my app needs alert msg and with yes button click another alert msg which decides the final action. I have used - (void)alertView:(UIAlertView *)alertView didDismissWithB
Check this out http://www.timeister.com/2010/06/objc-show-alert-iphone/
// open a alert with an OK and cancel button
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"UIAlertView"
message:@"My message" delegate:self cancelButtonTitle:@"Cancel"
otherButtonTitles:@"OK", nil];
[alert show];
[alert release];