DeviceEventEmitter example in tutorial fails

[mpj]

There is an issue with the tutorial, with the sendAppEventWithName call.

From: https://facebook.github.io/react-native/docs/nativemodulesios.html

This example code will fail with this problem:

Text for search engine: "Requiring unknown module "RCTNativeAppEventEmitter". If you are sure the modules is there, try restarting the packager.

This is because this call...

react-native/React/Base/RCTEventDispatcher.m

Line 39 in 72d3d72

[_bridge enqueueJSCall:@"RCTNativeAppEventEmitter.emit"

Will eventually hit this line, where the error occurs, because there is no RCTNativeAppEventEmitter in the dependency tree. I guess this is because the JavaScript in the example is using the DeviceEventEmitter which is actually requiring the RCTDeviceEventEmitter, not the RCTAppEventEmitter which I cannot find anywhere in the JS code?

Changing the example Objective-C to call sendDeviceEventWithName instead of sendAppEventWithName fixes the problem.

[tptee]

👍 sendDeviceEventWithName works for me as well

[vitch]

Seems like #918 is a fix so you can still RCTAppEventEmitter but for now I'm also using the DeviceEventEmitter. It would be good to know what the purpose of the two separate emitters is meant to be...

[watsonwu9]

sendDeviceEventWithName works for me too. thanks

[brentvatne]

Fixed now!