Loading in a Loop

[Godefroy]

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

[Godefroy]

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?

[Godefroy]

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)
}