字符：听说过时了，待测
https://blog.csdn.net/idoshi201109/article/details/52230130
七麦 ：付费的，待搞
iOS 上传图片压缩处理：搞定
https://www.jianshu.com/p/0b1d10cf8f61?from=groupmessage
https://www.jb51.net/article/104348.htm
https://www.cnblogs.com/heyode/p/6265399.html
masonry
https://www.jianshu.com/p/f5883db2411d
http://www.cocoachina.com/ios/20180312/22551.html
