gallery duplicates image

[nursedayuksel]

for example, i'm selecting three images, then i click next. when i go back the images i've pre-selected are still selected, so that's good. however when i click next again the three images get appended to my images array twice, so i end up having two of the same images. same if i go back and click next again, i'll have three of the same images. am i supposed to do something additional? i'm using an if to check if the array contains the same image, but i don't think that's doing anything, so maybe i'm checking the wrong thing?

  `picker.didFinishPicking { [unowned picker] items, cancelled in
        for item in items {
            switch item {
            case .photo(let photo):
                if !selectedImages.contains(photo.image) {
                    selectedImages.append(photo.image)
                }
            case .video(let video):
                if !videoURLs.contains(video.url) {
                    videoURLs.append(video.url)
                }
                print(video.url)
            }
            
            self.preselectedItems.append(item)
        }
        createPostViewModel.showPostPage = true
        
        if cancelled {
            picker.dismiss(animated: true, completion: nil)
            createPostViewModel.showPostPage = false
        }
    }
    return picker`