We call addObserverForName in C++ inside the IrisEvent.registerEventHandler in iOS/macOS, at this time, the IrisEvent.registerEventHandler is called after the createNativeApiEngine, if an addObserverForName is called inside the createNativeApiEngine, which may block our observer. To ensure our observer always calls first, so move IrisEvent.registerEventHandler above the _nativeIrisApiEngineBinding.initialize().
We call
addObserverForNamein C++ inside theIrisEvent.registerEventHandlerin iOS/macOS, at this time, theIrisEvent.registerEventHandleris called after thecreateNativeApiEngine, if anaddObserverForNameis called inside thecreateNativeApiEngine, which may block our observer. To ensure our observer always calls first, so moveIrisEvent.registerEventHandlerabove the_nativeIrisApiEngineBinding.initialize().