Supporting undo and redo

Much like copy and paste, undo and redo are also expected and necessary tools for easy text management on iOS. For the user looking to write a long paper on iPad or keep class notes on an iPod touch, these tools are essential.

If we want to make our app universally acceptable, including these features is a must. Over the next few pages, we'll look at the positives and negatives of including such abilities.

Getting ready

Redo and undo require little design preparation; however we should make sure that copy and paste have already been implemented into our app. These two features typically come together hand-in-hand, and if we won't be including copy and paste into our work for some specific reason, we probably won't be including redo and undo either.

How to do it...

Undo and redo are fairly simple text commands in any operating system, allowing for the user to quickly correct any mistakes made on screen. The functions are not as absolutely necessary as they are...