UIActionSheet

UIActionSheetを使うには,

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Upload"
                                                      delegate:self
                                             cancelButtonTitle:@"Cancel"
                                        destructiveButtonTitle:nil
                                             otherButtonTitles:@"DropBox", @"Evernote", nil];
[actionSheet showInView:self.view];