Start an upload of an image when the app is in foreground and continue the upload when the app is sent to the background or is closed?

I use this code to upload an image in objective c.

-(void)uploadImageInBackground:(UIImage*)image toPreSignedURL:(NSURL*)preSignedURL withCompletion:(void (^)(id _Nullable response))completion{
    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:preSignedURL];
    request.HTTPMethod = @"PUT";
    [request setValue:@"image/jpeg" forHTTPHeaderField:@"Content-Type"];
    NSString* filePath = [self getFilePathForFileName:@"image.jpeg" image:image];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:filePath]){

    NSURLSessionUploadTask *uploadTask = [manager uploadTaskWithRequest:request fromData:[NSData dataWithContentsOfFile:filePath] progress:^(NSProgress * _Nonnull uploadProgress) {
        NSLog(@"\nUpload Progress: %f", uploadProgress.fractionCompleted);

        } completionHandler:^(NSURLResponse * _Nonnull response, id  _Nullable responseObject, NSError * _Nullable error) {
            NSFileManager *fileManager = [NSFileManager new];
            [fileManager removeItemAtPath:filePath error:NULL];
            if (error) {
                NSLog(@"\nhello: Upload Progress COMPLETED: %@", response);
    [uploadTask resume];

How to continue the upload when the app is sent to the background by the user or when the user closes the app?

Any help appreciated.

This topic was automatically closed after 166 days. New replies are no longer allowed.