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How to upload images in background in iOS?

How to upload more then 200 images in background by AFNetworking in IOS

  • I am trying to upload more then 200 images (as per my need) When application in background. I am using NSUrlSession (upload task). It is uploading approx. 20 images easily but after that process is not responding. I am using a single request (Not using an array for upload images on server for client requirement). Please suggest me any idea with some example code, Because i have tried with approx. 10-15 different approach. Thanks is advance

  • Answer:

    Application goes to suspended state (In Background) after a specific time . So all the ongoing tasks remain suspended. Possible approach is , Application can request OS for some extra time to complete the unfinished task using beginBackgroundTaskWithExpirationHandler. A sample code is below: __block UIBackgroundTaskIdentifier backgroundTaskIdentifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{ NSLog(@"Background Time:%f",[[UIApplication sharedApplication] backgroundTimeRemaining]); [[UIApplication sharedApplication] endBackgroundTask:backgroundTaskIdentifier]; backgroundTaskIdentifier = backgroundTaskIdentifier; }]; NOTE: For 200 images as you are mentioning, it will be a tough task for the application to be in active state. Try different approach, for example giving support to App for Background modes.

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Try this I am using the AFNetworking for doing this Step 1: create your request NSMutableURLRequest *request1 = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:[NSString stringWithFormat:@"%@%@", API_MAIN_URL, IMAGE_UPLOAD] parameters:param constructingBodyWithBlock:^(id formData) { [formData appendPartWithFileURL:[NSURL fileURLWithPath:strImagePath] name:@"sendimage" fileName:[strImagePath lastPathComponent] mimeType:@"image/png" error:nil]; } error:nil]; Step 2: here I am creating the Stream at given Location [[AFHTTPRequestSerializer serializer] requestWithMultipartFormRequest:request1 writingStreamContentsToFile:[NSURL fileURLWithPath:[strImagePath stringByDeletingPathExtension]] completionHandler:^(NSError *error){ Step 3: here I am creating uploading task. ///here is file NSProgress *progress = nil; NSURLSessionUploadTask *uploadTask = [self.manager uploadTaskWithRequest:request1 fromFile:[NSURL fileURLWithPath:strImagePath] progress:&progress completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) { NSLog(@"response : %@\n\n responseObject : %@\n\n error : %@", response, responseObject, error); }]; [uploadTask resume]; } }]; } repest this code for uploading with background task

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