Agora RTC Objective-C API Reference Refactor

Data Fields
IMetadataObserver::Metadata Struct Reference

## Data Fields
const char * | channelId
unsigned int | uid
unsigned int | size
unsigned char * | buffer
long long | timeStampMs

## Detailed Description

Metadata.

## Constructor & Destructor Documentation

## ◆ Metadata()

Metadata | ( |  | ) |
| inline

## Field Documentation

## ◆ channelId

const char* channelId

The channel ID of the `metadata`.

## ◆ uid

unsigned int uid

The User ID that sent the metadata.

- For the receiver: The user ID of the user who sent the `metadata`.
- For the sender: Ignore this value.

## ◆ size

unsigned int size

The buffer size of the sent or received `metadata`.

## ◆ buffer

unsigned char* buffer

The buffer address of the sent or received `metadata`.

## ◆ timeStampMs

long long timeStampMs

The NTP timestamp (ms) when the metadata is sent.

Note
  If the receiver is audience, the receiver cannot get the NTP timestamp (ms).