objective-c - NSArray 和快速枚举，总是按索引顺序进行？

Question

数组的快速枚举总是按索引顺序进行吗？

for (NSDictionary *zone in myArray)
{
    //do code
}

是否总是从索引位置 0、1、2、...、n 开始枚举？

与标准 for 循环相比，我更喜欢快速枚举，因为它使代码更易于阅读。

Answer 1

是的，它会:

For collections or enumerators that have a well-defined order—such as an NSArray or an NSEnumerator instance derived from an array—the enumeration proceeds in that order, so simply counting iterations gives you the proper index into the collection if you need it.

docs here