Amazon S3 iOS SDK v2上传到AWSAccessKeyId:Signature

I'm trying to upload file on S3 bucket and device is getting access information from another server (AWSAccessKeyId and Signature). Is it possible to upload file with AWS iOS SDK v2? If not are there any chances to use another approach possible for iOS (eg. generate Pre-Signed URL and do the http post/put)?I'm trying to upload file on S3 bucket and devi