playStream method
播放流 Play Stream
morseCode Morse Code / 摩尔斯电码
onComplete 播放完成回调 / Playback complete callback
Implementation
@override
StreamSubscription<dynamic> playStream(String morseCode) {
_streamSubscription = null;
_streamSubscription = eventChannel
.receiveBroadcastStream(morseCode)
.listen(null, cancelOnError: true);
return _streamSubscription!;
}