Fix UIActionSheet Cancel Button

I found that using the UIActionSheet, it seems that the “Cancel” button does not function well. It turns out to be a normal problem, where here gives the right answer. I followed the instruction and changed the code (self — is the

from

[self.actionSheet showInView:self.view]; // show from our table view (pops up in the middle of the table)

to

[self.actionSheet showInView:self.parentViewController.tabBarController.view];