iOS Charting Documentation - SciChart iOS Charts SDK v3.x SciChart > ISCIEventDispatcher Protocol ISCIEventDispatcher @protocol ISCIEventDispatcher <NSObject> Defines the interface with event callbacks. -onEvent: Called when need to handle events. Declaration Objective-C - (BOOL)onEvent:(id<ISCIEvent>)event; Swift func onEvent(_ event: ISCIEvent!) -> Bool Parameters event Event to handle. Return Value YES if the event was handled, otherwise - NO. © 2020 SciChart. All rights reserved. (Last updated: 2020-02-07) Generated by jazzy ♪♫ v0.12.0, a Realm project.