Swift的聊天框架 Chatto

Chatto 是一个 Swift 的聊天框架，可以很容易地实现类似信息 app 那样的聊天界面，包括图片发送，内容分页，可交互的键盘等等，是一个实现非常完整的解决方案。

示例代码：

1. Subclass ChatViewController
2. Override createChatInputView() to use ChattoAdditions.ChatInputBar or provide your own component
3. Provide a data source with your messages
4. Override createPresenterBuilders(). There will be a presenter for each message that will be responsible for the UI of that message.

override func createPresenterBuilders() -> [ChatItemType: [ChatItemPresenterBuilderProtocol]] {
    return [
        TextMessageModel.chatItemType: [
            TextMessagePresenterBuilder(
                viewModelBuilder: TextMessageViewModelDefaultBuilder(),
                interactionHandler: TextMessageHandler(baseHandler: self.baseMessageHandler)
            )
        ]
    ]
}

override func createChatInputView() -> UIView {
    let chatInputView = ChatInputBar.loadNib()
    self.configureChatInputBar(chatInputView)
    self.chatInputPresenter = ChatInputBarPresenter(chatInputView: chatInputView, chatInputItems: self.createChatInputItems())
    return chatInputView
}

override func viewDidLoad() {
    super.viewDidLoad()
    self.chatDataSource = self.myDataSource
}