Convert String into URL and show in Image (ios and objective c)

NSArray *bank_image=[arrayData

                                   valueForKey:@"foldername_"];

             NSString *bank_image_str=[bank_image firstObject];

             

             NSURL *url=[NSURL URLWithString:bank_image_str];

             

             NSData *imageData = [NSData dataWithContentsOfURL:url];

             

             _b_image_view.image=[UIImage imageWithData:imageData];