Trigger Shake Event in iOS SDK programatically

Is it possible to trigger the shake programatically? I am using th开发者_运维百科e undo manager in my iOS app and its working fine when I shake the device. In addition, I would like to be able to provide a UIButton, so a user can trigger the undo manager without actually shaking the device.

Is this possible?

Thanks for any help,

I believe you can just call the -undo method on an instance of NSUndoManager, so set your button up to trigger that.

In addition, this tutorial may be helpful. It sets up an undo button as well as allowing shake to undo.