# Global Variables ## Topics ### Constants [`var kFTSListingNameKey: Unmanaged!`](/documentation/IOBluetooth/kFTSListingNameKey) NSString value. This key is used with the array of NSDictionary’s returned through the delegate method fileTransferServicesGetListingComplete: after calling getFolderListing. [`var kFTSListingSizeKey: Unmanaged!`](/documentation/IOBluetooth/kFTSListingSizeKey) Int value. This key is used with the array of NSDictionary’s returned through the delegate method fileTransferServicesGetListingComplete: after calling getFolderListing. [`var kFTSListingTypeKey: Unmanaged!`](/documentation/IOBluetooth/kFTSListingTypeKey) FTSFileType value. This key is used with the array of NSDictionary’s returned through the delegate method fileTransferServicesGetListingComplete: after calling getFolderListing. [`var kFTSProgressBytesTotalKey: Unmanaged!`](/documentation/IOBluetooth/kFTSProgressBytesTotalKey) NSNumber integer value. This key is used with the NSDictionary returned from the fileTransferServicesPutProgress: and fileTransferServicesGetProgress: delegate methods [`var kFTSProgressBytesTransferredKey: Unmanaged!`](/documentation/IOBluetooth/kFTSProgressBytesTransferredKey) NSNumber integer value. This key is used with the NSDictionary returned from the fileTransferServicesPutProgress: and fileTransferServicesGetProgress: delegate methods [`var kFTSProgressEstimatedTimeKey: Unmanaged!`](/documentation/IOBluetooth/kFTSProgressEstimatedTimeKey) NSNumber double value. This key is used with the NSDictionary returned from the fileTransferServicesPutProgress: and fileTransferServicesGetProgress: delegate methods [`var kFTSProgressPercentageKey: Unmanaged!`](/documentation/IOBluetooth/kFTSProgressPercentageKey) NSNumber float value. This key is used with the NSDictionary returned from the fileTransferServicesPutProgress: and fileTransferServicesGetProgress: delegate methods [`var kFTSProgressTimeElapsedKey: Unmanaged!`](/documentation/IOBluetooth/kFTSProgressTimeElapsedKey) NSNumber int value. This key is used with the NSDictionary returned from the fileTransferServicesPutProgress: and fileTransferServicesGetProgress: delegate methods [`var kFTSProgressTransferRateKey: Unmanaged!`](/documentation/IOBluetooth/kFTSProgressTransferRateKey) NSNumber float value. This key is used with the NSDictionary returned from the fileTransferServicesPutProgress: and fileTransferServicesGetProgress: delegate methods --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)