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Chat

Send a Message

Basic Feature Description

The method for sending a message is in the core classes V2TIMManager and V2TIMMessageManager (Android) / V2TIMManager(Message) (iOS and macOS).
It supports sending text, custom, and rich media messages, and all of which belong to the V2TIMMessage type.
V2TIMMessage can contain V2TIMElem sub-types to indicate different types of messages.

API Description

The sendMessage API (Android / iOS and macOSWindows) is one of the core APIs for message sending. It supports sending messages of all types.
Note
The advanced message sending API mentioned below refers to sendMessage.
The API is as described below:
Android
iOS and macOS
Windows
API prototype:
// V2TIMMessageManager
public abstract String sendMessage(
V2TIMMessage message,
String receiver,
String groupID,
int priority,
boolean onlineUserOnly,
V2TIMOfflinePushInfo offlinePushInfo,
V2TIMSendCallback<V2TIMMessage> callback);
Parameter description:
Parameter
Definition
Valid for One-to-One Chat
Valid for Group Chat
Description
message
Message object
YES
YES
It needs to be created through the createXxxMessage API. Here, Xxx indicates the specific type.
receiver
userID of the one-to-one message receiver
YES
NO
Just specify receiver for sending one-to-one chat messages.
groupID
groupID of the group chat
NO
YES
Just specify groupID for sending group messages.
priority
Message priority
NO
YES
Set a higher priority for important messages (such as red packets and gifts) and a lower priority for frequent and unimportant messages (such as likes).
onlineUserOnly
Whether the message can be received by online users only
YES
YES
If it is set to true, the message cannot be pulled when a receiver pulls historical messages. This is often used to implement weak prompts, such as "The other party is typing..." and unimportant prompts in a group.
offlinePushInfo
Offline push message
YES
YES
The title and content carried when a message is pushed offline.
callback
Callback for message sending
YES
YES
Includes the callback for upload progress, callback for successful sending, and callback for failed sending.

Method prototype:
// V2TIMManager+Message.h
- (NSString *)sendMessage:(V2TIMMessage *)message
receiver:(NSString *)receiver
groupID:(NSString *)groupID
priority:(V2TIMMessagePriority)priority
onlineUserOnly:(BOOL)onlineUserOnly
offlinePushInfo:(V2TIMOfflinePushInfo *)offlinePushInfo
progress:(V2TIMProgress)progress
succ:(V2TIMSucc)succ
fail:(V2TIMFail)fail;
Parameter description:
Parameter
Definition
Valid for One-to-One Chat
Valid for Group Chat
Description
message
Message object
YES
YES
It needs to be created through the `createXxxMessage` API. Here, `Xxx` indicates the specific type.
receiver
`userID` of the one-to-one message receiver
YES
NO
Just specify `receiver` for sending one-to-one messages.
groupID
`groupID` of the group chat
NO
YES
Just specify `groupID` for sending group messages.
priority
Message priority
NO
YES
Set a higher priority for important messages (such as red packets and gifts) and a lower priority for frequent and unimportant messages (such as likes).
onlineUserOnly
Whether the message can be received by online users only
YES
YES
If it is set to `true`, the message cannot be pulled when a receiver pulls historical messages. This is often used to implement weak prompts, such as "The other party is typing..." and unimportant prompts in a group.
offlinePushInfo
Offline push message
YES
YES
The title and content carried when a message is pushed offline.
progress
File upload progress
YES
YES
File upload progress. It applies to sending messages that contain rich media such as images, audios, videos, and files. There is no callback for pure text, emoji, and location messages.
succ
Callback for successful message sending
YES
YES
-
fail
Callback for failed message sending
YES
YES
Callback failure error code and error description.

API prototype:
// V2TIMMessageManager
virtual V2TIMString SendMessage(
V2TIMMessage& message,
const V2TIMString& receiver,
const V2TIMString& groupID,
V2TIMMessagePriority priority,
bool onlineUserOnly,
const V2TIMOfflinePushInfo& offlinePushInfo,
V2TIMSendCallback* callback);
Parameter description:
Parameter
Definition
Valid for One-to-One Chat
Valid for Group Chat
Description
message
Message object
YES
YES
It needs to be created through the createXxxMessage API. Here, Xxx indicates the specific type.
receiver
userID of the one-to-one message receiver
YES
NO
Just specify receiver for sending one-to-one chat messages.
groupID
groupID of the group chat
NO
YES
Just specify groupID for sending group messages.
priority
Message priority
NO
YES
Set a higher priority for important messages (such as red packets and gifts) and a lower priority for frequent and unimportant messages (such as likes).
onlineUserOnly
Whether the message can be received by online users only
YES
YES
If it is set to true, the message cannot be pulled when a receiver pulls historical messages. This is often used to implement weak prompts, such as "The other party is typing..." and unimportant prompts in a group.
offlinePushInfo
Offline push message
YES
YES
The title and content carried when a message is pushed offline.
callback
Callback for message sending
YES
YES
Includes the callback for upload progress, callback for successful sending, and callback for failed sending.

