()
override func viewDidLoad() {
grabPhotos()
}
func grabPhotos(){
let imgManager = PHImageManager.default()
let requestOptions = PHImageRequestOptions()
requestOptions.isSynchronous = true
requestOptions.deliveryMode = .highQualityFormat // Quality of images
let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
if let fetchResult : PHFetchResult = PHAsset.fetchAssets(with: .image, options: fetchOptions) {
if fetchResult.count > 0 {
for i in 0..<fetchResult.count {
imgManager.requestImage(for: fetchResult.object(at: i) as! PHAsset, targetSize: CGSize(width: 200, height: 200), contentMode: .aspectFill, options: requestOptions, resultHandler: {
image, error in
self.imageArray.append(image!)
})
}
}
else {
print("You got no photos")
//self.collectionView?.reloadData()
}
}
}
#IBOutlet weak var fakk: UIImageView!
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return imageArray.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! CollectionViewCell
let imageView = cell.viewWithTag(1) as! UIImageView
imageView.image = imageArray[indexPath.row]
return cell
}
public var ujaj: UIImage?
#IBAction func kadsasd(_ sender: Any) {
performSegue(withIdentifier: "segue077", sender: self)
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let selectedCell = collectionView.cellForItem(at: indexPath) as! CollectionViewCell
ujaj = selectedCell.imageView.image
performSegue(withIdentifier: "segue077", sender: self)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.width / 3 - 1
return CGSize(width: width, height: width)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 1.0
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let main = segue.destination as! display
main.image = ujaj
}
Question is how to send FULL quality images? Because now I have 200x200 photos. If I change to higher then automatically my application crashes because of the memory. Maybe it's possible to get a full quality image when user clicks on the cell?

Answer 1

As long as you have your indexPath I suggest you to convert it to Integer and then ask for a photo from library once again. Don't forget to change .targetSize to PHImageManagerMaximumSize also .contentMode to PHImageContentMode.default
In your case:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let index : Int = indexPath.row
let imgManager = PHImageManager.default()
let requestOptions = PHImageRequestOptions()
requestOptions.isSynchronous = true
requestOptions.deliveryMode = .highQualityFormat // Quality of images
let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
let fetchResult : PHFetchResult = PHAsset.fetchAssets(with: .image, options: fetchOptions)
imgManager.requestImage(for: fetchResult.object(at: index) , targetSize: PHImageManagerMaximumSize, contentMode: PHImageContentMode.default, options: requestOptions, resultHandler: {
image, error in
self.ujaj = image
})
performSegue(withIdentifier: "segue077", sender: self)
}