updateEndLevel method Null safety

Future<bool> updateEndLevel(
  1. int endLevel
)

更新最大显示层级,

iOS独有

Implementation

Future<bool> updateEndLevel(int endLevel) async {
  if (!Platform.isIOS) {
    return false;
  }
  if (endLevel > 21) {
    return false;
  }
  bool ret = await BMFMapDispatcherFactory.instance.overlayDispatcher
      .updateTextMember(this.methodChannel,
          {'id': this.id, 'member': 'endLevel', 'value': endLevel});
  if (ret) {
    this.endLevel = endLevel;
  }
  return ret;
}