- Release Notes
- Product Introduction
- Purchase Guide
- Download
- Get Started
- Quick Integration Solution (Including UI Library) (Recommended)
- Self-implementing Integration Solution
- Client APIs
- SDK APIs (New)
- SDK APIs (Legacy)
- Server APIs
- Generating UserSig
- RESTful APIs
- RESTful API Overview
- RESTful API List
- Account Management
- One-to-One Messages
- Profile Management
- Pushing to All Users
- Relationship Chain Management
- Recent Contacts
- Group Management
- Getting All Groups in an App
- Creating a Group
- Getting Group Profiles
- Getting Group Member Profiles
- Modifying the Profile of a Group
- Adding Group Members
- Deleting Group Members
- Modifying the Profile of a Group Member
- Disbanding a Group
- Getting the Groups a User Has Joined
- Querying the Roles of Users in a Group
- Bulk Muting and Unmuting
- Getting the List of Muted Group Members
- Sending Ordinary Messages in a Group
- Sending System Messages in a Group
- Recalling Group Messages
- Changing Group Owner
- Importing a Group Profile
- Importing Group Messages
- Importing Group Members
- Setting the Unread Message Count of a Member
- Deleting Messages Sent by a Specified User
- Pulling Historical Messages
- Getting the Number of Online Users in an Audio-Video Group
- Getting Custom Group Attributes
- Modifying Custom Group Attributes
- Clearing Custom Group Attributes
- Resetting Custom Group Attributes
- Global Mute Management
- Operations Management
- Third-Party Callbacks
- Third-Party Callback Overview
- Callback Command List
- Online Status Callbacks
- Relationship Chain Callbacks
- One-to-One Message Callbacks
- Group System Callbacks
- Callback Before Creating a Group
- Callback After Creating a Group
- Callback Before Accepting a Request to Join a Group
- Callback Before Accepting a Request to Add a User to a Group
- Callback After a User Joins a Group
- Callback After a User Leaves a Group
- Callback Before Sending a Group Message
- Callback After Sending a Group Message
- Callback After a Group Is Full
- Callback After Disbanding a Group
- Callback After Modifying Group Profile
- Callbacks After Recalling Group Messages
- Callback Mutual Authentication Configuration Guide
- Use Cases
- Console Guide
- FAQs
- Security Compliance Certification
- IM Policy
- Smooth Migration Solutions
- Error Codes
- Contact Us
- Release Notes
- Product Introduction
- Purchase Guide
- Download
- Get Started
- Quick Integration Solution (Including UI Library) (Recommended)
- Self-implementing Integration Solution
- Client APIs
- SDK APIs (New)
- SDK APIs (Legacy)
- Server APIs
- Generating UserSig
- RESTful APIs
- RESTful API Overview
- RESTful API List
- Account Management
- One-to-One Messages
- Profile Management
- Pushing to All Users
- Relationship Chain Management
- Recent Contacts
- Group Management
- Getting All Groups in an App
- Creating a Group
- Getting Group Profiles
- Getting Group Member Profiles
- Modifying the Profile of a Group
- Adding Group Members
- Deleting Group Members
- Modifying the Profile of a Group Member
- Disbanding a Group
- Getting the Groups a User Has Joined
- Querying the Roles of Users in a Group
- Bulk Muting and Unmuting
- Getting the List of Muted Group Members
- Sending Ordinary Messages in a Group
- Sending System Messages in a Group
- Recalling Group Messages
- Changing Group Owner
- Importing a Group Profile
- Importing Group Messages
- Importing Group Members
- Setting the Unread Message Count of a Member
- Deleting Messages Sent by a Specified User
- Pulling Historical Messages
- Getting the Number of Online Users in an Audio-Video Group
- Getting Custom Group Attributes
- Modifying Custom Group Attributes
- Clearing Custom Group Attributes
- Resetting Custom Group Attributes
- Global Mute Management
- Operations Management
- Third-Party Callbacks
- Third-Party Callback Overview
- Callback Command List
- Online Status Callbacks
- Relationship Chain Callbacks
- One-to-One Message Callbacks
- Group System Callbacks
- Callback Before Creating a Group
- Callback After Creating a Group
- Callback Before Accepting a Request to Join a Group
- Callback Before Accepting a Request to Add a User to a Group
- Callback After a User Joins a Group
- Callback After a User Leaves a Group
- Callback Before Sending a Group Message
- Callback After Sending a Group Message
- Callback After a Group Is Full
- Callback After Disbanding a Group
- Callback After Modifying Group Profile
- Callbacks After Recalling Group Messages
- Callback Mutual Authentication Configuration Guide
- Use Cases
- Console Guide
- FAQs
- Security Compliance Certification
- IM Policy
- Smooth Migration Solutions
- Error Codes
- Contact Us
Application Scenarios
You can use the offline push feature to notify users upon the arrival of new messages even when the app is running in the background or the process has been killed. iOS devices use APNs for offline push, while Android users need to register for offline message callbacks.
iOS APNs Push Notifications
Push notification formats
The preceding figure shows the examples of a one-to-one chat message and group chat message.
For more information about iOS APNs push formats, see Push Formats.
Basic APIs
The following APIs must be called to support APNs. For more information, see iOS APNs Event Reporting:
- Set the token.
- Switch to the background and report unread messages.
- Switch to the foreground and push notifications.
Setting the Ext extension field
In some cases, an app needs to set the Ext extension field for push based on specific circumstances to facilitate user operations such as redirect clicks. You can input it into the Ext field in TIMCustomElem, and during push, the IM backend will input the field into Ext. Please refer to Customizing Offline Message Attributes to customize the extension field.
Setting push sounds
In some cases, an app needs to set the push sound of a single message to alert the user. You can input the sound into the sound field in TIMCustomElem, and during push, the IM backend will input the field into Ext. Please refer to Setting Custom Push Alert Sounds.
Android Offline Push
Android 1.8.0 and later versions support separating services from processes. When the app process is killed, the service survives and can continue to receive offline push notifications. For more information about the relevant settings and configuration, see Android Offline Push.
Sending Messages from the Backend
For iOS, you can refer to Push Formats to set the display format of APNs push messages; for Android, you can refer to Offline Push OfflinePushInfo to set the display format.
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