Loading in a Loop

[godefroydlb]

I am using URL Image to download several images (6images of 3Mb approx) in Loop. Only the last image is downloading correctly. I think it is due to the queue management. The fetchImage method launch initial and in progress steps but no success. What is the good way to manage it in a loop ?

`let iCloudDocumentsURL = FileManager.default.url(forUbiquityContainerIdentifier: nil)?.appendingPathComponent("Documents") .appendingPathComponent("PhotosVehicules") .appendingPathComponent(vehicule.immat) .appendingPathComponent(pointage) do { print(iCloudDocumentsURL?.standardizedFileURL.absoluteString) let items = try FileManager.default.contentsOfDirectory(atPath: iCloudDocumentsURL!.path) for item in items{ let photoStringURL = iCloudDocumentsURL! .appendingPathComponent(item) if(FileManager.default.fileExists(atPath: photoStringURL.path)) { print("File exist") fetchImageToken = URLImageService.shared.fetchImage(photoStringURL) { result in switch result { case .success(let imageInfo): self.pictures.append(UIImage(cgImage: imageInfo.cgImage)) print("I have loaded picture : " + String(self.pictures.count) + photoStringURL.lastPathComponent) break case .failure(let error): print("error") break } } } } } catch { print("catch") }

extension URLImageService { func fetchImage( url: URL, options: URLImageOptions? = nil, completion: @escaping ( result: Result<ImageInfo, Error>) -> Void) -> Any { let remoteImage = makeRemoteImage(url: url, options: options) let cancellable = remoteImage.$loadingState.sink { loadingState in switch loadingState { case .initial: print("initial" + url.path) break case .inProgress: print("progress" + url.path) break case .success(let transientImage): print("success" + url.path) completion(.success(transientImage.info)) case .failure(let error): completion(.failure(error)) } } remoteImage.load() return (remoteImage, cancellable) } }`

[dmytro-anokhin]

Hey, maybe new API can help: https://github.com/dmytro-anokhin/url-image#fetching-an-image

[godefroydlb]

Hi Dmytro,

It is me again :-p. Sorry to bother you again, but would it be possible to have an helper as the last fetch method ?

Thank you for your work :-)

[dmytro-anokhin]

Hey, not sure if I fully understand, what exactly do you want the last fetch method to do?

[godefroydlb]

Could you provide the same kind of example as you did for the fetch outside a view, but with this version with array and combine.

starting from an array of url and getting as result an array of images (cgimage)

[dmytro-anokhin]

Hey, there already is an example of loading multiple images in the documentation. For your case I would suggest to use map operator on the items array to convert it into an array of RemoteImagePublisher:

let publishers = items.map { item in
    let photoStringURL = iCloudDocumentsURL!.appendingPathComponent(item)
    return URLImageService.shared.remoteImagePublisher(photoStringURL)
}