iPhone UITableView. How do turn on the single letter alphabetical list like the Music App?

Question

In the iPhone music app, selecting Artist, Songs, or Albums presents a tableView with a verticl list of single letters at the righthand side of the UI that enables rapid scr

Answer 1

Here's a simple solution in Swift, assuming you have your title headers in an array. If the title couldn't be found, it will return the previous index in the array.

func sectionIndexTitlesForTableView(tableView: UITableView) -> [String]? {
    return "ABCDEFGHIJKLMNOPQRSTUVWXYZ".characters.flatMap{String($0)}
}

func tableView(tableView: UITableView, sectionForSectionIndexTitle title: String, atIndex index: Int) -> Int {
    return self.headerTitles.filter{$0 <= title}.count - 1
}