NSIndexPath(转)

编辑器加载中...是Foundation框架中的一个普通的类，它提供了到嵌套数列的树中特定节点的路径，事实上，它是一个整数阵列，表格视图使用这个去表现在特定章节中的特定行，UITableView用的所有索引路径正好有两个元素，第一个是章节，第二个是行。 NSIndexPath和TableViews @interfaceNSIndexPath (UITableView) { } +(NSIndexPath*)indexPathForRow:(NSUInteger)row inSection:(NSUInteger)section; @property(nonatomic,readonly)NSUIntegerrow; @property(nonatomic,readonly)NSUIntegersection; @end NSIndexPath是一種特別的資料類別，這是用來表示一個路徑，這個路徑是指到一個從0開始的巢狀集合陣列樹狀結構的某個節點。iPhone OS為UITableView擴充了這個類別（見NSIndexPath UIKit Additions這是用分類擴充），加入了一個用來建立新的NSIndexPath實體的「(NSIndexPath *)indexPathForRow:(NSUInteger)row inSection:(NSUInteger)section」方法和row和section兩個屬性。 原帖：http://blog.163.com/hw707@126/blog/static/68486388201011255624582/ 原博文：http://blog.csdn.net/bellajo/article/details/6772556 nsindexpath的compare方法： compare: Indicates the depth-first traversal order of the receiving index path and another index path. - (NSComparisonResult)compare:(NSIndexPath *)indexPath Parameters indexPath Index path to compare. This value must not be nil. If the value is nil, the behavior is undefined. Return Value The depth-first traversal ordering of the receiving index path and indexPath. NSOrderedAscending: The receiving index path comes before indexPath. NSOrderedDescending: The receiving index path comes after indexPath. NSOrderedSame: The receiving index path and indexPath are the same index path. Availability Available in Mac OS X v10.4 and later. Declared In NSIndexPath.h