Use a cancel block

[jaimeat1]

Thank you for this smart pod, it saves a lot of work and it's really easy to use!

As a future improvement, please consider add a cancel block as a new parameter in the method requestAuthenticationInView:andCompletion:, to be executed when user cancels action sheet.

Thanks!

[zrxq]

@jaimeat1 Meanwhile, you can work around this limitation using requestAuthenticationWithSelectCallback:andCompletion: (optionally utilising [PFTwitterAccountSelectDialog showSelectDialogInView:withItems:cancelButtonTitle:confirmBlock:cancelBlock:]), see https://github.com/prix-fixe/PFTwitterSignOn/blob/master/PFTwitterSignOn/PFTwitterSignOn.m#L54 for example.