How to create an NSIndexPath and specify its components

On occasion we need to create an NSIndexPath manually, with components we specify (such as a row or a section). There’s a method for that: indexPath:forItem:inSection.

Here’s how you create an indexPath for row 0, section 0:

NSIndexPath *indexPath = [[NSIndexPath alloc]init];
indexPath = [NSIndexPath indexPathForItem:0 inSection:0];

The method takes two integers. You can even take an existing indexPath, then add or subtract values to the new indexPath, like so:

// current indexPath
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

// make a new indexPath and add 1 to the row of the previous one
NSIndexPath *indexPath2 = [[NSIndexPath alloc]init];
indexPath2 = [NSIndexPath indexPathForItem:(indexPath.row + 1) inSection:indexPath.section];

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