To be Independent

what is "submitted url seems to be a soft 404" and my fix;

weekly algorithm summary of Stack;

使用UIAlertController时的内存问题探讨;

summary of weekly algorithm Study;

IoC study from theory to implementation;

a record for UICollectionView crash by invalid number index;

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；