NSIndexpath.item与NSIndexpath.row [英] NSIndexpath.item vs NSIndexpath.row

问题描述

有没有人知道 NSIndexpath.row 和 NSIndexpath.item 之间的区别？

Does anyone know the difference between NSIndexpath.row and NSIndexpath.item?

具体来说，我使用哪一个：

Specifically, which one do I use in:

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;

推荐答案

好的，没有人在这里给出了一个好的答案。

Okay, nobody has given a good answer here.

内部NSIndexPath，索引被存储在被称为_indexes定义为NSUInteger *和数组的长度被存储在定义为NSUInteger_length一个简单的C数组。访问者section是_indexes [0]的别名，item和row都是_indexes [1]的别名。因此两者在功能上是相同的。

Inside NSIndexPath, the indexes are stored in a simple c array called "_indexes" defined as NSUInteger* and the length of the array is stored in "_length" defined as NSUInteger. The accessor "section" is an alias to "_indexes[0]" and both "item" and "row" are aliases to "_indexes[1]". Thus the two are functionally identical.

在编程风格方面 - 也许是定义链 - 你最好在表的上下文中使用row，并且项目在集合的上下文中。

In terms of programming style – and perhaps the definition chain – you would be better using "row" in the context of tables, and "item" in the context of collections.

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