UIImage isn't showing up in UIScrollView - arrays

Question

Im grabbing the photos from library using a cocoa pod called BSImagePicker. The Images are then stored into a photoArray. I want to take those images from the array and present them in an image view that's held inside the scrollView. However the images aren't showing up at all.
This is what I've currently tried.
This is the code that the cocoa pod uses to store images into the array:
func openImagePicker() {
let vc = BSImagePickerViewController()
self.bs_presentImagePickerController(
vc,
animated: true,
select: { (assest: PHAsset) -> Void in },
deselect: { (assest: PHAsset) -> Void in },
cancel: { (assest: [PHAsset]) -> Void in },
finish: { (assest: [PHAsset]) -> Void in
for i in 0..<assest.count {
self.SelectedAssets.append(assest[i])
}
self.convertAssetToImages()
},
completion: nil
)
print(photoArray)
setupImages(photoArray)
}
this is the code that converts asset to image
extension addImages {
func convertAssetToImages() -> Void {
if SelectedAssets.count != 0{
for i in 0..<SelectedAssets.count{
let manager = PHImageManager.default()
let option = PHImageRequestOptions()
var thumbnail = UIImage()
option.isSynchronous = true
let width = scrollView.frame.width
let height = scrollView.frame.height
manager.requestImage(for: SelectedAssets[i], targetSize: CGSize(width: width, height: height), contentMode: .aspectFill, options: option, resultHandler: {(result,info) -> Void in
thumbnail = result!
})
let data = thumbnail.jpegData(compressionQuality: 1)
let newImage = UIImage(data: data! as Data)
self.photoArray.append(newImage! as UIImage)
}
}
}
}
this code takes image from photo array into scrollview
func setupImages(_ images: [UIImage]){
for a in 0..<photoArray.count {
let theImage = UIImageView()
theImage.image = self.photoArray[a]
let xPosition = UIScreen.main.bounds.width * CGFloat(a)
self.scrollView.frame = CGRect(x: xPosition, y: 0, width: self.scrollView.frame.width, height: self.scrollView.frame.height)
theImage.contentMode = .scaleAspectFit
self.scrollView.contentSize.width = self.scrollView.frame.width * CGFloat(a + 1)
self.scrollView.addSubview(theImage)
}
}
I have no idea why it isn't working.