annotationManager method
Get annotation manager object.
Returns
RtcAnnotationManager
object.
获取标注管理器对象。
Returns
RtcAnnotationManager
对象。
Implementation
@override
Future<RtcAnnotationManager?> annotationManager() async {
if (_annotationManager != null) return _annotationManager;
await _invokeMethod('annotationManager');
_annotationManager = RtcAnnotationManager();
return _annotationManager;
}