标签：des style color io strong sp on c ad
Operation Queues
operation object是 NSOperation class实例用来封装想要执行的任务。nsoperation class是抽象类必须子类化。
Creating an NSInvocationOperation Object
Concurrency and Application Design (三)
标签：des style color io strong sp on c ad
原文地址：http://www.cnblogs.com/lisa090818/p/3986302.html
