How to upload UIImage from iOS to Azure storage - objective-c

Question

I try to upload an image to Azure storage through MVC 4 web API. But the server side always return:
"Invalid length for a Base-64 char array or string."
Below is Objective-C code:
- (IBAction)btnUploadReceipt:(id)sender {
UIImage *img = self.imgReceipt.image;
NSData *dataObj = UIImagePNGRepresentation(img);
NSString *fff = [dataObj base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
//NSString *ddd = [self base64EncodeString:imgData];
//NSString *ddd = [dataObj base64EncodedString];
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:#"%#/api/upload/UploadAzure",baseUrl]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"Post"];
NSString *jsonData = [NSString stringWithFormat:#"FileName=%#&FileData=%#&FolderName=%#&UserName=%#&Point=%#&DateTime=%#&MerchantName=%#&OutletID=%#",fileName,fff,imgFolder,userName,#"3",dateTime,_mName,_mOutletID];
[request setHTTPBody:[jsonData dataUsingEncoding:NSUTF8StringEncoding]];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response,
NSData *data, NSError *connectionError)
{
if (data.length > 0 && connectionError == nil)
{
NSString * json =[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"%#",json);
if ([json isEqualToString:#"\"True\""]) {
NSLog(#"%#",#"Success Add Photo");
//[self dismissViewControllerAnimated:YES completion:nil];
//[[self navigationController]popViewControllerAnimated:YES];
}
else
{
UIAlertView *messageAlert = [[UIAlertView alloc]initWithTitle:#"Connection Error" message:#"Please Check Internet Setting" delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[messageAlert show];
}
}
else
{
UIAlertView *messageAlert = [[UIAlertView alloc]initWithTitle:#"Connection Error" message:#"Please Check Internet Setting" delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[messageAlert show];
}
}];
}
- (NSString *)base64String2 {
UIImage *img = self.imgReceipt.image;
NSData * data = [UIImagePNGRepresentation(img) base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength];
return [NSString stringWithUTF8String:[data bytes]];
}
Anyone face this kind of problem?

Answer 1

Have you tried using the Azure Storage iOS Library? The Getting Started documentation should be able to help with your scenario.