AFNetworking Upload multiple files in sequence - ios

Question

I want to upload files sequentially. To be uploaded to the server one, then the second and so on.
When I run the following code, all the files seem to be loaded at once. In addition, I can not track the progress in MBHudProgress.
Can I somehow make it so that I get a response from the file loader that the previous file is loaded and can I load the next one?
for (id item in imagesArray) {
NSLog(#"item %#", item);
NSData *imageData = UIImagePNGRepresentation(item);
NSString *urlUpload = #"https://domain/api/wp-json/wp/v2/media?access_token=";
urlUpload = [urlUpload stringByAppendingString:[Lockbox unarchiveObjectForKey:#"access_token"]];
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
hud.mode = MBProgressHUDModeAnnularDeterminate;
hud.label.text = #"Uploaded photo";
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:#"POST" URLString:urlUpload parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData name:#"file" fileName:#"filename.png" mimeType:#"image/png"];
} error:nil];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
uploadTaskWithStreamedRequest:request
progress:^(NSProgress * _Nonnull uploadProgress) {
dispatch_async(dispatch_get_main_queue(), ^{
hud.progress = uploadProgress.fractionCompleted;
});
}
completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
[hud hideAnimated:YES];
if (error) {
NSLog(#"Error: %#", error);
} else {
NSLog(#"%# %#", response, responseObject);
if ([responseObject objectForKey:#"id"] == nil ||
[[responseObject objectForKey:#"id"] isEqual:[NSNull null]] ||
[responseObject objectForKey:#"id"] == [NSNull null]) {
NSLog(#"NO ID %#", responseObject);
} else {
NSLog(#"ID: %#", [responseObject objectForKey:#"id"]);
NSLog(#"source_url: %#", [responseObject objectForKey:#"source_url"]);
}
}
}];
[uploadTask resume];
}

Answer 1

As I understand, you want to upload image one by one. After first image is uploaded, start upload next image.
In my opinion, you can use recursive in this case. Take a look at my code below.
// Use recursive to upload an array items
- (void)startUploadItems:(NSMutableArray*)items {
if (items.count < 1) {
return;
}
[self startUploadItem:items[0] completion:^(BOOL success) {
[items removeObjectAtIndex:0];
[self startUploadItems:items];
}];
}
// Use to upload a single item.
- (void)startUploadItem:(id)item completion:(void(^)(BOOL success))completion {
NSLog(#"item %#", item);
NSData *imageData = UIImagePNGRepresentation(item);
NSString *urlUpload = #"https://domain/api/wp-json/wp/v2/media?access_token=";
urlUpload = [urlUpload stringByAppendingString:[Lockbox unarchiveObjectForKey:#"access_token"]];
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
hud.mode = MBProgressHUDModeAnnularDeterminate;
hud.label.text = #"Uploaded photo";
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:#"POST" URLString:urlUpload parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:imageData name:#"file" fileName:#"filename.png" mimeType:#"image/png"];
} error:nil];
AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
NSURLSessionUploadTask *uploadTask;
uploadTask = [manager
uploadTaskWithStreamedRequest:request
progress:^(NSProgress * _Nonnull uploadProgress) {
dispatch_async(dispatch_get_main_queue(), ^{
hud.progress = uploadProgress.fractionCompleted;
});
}
completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
[hud hideAnimated:YES];
if (error) {
NSLog(#"Error: %#", error);
} else {
NSLog(#"%# %#", response, responseObject);
if ([responseObject objectForKey:#"id"] == nil ||
[[responseObject objectForKey:#"id"] isEqual:[NSNull null]] ||
[responseObject objectForKey:#"id"] == [NSNull null]) {
NSLog(#"NO ID %#", responseObject);
} else {
NSLog(#"ID: %#", [responseObject objectForKey:#"id"]);
NSLog(#"source_url: %#", [responseObject objectForKey:#"source_url"]);
}
}
if (completion) {
completion(!error);
}
}];
[uploadTask resume];
}
Usage:
[self startUploadItems:imagesArray];