摘要: The NSIndexSet class represents an immutable collection of unique unsigned integers, known as indexes because of the way they are used. This collection is referred to as a index set.You use index sets in your code to store indexes into some other data structure. For example, given an NSArray object, 阅读全文
posted @ 2012-02-01 11:37 松花江以南 阅读(6283) 评论(1) 推荐(2) 编辑