# parameter(_:channel:hasKeyframe:at:) Tells whether there is a keyframe at a given time. ``` func parameter(_ parameterID: Int, channel channelIndex: Int, hasKeyframe: UnsafeMutablePointer, at time: CMTime) -> (any Error)? ``` ## Parameters `parameterID` The ID of the parameter you wish to query. `channelIndex` The index of the channel of the parameter you wish to query. `hasKeyframe` Returns whether or not the channel of the parameter specified has a keyframe at the time specified. `time` The time at which you wish to know if there’s a keyframe. --- 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)