Alert view is working in one class, but not the other - iphone

Question

I have a class name viewController and it has the following code below and it works fine. However, when I call check from my subclass controller it doesn't work the way I want it to.The UIAlertView shows up, but it isn't able to detect when button index 0 is touched.Any workaround for this.
-(void)check{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"You Lose!"
message:#"Play Again?"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:#"OK", nil];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) { // and they clicked OK.
ViewController*myNewVC = [[ViewController alloc] init];
[self presentModalViewController:myNewVC animated:NO];
}
}

Answer 1

Add UIAlertViewDelegate in your subclass .h file like bellow..
#interface yourSubClassViewController :UIViewController <UIAlertViewDelegate>{
/// your code
}
#end

Answer 2

The Cancel button will be the index "0", Try for index==1.
Use this method:
-(void)check{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"You Lose!"
message:#"Play Again?"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:#"PopUp", nil];
[alert show];
}
- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {
NSLog("Cancel Button clicked);
}
else if (buttonIndex == 1) {
ViewController*myNewVC = [[ViewController alloc] init];
[self presentModalViewController:myNewVC animated:NO];
}

Answer 3

Don't use cancel button. Use two buttons otherButtonTitles and use the buttons index == 1 and button index == 2 . That may help.

Answer 4

You need to set the delegate to your subclass.
-(void)check:(id)delegate{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"You Lose!"
message:#"Play Again?"
delegate:delegate
cancelButtonTitle:#"OK"
otherButtonTitles:#"OK", nil];
[alert show];
}
and you call it [self check:self];