Fixed flutter-webrtc#158.

cloudwebrtc · cloudwebrtc · commit ff5fcfce7851 · 2019-12-24T09:18:09.000+08:00
diff --git a/ios/Classes/FlutterRTCDataChannel.m b/ios/Classes/FlutterRTCDataChannel.m
@@ -77,7 +77,7 @@ -(void)createDataChannel:(nonnull NSString *)peerConnectionId
         dataChannel.delegate = self;
         
         FlutterEventChannel *eventChannel = [FlutterEventChannel
-                                             eventChannelWithName:[NSString stringWithFormat:@"FlutterWebRTC/dataChannelEvent%d", dataChannel.channelId]
+                                             eventChannelWithName:[NSString stringWithFormat:@"FlutterWebRTC/dataChannelEvent%d", [dataChannelId intValue]]
                                              binaryMessenger:messenger];
         
         dataChannel.eventChannel = eventChannel;
diff --git a/macos/Classes/FlutterRTCDataChannel.m b/macos/Classes/FlutterRTCDataChannel.m
@@ -77,7 +77,7 @@ -(void)createDataChannel:(nonnull NSString *)peerConnectionId
         dataChannel.delegate = self;
         
         FlutterEventChannel *eventChannel = [FlutterEventChannel
-                                             eventChannelWithName:[NSString stringWithFormat:@"FlutterWebRTC/dataChannelEvent%d", dataChannel.channelId]
+                                             eventChannelWithName:[NSString stringWithFormat:@"FlutterWebRTC/dataChannelEvent%d", [dataChannelId intValue]]
                                              binaryMessenger:messenger];
         
         dataChannel.eventChannel = eventChannel;