Caution
If both groupID and receiver are set, targeted group messages are sent to receiver. For more information, see Targeted Group Message.

Sending a Text Message

Text messages include one-to-one messages and group messages, which are different in terms of API and parameters.
The ordinary and advanced APIs can be used to send text messages. The latter supports more sending parameters (such as priority and offline push message). The ordinary API is as described below, while the advanced API is sendMessage mentioned above.

One-to-one text message

Basic API

Call the sendC2CTextMessage API (Android / iOS and macOSWindows) to send a one-to-one text message simply by passing in the message content and receiver's userID.
Sample code:
Android
iOS and macOS
Windows
// `msgID` returned by the API for on-demand use
String msgID = V2TIMManager.getInstance().sendC2CTextMessage("One-to-one text message", "receiver_userID", new V2TIMValueCallback<V2TIMMessage>() {
@Override
public void onSuccess(V2TIMMessage message) {
// The one-to-one text message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the one-to-one text message
}
});
// `msgID` returned by the API for on-demand use
NSString *msgID = [[V2TIMManager sharedInstance] sendC2CTextMessage:@"One-to-one text message"
to:@"receiver_userID"
succ:^{
// The one-to-one text message sent successfully
} fail:^(int code, NSString *msg) {
// Failed to send the one-to-one text message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The one-to-one text message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the one-to-one text message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the text message.
});
// `msgID` returned by the API for on-demand use
V2TIMString msgID =
V2TIMManager::GetInstance()->SendC2CTextMessage("One-to-one text message", "receiver_userID", callback);

Advanced API

The advanced API can be called to send a one-to-one text message in two steps:
1. Call createTextMessage (Android / iOS and macOSWindows) to create a text message.
2. Call sendMessage (Android / iOS and macOSWindows) to send the message.
Sample code:
Android
iOS and macOS
Windows
// Create a text message
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createTextMessage("content");
// Send the message
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, "userID", null, V2TIMMessage.V2TIM_PRIORITY_NORMAL, false, null, new V2TIMSendCallback<V2TIMMessage>() {
@Override
public void onProgress(int progress) {
// The progress is not called back for the text message.
}

@Override
public void onSuccess(V2TIMMessage message) {
// The text message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the text message
}
});
// Create a text message
V2TIMMessage *message = [[V2TIMManager sharedInstance] createTextMessage:@"content"];
// Send the message
[V2TIMManager.sharedInstance sendMessage:message
receiver:@"userID"
groupID:nil
priority:V2TIM_PRIORITY_NORMAL
onlineUserOnly:NO
offlinePushInfo:nil
progress:nil
succ:^{
// The text message sent successfully
}
fail:^(int code, NSString *desc) {
// Failed to send the text message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

// Create a text message
V2TIMMessage v2TIMMessage = V2TIMManager::GetInstance()->GetMessageManager()->CreateTextMessage("One-to-one text message");
// Send the message
auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The progress is not called back for the text message.
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the text message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the text message.
});
V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
v2TIMMessage, "userID", {}, V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, false, {}, callback);

Group text message

Basic API

Call sendGroupTextMessage (Android / iOS and macOSWindows) to send a group message simply by passing in the message content, groupID of the group chat, and message priority.
For message priorities, see the V2TIMMessagePriority definition.
Sample code:
Android
iOS and macOS
Windows
// `msgID` returned by the API for on-demand use
String msgID = V2TIMManager.getInstance().sendGroupTextMessage("Group text message", "groupID", V2TIMMessage.V2TIM_PRIORITY_NORMAL, new V2TIMValueCallback<V2TIMMessage>() {
@Override
public void onSuccess(V2TIMMessage message) {
// The group text message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the group text message
}
});
// `msgID` returned by the API for on-demand use
NSString *msgID = [[V2TIMManager sharedInstance] sendGroupTextMessage:@"Group text message"
to:@"groupID" // `groupID` of the group chat
priority:V2TIM_PRIORITY_NORMAL // Message priority
succ:^{
// The group text message sent successfully
} fail:^(int code, NSString *msg) {
// Failed to send the group text message
}];
class SendGroupTextMessageCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendGroupTextMessageCallback() = default;
~SendGroupTextMessageCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallbackprogress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}
void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

auto callback = new SendGroupTextMessageCallback;
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The group text message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the group text message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the text message.
});
// `msgID` returned by the API for on-demand use
V2TIMString msgID = V2TIMManager::GetInstance()->SendGroupTextMessage(
"Group text message", "groupID", V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, callback);

