Obj-C：[NSString stringWithString：@" string"] vs. @“string”
我看过人们做了 [NSString stringWithString：@some string] 。为什么不只是 @一些字符串？
I've seen people do something like [NSString stringWithString:@"some string"]. Why not just do @"some string"?
例如，查看facebook-ios-sdk。
For an example, look at the facebook-ios-sdk.
NSString stringWithString - 什么是point？是一个类似的问题，但没有答案地址 [NSString stringWithString：@some string] vs. @一些字符串。
NSString stringWithString - what's the point? is a similar question, but none of the answers address [NSString stringWithString:@"some string"] vs. @"some string".
实际上没有区别。 [NSString stringWithString：str] 不执行任何操作，并返回 str if str 已不可变。
Actually there is no difference. [NSString stringWithString: str] just does nothing and returns str if str is immutable already.