@esacaping
https://www.jianshu.com/p/4db19f1e9890
为什么要用weak self
https://www.jianshu.com/p/4bea27b3e92d
装饰者模式
https://www.jianshu.com/p/244ebd21d1c5
责任链模式
https://www.jianshu.com/p/b6532cb66203
Reading / Todo List
https://www.jianshu.com/p/789bea0de291
