本例仿照QQ聊天界面，科尔参考博客讲解
http://blog.csdn.net/to_be_designer/article/details/48163657
http://blog.csdn.net/to_be_designer/article/details/48163775
http://blog.csdn.net/to_be_designer/article/details/48164783
2019-12-21 21:16:51
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