Hi!

Swift newbie here and I've been having a problem for hours that's absolutely doing my head in. I have the code below, and I'm trying to store a UIImage in the Kinvey backend. I've followed instructions from other users who had a similar problem, but nothing's working for me. 

import Foundation

class Test:  NSObject {

    var userID: String?

    var entityId: String?

    var picture: UIImage?

    var metadata: KCSMetadata?

    internal override func hostToKinveyPropertyMapping() -> [NSObject : AnyObject]! {

        return [

            "entityId" : KCSEntityKeyId,

            "userID" : "userID",

            "picture":"picture",

            "metadata": KCSEntityKeyMetadata

        ]

    }

    internal class override func kinveyPropertyToCollectionMapping() -> [NSObject : AnyObject]! {

        return [

            "picture" :*not allowing me to select KCSFileStoreCollectionName*

        ]

    }

}

The problem is, I am trying to store the value 'KCSFileStoreCollectionName' in the dictionary returned by kinveyPropertyToCollectionMapping(), but 'KCSFileStoreCollectionName' is coming up as an 'unresolved identifier' in Xcode. I've had a look at the Kinvey KCSFileStore.h file, and I can clearly see 'KCSFileStoreCollectionName' has been declared as a global variable. 

@interface KCSCollection (KCSFileStore)

/** Constant to represent the File metadata collection */

FOUNDATION_EXPORT NSString* const KCSFileStoreCollectionName;

/** Helper method to access the file store metadata. Objects will be `KCSFile` type. */

+ (instancetype) fileMetadataCollection;

@end

However, for some reason Xcode isn't picking it up. I downloaded the Relational-Data example from here, and also tried to set the 'KCSFileStoreCollectionName' property, but still having the same issue. Please any help with this would be appreciated!