What does it mean when you put an @ before an integer in Objective-C?

问题

What does it mean when you put an @ before an integer in Objective-C? Like so:

@4

回答1:

It is the NSNumber literal. A shortcut for this:

[NSNumber numberWithInt:4];

来源：https://stackoverflow.com/questions/17629874/what-does-it-mean-when-you-put-an-before-an-integer-in-objective-c