Lacking an example of resumable item upload about onedrive-sdk-ios

[aclev]

Hi @vinceplusplus The SDK does not currently support resumable item upload directly however you can still use the SDK to create a resumable session and upload fragments to that session.

To do this you will first need to call

ODChunkedUploadSessionDescriptor *sessionDescriptor = [[ODChunkedUploadSessionDescriptor alloc] init];
sessionDescriptor.name = self.currentItem.name;
ODCreateItemSessionRequest *request = [[[[self.client drive] items:self.currentItem.id] createSessionWithItem:sessionDescriptor] request] 
[request executeWithCompletion:^(ODUploadSession *response, NSError *error){
    NSURL *fileURL = [NSURL URLWithString:@"path/to/file"];
    // You must write getNextRange yourself, note that according to the documentation
    // This should be somewhere between 5-10 MiB and if possible a multiple of 320 KiB
    NSRange startRange = [self getNextRange:fileURL start:0];
   //You must write sendFragment yourself
    [self sendFragment:[NSURL URLWithString:response.uploadUrl] withFile:[NSURL URLWithString:@"path/to/fil"] range:startRange];
}];

Send fragment would look something like:

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:uploadUrl];
 [self.client.authProvider appendAuthHeaders:request completion:^(NSMutableURLRequest *requestToSend, NSError *error){
     if (requestToSend){
        NSData *fragment = [self getFragmentFromFile:fileURL withRange:byteRange];
        [self appendContentHeaders:requestToSend withFile:fileURL range:byteRange];
        [[self.client.httpProvider  uploadTaskWithRequest:requestToSend fromData:fragment progress:nil completionHandler:^(NSData *data, NSURLResponse *response, NSError *error){
              if (((NSHTTPURLResponse*)response).statusCode == 202){
                    NSRange nextRange = [self getNextRange:fileURL fromResponse:response :data];
                    [self sendFragment:uploadUrl withFile:fileURL range:nextRange];
                }
        }] resume];
    }
}];

Make sure to take a look at the resumable upload documentation For specifics about fragment size and some other notes. Supporting fragment upload fully in the SDK is on our radar, and hopefully we will implement it in the future.