iOS save photo in an app specific album

Question

I\'m creating an iOS 5 app. I want to save a photo to the device.

I want to save the photo to an album specific to my app, so I need to create the album, and then sa

Answer 1

Adaptation of Eddy's answer for Swift 4:

    func saveImageToAlbum(_ image: UIImage, name: String) {

        if let collection = fetchAssetCollection(name) {
            self.saveImageToAssetCollection(image, collection: collection)
        } else {
            // Album does not exist, create it and attempt to save the image
            PHPhotoLibrary.shared().performChanges({
                PHAssetCollectionChangeRequest.creationRequestForAssetCollection(withTitle: name)
            }, completionHandler: { (success: Bool, error: Error?) in
                guard success == true && error == nil else {
                    NSLog("Could not create the album")
                    if let err = error {
                        NSLog("Error: \(err)")
                    }
                    return
                }

                if let newCollection = self.fetchAssetCollection(name) {
                    self.saveImageToAssetCollection(image, collection: newCollection)
                }
            })
        }
    }

    func fetchAssetCollection(_ name: String) -> PHAssetCollection? {

        let fetchOption = PHFetchOptions()
        fetchOption.predicate = NSPredicate(format: "title == '" + name + "'")

        let fetchResult = PHAssetCollection.fetchAssetCollections(
            with: PHAssetCollectionType.album,
            subtype: PHAssetCollectionSubtype.albumRegular,
            options: fetchOption)

        return fetchResult.firstObject
    }

    func saveImageToAssetCollection(_ image: UIImage, collection: PHAssetCollection) {

        PHPhotoLibrary.shared().performChanges({

            let creationRequest = PHAssetCreationRequest.creationRequestForAsset(from: image)
            if let request = PHAssetCollectionChangeRequest(for: collection),
                let placeHolder = creationRequest.placeholderForCreatedAsset {
                request.addAssets([placeHolder] as NSFastEnumeration)
            }
        }, completionHandler: { (success: Bool, error: Error?) in
            guard success == true && error == nil else {
                NSLog("Could not save the image")
                if let err = error {
                    NSLog("Error: " + err.localizedDescription)
                }
                return
            }
        })
    }