objective c - How to upload a UIImage to S3 with AWS iOS SDK v2

Question

The README page in Github (https://github.com/aws/aws-sdk-ios-v2) already has an example to upload an image, from the file path URL:

AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.bucket = yourBucket;
uploadRequest.key = yourKey;
uploadRequest.body = yourDataURL; // <<<< this is a NSURL
uploadRequest.contentLength = [NSNumber numberWithUnsignedLongLong:fileSize];

But, what if I only have a UIImage in memory (without file path)? Is it possible to upload a UIImage (or it's NSData) to S3 using the SDK?

Would it be easier to manually use the HTTP API (using something like AFNetworking)?

Answer 1

Even though AWSiOSSDKv2 doesn't support uploading images from memory, you can save it as a file and then upload it.

//image you want to upload
UIImage* imageToUpload = [UIImage imageNamed:@"imagetoupload"]; 

//convert uiimage to 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", dateKey]];
[UIImagePNGRepresentation(imageToUpload) writeToFile:filePath atomically:YES];

NSURL* fileUrl = [NSURL fileURLWithPath:filePath];

//upload the image
AWSS3TransferManagerUploadRequest *uploadRequest = [AWSS3TransferManagerUploadRequest new];
uploadRequest.body = fileUrl;
uploadRequest.bucket = AWS_BUCKET_NAME;
uploadRequest.key = @"yourkey";
uploadRequest.contentType = @"image/png";
[[transferManager upload:thumbNailUploadRequest] continueWithExecutor:[BFExecutor mainThreadExecutor] withBlock:^id(BFTask *task) {
    if(task.error == nil) {
        NSLog(@"woot");
    }
    return nil;
}];