OpenHarmony3.1release Emitter 无法在service中发送事件

buildDataChange() {
    console.log("buildDataChange");
    emitter.on({
      eventId: 1
    }, (eventData) => {
      console.log("change data callback:" + JSON.stringify(eventData));
      if (eventData) {
        this.sourceString = eventData.data.content;
      }
    })
  }
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    sendEvent(data) {
        console.log(`${TAG} sendEvent data: ${data}`);
        var eventData = {
            data: {
                "content": data,
                "id": 1,
            }};
        var innerEvent = {
            eventId: 1,
            priority: emitter.EventPriority.HIGH
        };
        emitter.emit(innerEvent, eventData);
        console.log(`${TAG} emitter.emit`);
    }
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