getExternalAnnotation method

  1. @override
Future<RtcAnnotation?> getExternalAnnotation(
  1. String annotationId
)
override

get external annotation object.

Parameter annotationId Annotation ID. Max length is 128 bytes

Returns

  • non-null: a pointer to the external annotation object
  • others: Failure

Note

  • Annotation ID must start with "pano-annotation-ext-".
  • When call this interface with annotationId not set before, AnnotationManager will create new annotation internal.

获取外部标注对象

Parameter annotationId 标注ID。最大长度128字节

Returns

  • 非空指针： 指向外部标注对象的指针。
  • 空指针: 失败

Note

  • 标注ID必须以"pano-annotation-ext-"作为前缀。
  • 当传入的annotationId之前没被设置过，AnnotationManager会生成新的标注对象

Implementation

@override
Future<RtcAnnotation?> getExternalAnnotation(String annotationId) async {
  var annoId = await _invokeMethod(
      'getExternalAnnotation', {'annotationId': annotationId}) as String;
  if (annoId.isNotEmpty) {
    annotations[annoId] ??= RtcAnnotation(annoId);
    return annotations[annoId];
  }
  return null;
}