Report function tableview.
a scroll imageview to drag or double click to show detail info. 对图像可拖拽，双击，放大缩小图片
仿照京东地址选择器
a special label can show special color word in the label. 一个label能展示关键字的特殊颜色，特殊字体
alertView dropdown animation with a little spring // 一个带从上面掉落动画的 AlertView （提示框）
Imitate the VSCode layout
actionSheet(下方弹出框) 模仿微信（wechat）
In no network situation, use the placeholder view to show no no net connect , this also has closu...
a demo of search bar and search display controller in storyboard
regular expressions for check username, password length,telephone, wechat pay account, alipay acc...