Advanced API

The advanced API can be called to send a group text message in two steps:
1. Call createTextMessage (Android / iOS and macOSWindows) to create a text message.
2. Call sendMessage (Android / iOS and macOSWindows) to send the message.
Sample code:
Android
iOS and macOS
Windows
// Create a text message
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createTextMessage("content");
// Send the message
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, null, "receiver_groupID", V2TIMMessage.V2TIM_PRIORITY_NORMAL, false, null, new V2TIMSendCallback<V2TIMMessage>() {
@Override
public void onProgress(int progress) {
// The progress is not called back for the text message.
}

@Override
public void onSuccess(V2TIMMessage message) {
// The group text message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the group text message
}
});
// Create a text message
V2TIMMessage *message = [[V2TIMManager sharedInstance] createTextMessage:content];
// Send the message
[V2TIMManager.sharedInstance sendMessage:message
receiver:nil
groupID:@"receiver_groupID" // `groupID` of the group chat
priority:V2TIM_PRIORITY_NORMAL // Message priority
onlineUserOnly:NO // For online users only
offlinePushInfo:nil // Custom information for offline push
progress:nil
succ:^{
// The text message sent successfully
}
fail:^(int code, NSString *desc) {
// Failed to send the text message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

// Create a text message
V2TIMMessage v2TIMMessage = V2TIMManager::GetInstance()->GetMessageManager()->CreateTextMessage("Group text message");
// Send the message
auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The group text message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the group text message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the text message.
});
V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
v2TIMMessage, {}, "receiver_groupID", V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, false, {}, callback);

Sending a Custom Message

Custom messages include one-to-one messages and group messages, which are different in terms of APIs and parameters. The ordinary and advanced APIs can be used to send custom messages. The advanced API is sendMessage mentioned above (Android / iOS and macOSWindows), which supports more sending parameters (such as priority and offline push message) than the ordinary API.

Custom one-to-one message

Basic API

Call sendC2CCustomMessage (Android / iOS and macOSWindows) to send a custom one-to-one message simply by passing in the binary content and receiver's userID.
Sample code:
Android
iOS and macOS
Windows

String msgID = V2TIMManager.getInstance().sendC2CCustomMessage("Custom one-to-one message".getBytes(), "receiver_userID", new V2TIMValueCallback<V2TIMMessage>() {
@Override
public void onSuccess(V2TIMMessage message) {
// The custom one-to-one message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the custom one-to-one message
}
});
NSData *customData = [@"Custom one-to-one message" dataUsingEncoding:NSUTF8StringEncoding];
NSString *msgID = [[V2TIMManager sharedInstance] sendC2CCustomMessage:customData
to:@"receiver_userID" // Receiver's `userID`
succ:^{
// The custom one-to-one message sent successfully
}
fail:^(int code, NSString *msg) {
// Failed to send the custom one-to-one message
}];
class SendC2CCustomMessageCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendC2CCustomMessageCallback() = default;
~SendC2CCustomMessageCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}
void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The custom one-to-one message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the custom one-to-one message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the custom message.
});
V2TIMString str = u8"Custom one-to-one message";
V2TIMBuffer customData = {reinterpret_cast<const uint8_t*>(str.CString()), str.Size()};
V2TIMString msgID = V2TIMManager::GetInstance()->SendC2CCustomMessage(customData, "receiver_userID", callback);

Advanced API

The advanced API can be called to send a custom one-to-one message in two steps:
1. Call createCustomMessage (Android / iOS and macOSWindows) to create a custom message.
2. Call sendMessage (Android / iOS and macOSWindows) to send the message.
Sample code:
Android
iOS and macOS
Windows
// Create a custom message
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createCustomMessage("Custom one-to-one message".getBytes());
// Send the message
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, "receiver_userID", null, V2TIMMessage.V2TIM_PRIORITY_NORMAL, false, null, new V2TIMSendCallback<V2TIMMessage>() {
@Override
public void onProgress(int progress) {
// The progress is not called back for the custom message.
}

@Override
public void onSuccess(V2TIMMessage message) {
// The custom one-to-one message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the custom one-to-one message
}
});
V2TIMMessage *message = [[V2TIMManager sharedInstance] createCustomMessage:data];
[[V2TIMManager sharedInstance] sendMessage:message
receiver:@"receiver_userID" // Receiver's `userID`
groupID:nil
priority:V2TIM_PRIORITY_DEFAULT // Message priority
onlineUserOnly:NO
offlinePushInfo:nil
progress:nil
succ:^{
// The custom one-to-one message sent successfully
} fail:^(int code, NSString *desc) {
// Failed to send the custom one-to-one message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

