How can we know if image already exists in the album? - ios

Question

I have created an album programmatically. I want to check if image already exists in album before adding new image.
you can check with below code
CustomAlbum.shared.saveImage(image: UIImage())
save image like this.
import Foundation
import Photos
class CustomAlbum {
static let albumName = "xyz"
static let shared = CustomAlbum()
var assetCollection: PHAssetCollection!
init() {
func fetchAssetCollectionForAlbum() -> PHAssetCollection! {
let fetchOptions = PHFetchOptions()
fetchOptions.predicate = NSPredicate(format: "title = %#", CustomAlbum.albumName)
let collection = PHAssetCollection.fetchAssetCollections(with: .album, subtype: .any, options: fetchOptions)
if let _: AnyObject = collection.firstObject {
return collection.firstObject!
}
return nil
}
if let assetCollection = fetchAssetCollectionForAlbum() {
self.assetCollection = assetCollection
return
}
PHPhotoLibrary.shared().performChanges({
PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: CustomAlbum.albumName)
}) { _, _ in
self.assetCollection = fetchAssetCollectionForAlbum()
}
}
func saveImage(image: UIImage) {
if assetCollection == nil { return }
PHPhotoLibrary.shared().performChanges({
let assetPlaceholder = PHAssetChangeRequest.creationRequestForAsset(from: image).placeholderForCreatedAsset
let albumChangeRequest = PHAssetCollectionChangeRequest(for: self.assetCollection)
let assetEnumeration: NSArray = [assetPlaceholder!]
albumChangeRequest?.addAssets(assetEnumeration)
}, completionHandler: nil)
}
func allPhotos(albumName: String = "xyz", albumImages: #escaping ([UIImage]) -> Void) {
let group = DispatchGroup()
var images: [Image] = []
let fetchOptions = PHFetchOptions()
fetchOptions.predicate = NSPredicate(format: "title = %#", albumName)
let resultCollections = PHAssetCollection.fetchAssetCollections(
with: .album,
subtype: .albumRegular,
options: fetchOptions)
resultCollections.enumerateObjects({
(object, index, stop) -> Void in
let collection = object
let result = PHAsset.fetchAssets(in: collection, options: nil)
result.enumerateObjects({
(object, index, stop) -> Void in
group.enter()
images.append(object.getfullImage())
group.leave()
})
})
group.notify(queue: DispatchQueue.main) {
albumImages(images)
}
}
}
with this code i'm fetching all images of album and comparing against the image I want to save.
PHPhotoLibrary.shared().allPhotos { (images) in
let image = UIImage()
}

Answer 1

class func getPhotofolder() -> String{
let fileManager = FileManager.default
let paths = (NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString).appendingPathComponent("hsafetyPhoto") //hsafetyPhoto is my folder name to store the image and if doesnt exist then system will create one
if !fileManager.fileExists(atPath: paths){
try! fileManager.createDirectory(atPath: paths, withIntermediateDirectories: true, attributes: nil)
}else{
print("Already dictionary created.")
}
return paths
}
//Save Image At hsafetyPhoto Document Directory
class func saveImageDocumentDirectory(photo : UIImage, photoUrl : String) -> Bool{
let fileManager = FileManager.default
let paths = Utility.getPhotofolder().stringByAppendingPathComponent(pathComponent: photoUrl)
print("image's path \(paths)")
if !fileManager.fileExists(atPath: paths){
let imageData = UIImageJPEGRepresentation(photo, 0.5)
fileManager.createFile(atPath: paths as String, contents: imageData, attributes: nil)
if !fileManager.fileExists(atPath: paths){
return false
}else{
return true
}
}else{
print(paths)
let imageData = UIImageJPEGRepresentation(photo, 0.5)
fileManager.createFile(atPath: paths as String, contents: imageData, attributes: nil)
if !fileManager.fileExists(atPath: paths){
return false
}else{
return true
}
}
}