UIAlertView buttonIndex not working - objective-c

Question

I guess I'm missing something obvious. I have UIAlertView to get app review but I can't get the buttons to do anything. I've called the UIAlertViewDelegate in my.h, I also have anther UIAlertview which is just on an IBAction btn and that works fine although it just had cancel btn.
I tried giving alert.tag = 1 but that never made any difference so I commented out my first UIAlertview, so I just have one alert, still no joy. I guess I am missing something simple.
I've also tried alertview.cancelButtonIndex or alertview.firstOtherButtonIndex instead of 0
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {
NSLog(#"index 0 ");
}
else if (buttonIndex == 1) {
NSLog(#"index 1 ");
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:#"www.google.com"]];
NSUserDefaults *rateApp = [NSUserDefaults standardUserDefaults];
NSInteger appLaunch = [ rateApp integerForKey:#"appLaunch"];
appLaunch = 0 ;
[rateApp setInteger: appLaunch forKey:#"appLaunch"];
}
else if (buttonIndex == 2) {
NSLog(#"index 2 ");
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
//rate app appLaunch == 5 || appLaunch ==10
NSUserDefaults *rateApp = [NSUserDefaults standardUserDefaults];
NSInteger appLaunch = [ rateApp integerForKey:#"appLaunch"];
if (appLaunch == 1 ) {
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Like this app ?" message:#"Why not rate at the app store" delegate:nil cancelButtonTitle:#"No thanks" otherButtonTitles:#"Yes",#"Remind me later", nil];
// alert.tag = 1;
[alert show];
}
Thanks for any help.

Answer 1

AlertView's delegate should be self instead of nil, if you want to invoke its delegate method.
Use this Code :
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Like this app ?"
message:#"Why not rate at the app store"
delegate:self
cancelButtonTitle:#"No thanks"
otherButtonTitles:#"Yes",#"Remind me later", nil];