@[] 和 [NSArray arrayWithObjects:] 的区别

问题描述

可能的重复:
我应该更喜欢使用文字语法还是用于创建字典和数组的构造函数?

有什么区别:

NSArray *array = @[@"foo", @"bar"];

和

NSArray *array = [NSArray arrayWithObjects:@"foo", @"bar", nil];

其中之一是更稳定、更快还是其他什么?

Is one of those more stable, faster, or anything else?

推荐答案

这个文档没有直接提到效率，但确实提到了

This documentation doesn't mention anything about efficiency directly, but does mention that

NSArray *array = @[@"foo", @"bar"];

相当于

NSString *strings[3];
strings[0] = @"foo";
strings[1] = @"bar";
NSArray *array = [NSArray arrayWithObjects:strings count:2];

我必须假设在程序集级别，两者是相同的.

I would have to assume that at an assembly level, the two are identical.

因此唯一的区别是偏好.我更喜欢前者，打字更快，理解更直接.

Thus the only difference is preference. I prefer the former, it's faster to type and more direct to understand.

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