目标C中的插入号 [英] Caret in objective C

问题描述

目标C中的插入符号是什么意思?

What does the caret in objective C mean?

即.

void (^handler)(NSInteger);

来自推荐答案

这取决于上下文.在您显示的示例中，它用来表示一个块.插入符号也是基于C的语言中的按位XOR运算符-大多数程序员都使用会将其标识为，因此很高兴了解到，这两者都取决于它的出现位置，就像*等.

It depends on the context. In the example you show, it's used to denote a Block. The caret symbol is also the bitwise XOR operator in C-based languages — that's what most programmers would identify it as, so it's good to understand that it can be both depending on where it appears, much like *, etc.

我们建议参考时，只需添加苹果官方的Blocks参考书.

And while we're suggesting references, one simply has to include Apple's official Blocks reference.

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