// Create a custom message
V2TIMString str = u8"Custom one-to-one message";
V2TIMBuffer customData = {reinterpret_cast<const uint8_t*>(str.CString()), str.Size()};
V2TIMMessage v2TIMMessage = V2TIMManager::GetInstance()->GetMessageManager()->CreateCustomMessage(customData);
// Send the message
auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The custom one-to-one message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the custom one-to-one message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the custom message.
});
V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
v2TIMMessage, "receiver_userID", {}, V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, false, {}, callback);

Custom group message

Basic API

Call sendGroupCustomMessage (Android / iOS and macOSWindows) to send a custom group message simply by passing in the binary content, groupID of the group chat, and priority. For message priorities, see the V2TIMMessagePriority definition.
Sample code:
Android
iOS and macOS
Windows
String msgID = V2TIMManager.getInstance().sendGroupCustomMessage("Custom group message".getBytes(), "groupID", V2TIMMessage.V2TIM_PRIORITY_NORMAL, new V2TIMValueCallback<V2TIMMessage>() {
@Override
public void onSuccess(V2TIMMessage message) {
// The custom group message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the custom group message
}
});
NSData *customData = [@"Custom group message" dataUsingEncoding:NSUTF8StringEncoding];
NSString *msgID = [[V2TIMManager sharedInstance] sendGroupCustomMessage:customData
to:@"receiver_groupID" // `groupID` of the group chat
priority:V2TIM_PRIORITY_HIGH // Message priority
succ:^{
// The custom group message sent successfully
} fail:^(int code, NSString *msg) {
// Failed to send the custom group message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The custom group message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the custom group message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the custom message.
});
V2TIMString str = u8"Custom group message";
V2TIMBuffer customData = {reinterpret_cast<const uint8_t*>(str.CString()), str.Size()};
V2TIMString msgID = V2TIMManager::GetInstance()->SendGroupCustomMessage(
customData, "groupID", V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, callback);

Advanced API

The advanced API can be called to send a custom group message in two steps:
1. Call createCustomMessage (Android / iOS and macOSWindows) to create a custom message.
2. Call sendMessage (Android / iOS and macOSWindows) to send the message.
Sample code:
Android
iOS and macOS
Windows
// Create a custom message
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createCustomMessage("Custom group message".getBytes());
// Send the message
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, "receiver_userID", null, V2TIMMessage.V2TIM_PRIORITY_NORMAL, false, null, new V2TIMSendCallback<V2TIMMessage>() {
@Override
public void onProgress(int progress) {
// The progress is not called back for the custom message.
}

@Override
public void onSuccess(V2TIMMessage message) {
// The custom group message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the custom group message
}
});
V2TIMMessage *message = [[V2TIMManager sharedInstance] createCustomMessage:data];
[[V2TIMManager sharedInstance] sendMessage:message
receiver:nil
groupID:@"receiver_groupID" // `groupID` of the group chat
priority:V2TIM_PRIORITY_DEFAULT // Message priority
onlineUserOnly:NO
offlinePushInfo:nil
progress:nil
succ:^{
// The custom group message sent successfully
} fail:^(int code, NSString *desc) {
// Failed to send the custom group message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

// Create a custom message
V2TIMString str = u8"Custom group message";
V2TIMBuffer customData = {reinterpret_cast<const uint8_t*>(str.CString()), str.Size()};
V2TIMMessage v2TIMMessage = V2TIMManager::GetInstance()->GetMessageManager()->CreateCustomMessage(customData);
// Send the message
auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The custom group message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the custom group message
delete callback;
},
[=](uint32_t progress) {
// The progress is not called back for the custom message.
});
V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
v2TIMMessage, {}, "receiver_groupID", V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, false, {}, callback);

Sending a Rich Media Message

A rich media message can be sent in the following steps:
1. Call createXxxMessage to create a rich media message object of a specified type. Here, Xxx indicates the specific message type.
2. Call sendMessage (Android / iOS and macOSWindows) to send the message.
3. Get the callback for message sending success or failure.

