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Determine when header sticks in UITableView


NSIndexPath has to members. section and row.

The row member gives you zero information about what section you are in. All it does it tell you what row this path is in the given section, identified by the section member.

We can determine what section an NSIndexPath belongs to by checking the section member:

switch topCellPath.section {
    case 0:
        // top visible cell is in section 0
    case 1:
        // top visible cell is in section 1
    // etc. etc.
    default:
        // top visible cell is in some other
section
}

And we already know how to relate this section number to our data model... we used this to set the header in:

tableView(UITableView,
viewForHeaderInSection: Int) -> UIView

Categories : IOS

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