To be Independent

a record for UICollectionView crash by invalid number index;

IoC study from theory to implementation;

correctly add child view controller with UINavigationController;

a note for Mobile-Friendly issue by my incorrect markdown writing

study notes of guard in Swift

记录UIViewController生命周期事件未运行问题的解决；

XSS实现的简单例子；

在阿里云上启用SWAP时，fallocate失败

国行iPhone上使用UIActivityViewController无法分享到 Facebook/Twitter

fix 401 error of Google Rest API;