实现聊天界面，功能齐全,聊天功能网络搭建相关，异步加载图片，时间限制-Realization chat interface, complete functions, chat network structures related to asynchronous load images, time limits

这是一份iOS版仿微信聊天界面的代码，能够实现聊天中的会话泡泡。仅仅支持文本和图片哦。-This is a micro-channel iOS version imitation chat interface code to achieve the chat conversation bubbles. Only supports text and picture oh.