LeanChat iOS Chat Room Controller | Generated by AI
This is a Chat Room View Controller (CDChatRoomVC) from the LeanChat iOS application, which implements a full-featured chat interface. Here’s a breakdown of its core functionality:
🏗️ Core Architecture
- Inherits from
XHMessageTableViewController(a message UI framework) - Uses LeanCloud (AVIM) as the backend for real-time messaging
- Manages an AVIMConversation for group or 1-on-1 chats
📱 Key Features
Message Handling
- Send messages: Text, images, videos, voice, emotions, and location
- Receive messages in real-time via notifications
- Message status tracking: Sending, sent, delivered, failed
- Retry failed messages
- Load message history with pagination
Media Support
- Images: Capture from camera or pick from gallery
- Voice messages: Record and play with visual animation
- Videos: Send and display
- Location sharing: With map preview
- Emotions/Stickers: Custom emotion packs
UI Components
- Message bubbles with different styles for sent/received
- Input toolbar with emotion picker and media options
- Status indicator for connection state
- Timestamp display for messages
- Avatar display for users
Data Management
- Local caching of messages and user data
- Offline support with failed message store
- Media file caching (images, videos, audio)
- Conversation state persistence
🔧 Technical Implementation
Lifecycle Management
- viewDidLoad: Sets up UI, registers notifications, loads initial messages
- viewDidAppear/Disappear: Manages conversation state and audio playback
- dealloc: Cleans up observers and resources
Notification Handling
kCDNotificationMessageReceived: New incoming messageskCDNotificationMessageDelivered: Message delivery confirmationskCDNotificationConversationUpdated: Conversation metadata changeskCDNotificationConnectivityUpdated: Network connection changes
Message Processing Pipeline
- Convert AVIM messages to XHMessage format for display
- Cache media files and user data locally
- Update UI and scroll to newest message
- Track delivery status and update accordingly
Error Handling
- Network failures: Automatic retry with visual feedback
- File operations: Local storage error handling
- Message sending: Fallback to local storage when failed
This controller serves as the main chat interface, handling everything from user interaction to backend communication while providing a smooth, responsive messaging experience.