Image message

To create an image message, you need to get the local image path first. During message sending, the image is uploaded to the server, and the upload progress is called back. The message is sent after the image is uploaded successfully.
Sample code:
Android
iOS and macOS
Windows
// Create an image message
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createImageMessage("/sdcard/xxx");
// Send the message
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, "receiver_userID", null, V2TIMMessage.V2TIM_PRIORITY_NORMAL, false, null, new V2TIMSendCallback<V2TIMMessage>() {
@Override
public void onProgress(int progress) {
// Image upload progress in the range of [0, 100]
}

@Override
public void onSuccess(V2TIMMessage message) {
// The image message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the image message
}
});
// Get the local image path
NSString *imagePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"png"];
// Create an image message
V2TIMMessage *message = [[V2TIMManager sharedInstance] createImageMessage:imagePath];
// Send the message
[[V2TIMManager sharedInstance] sendMessage:message
receiver:@"userID"
groupID:nil
priority:V2TIM_PRIORITY_DEFAULT
onlineUserOnly:NO
offlinePushInfo:nil
progress:^(uint32_t progress) {
// Image upload progress in the range of [0, 100]
} succ:^{
// The image message sent successfully
} fail:^(int code, NSString *desc) {
// Failed to send the image message
}];
class SendCallback final : public V2TIMSendCallback {
public:
using SuccessCallback = std::function<void(const V2TIMMessage&)>;
using ErrorCallback = std::function<void(int, const V2TIMString&)>;
using ProgressCallback = std::function<void(uint32_t)>;

SendCallback() = default;
~SendCallback() override = default;

void SetCallback(SuccessCallback success_callback, ErrorCallback error_callback,
ProgressCallback progress_callback) {
success_callback_ = std::move(success_callback);
error_callback_ = std::move(error_callback);
progress_callback_ = std::move(progress_callback);
}

void OnSuccess(const V2TIMMessage& message) override {
if (success_callback_) {
success_callback_(message);
}
}
void OnError(int error_code, const V2TIMString& error_message) override {
if (error_callback_) {
error_callback_(error_code, error_message);
}
}
void OnProgress(uint32_t progress) override {
if (progress_callback_) {
progress_callback_(progress);
}
}

private:
SuccessCallback success_callback_;
ErrorCallback error_callback_;
ProgressCallback progress_callback_;
};

// Create an image message
V2TIMMessage v2TIMMessage =
V2TIMManager::GetInstance()->GetMessageManager()->CreateImageMessage("./File/Xxx.jpg");
// Send the message
auto callback = new SendCallback{};
callback->SetCallback(
[=](const V2TIMMessage& message) {
// The image message sent successfully
delete callback;
},
[=](int error_code, const V2TIMString& error_message) {
// Failed to send the image message
delete callback;
},
[=](uint32_t progress) {
// Image upload progress in the range of [0, 100]
});
V2TIMManager::GetInstance()->GetMessageManager()->SendMessage(
v2TIMMessage, "receiver_userID", {}, V2TIMMessagePriority::V2TIM_PRIORITY_NORMAL, false, {}, callback);

Audio message

To create an audio message, you need to get the local audio file path and audio duration first, the latter of which can be used for display on the receiver UI. During message sending, the audio is uploaded to the server, and the upload progress is called back. The message is sent after the audio is uploaded successfully.
Sample code:
Android
iOS and macOS
Windows
// Create an audio message
V2TIMMessage v2TIMMessage = V2TIMManager.getMessageManager().createSoundMessage("/sdcard/xxx", 5);
// Send the message
V2TIMManager.getMessageManager().sendMessage(v2TIMMessage, "receiver_userID", null, V2TIMMessage.V2TIM_PRIORITY_NORMAL, false, null, new V2TIMSendCallback<V2TIMMessage>() {
@Override
public void onProgress(int progress) {
// Audio upload progress in the range of [0, 100]
}

@Override
public void onSuccess(V2TIMMessage message) {
// The audio message sent successfully
}

@Override
public void onError(int code, String desc) {
// Failed to send the audio message
}
});
// Get the local audio file path
NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"m4a"];
// Get the audio duration (which is only used for UI display)
AVURLAsset *asset = [AVURLAsset assetWithURL:[NSURL fileURLWithPath:soundPath]];
CMTime time = [asset duration];
int duration = ceil(time.value/time.timescale);
// Create an audio message
V2TIMMessage *message = [[V2TIMManager sharedInstance] createSoundMessage:soundPath duration:duration];
// Send the message
[[V2TIMManager sharedInstance] sendMessage:message
receiver:@"userID"
groupID:nil
priority:V2TIM_PRIORITY_DEFAULT
onlineUserOnly:NO
offlinePushInfo:nil
progress:^(uint32_t progress) {
// Audio upload progress in the range of [0, 100]
} succ:^{
// The audio message sent successfully
} fail:^(int code, NSString *desc) {
// Failed to send the audio message
}];
class SendCallback