弹出菜单

- (IBAction)Open:(id)sender {
    UIActionSheet *menu = [[UIActionSheet alloc]
                           initWithTitle:@"select" delegate:self cancelButtonTitle:@"cancel" destructiveButtonTitle:@"delete" otherButtonTitles:@"rename", nil];
    [menu showInView:self.view];
   }
-(void)actionSheet:(UIActionSheet*)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
}