iOS4是否支持单向？

Question

Looking at this article: http://www.galloway.me.uk/tutorials/singleton-classes/

I have implemented a singleton, my question is the oneway (not using ARC) is it supported in iOS 4.0?

Answer 1

是的，它是可用的，单向是一个目标c关键字，它与给定的iOS SDK不相关

Answer 2

This is a design pattern which will remain unchanged as and when technology changes. So you can use it easily.

Answer 3

是的， oneway关键字是编译器提示。