UIAlertView Button Action

UPDATE – May 2016

UIAlertView is deprecated. You can now use UIAlertController as explained here.

Old Answer with UIAlertView

1. You can create a UIAlertView like this

   UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Really reset?" 
                             message:@"Do you really want to reset this game?" 
                             delegate:self 
                             cancelButtonTitle:@"Cancel" 
                             otherButtonTitles:@"reset", nil];
   
   [alert show];
   

2. To handle AlertView button click, you have to
   conform to UIAlertViewDelegate protocol.

   @interface YourViewController:UIViewController<UIAlertViewDelegate>{
     .......
     .......
   }
   

3. Then implement UIAlertViewDelegate protocol methods,

   - (void)alertView:(UIAlertView *)alertView 
                      clickedButtonAtIndex:(NSInteger)buttonIndex{
       if (buttonIndex == [alertView cancelButtonIndex]){
         //cancel clicked ...do your action
       }else{
         //reset clicked
       }
   }