|--NSIndexPath实现机制

http://s5/mw690/79fded95gda9b527390c4&690- NSIndexPath" TITLE="NS类 - NSIndexPath" />

|--NSIndexPath里的方法

#import

@interface NSIndexPath : NSObject <</span>NSCopying, NSCoding> {

@private

__strong NSUInteger *_indexes;

NSUInteger _hash;

NSUInteger _length;

        void *_reserved;

}

+ (id)indexPathWithIndex:(NSUInteger)index;

+ (id)indexPathWithIndexes:(const NSUInteger [])indexes length:(NSUInteger)length;

- (id)initWithIndex:(NSUInteger)index;

- (id)initWithIndexes:(const NSUInteger [])indexes length:(NSUInteger)length;    // designated initializer

- (NSIndexPath *)indexPathByAddingIndex:(NSUInteger)index;

- (NSIndexPath *)indexPathByRemovingLastIndex;

- (NSUInteger)indexAtPosition:(NSUInteger)position;

- (NSUInteger)length;

- (void)getIndexes:(NSUInteger *)indexes;

// comparison support

- (NSComparisonResult)compare:(NSIndexPath *)otherObject; // sorting an array of indexPaths using this comparison results in an array representing nodes in depth-first traversal order

@end

Demo 建一个indexpath给一个Tableview

         然后当过来的index值的时候选中一个section滚动到顶部

-(void)selectTimeShowLrc:(NSUInteger)index

{

    NSIndexPath* indexPath = [NSIndexPath indexPathForRow:index inSection:0];

    [_LRCTableView selectRowAtIndexPath:indexPath animated:YES scrollPosition:UITableViewScrollPositionTop];

}