How to run a method from a UIAlertView - iphone

Question

I want to have this method [User logOut]; run when a user touches the Log Me out button in the following UIAlertView.
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Logged in!" message:#"Logged in to App!" delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles:#"Log me out", nil];
[alert show];
[alert release];
how would I go about doing that? The "Okay" works for the cancel button. I just need the other button/method to work.
thanks for any help

Answer 1

You can do something like;
- (void)AlertConfirm
{
UIAlertView *alert = [[UIAlertView alloc] init];
[alert setTitle:#"Confirm"];
[alert setMessage:#"Log out?"];
[alert setDelegate:self];
[alert addButtonWithTitle:#"Yes"];
[alert addButtonWithTitle:#"No"];
[alert show];
[alert release];
}
And
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0)
{
// Yes, do something
}
else if (buttonIndex == 1)
{
// No
}
}
Good luck,
Nathan

Answer 2

You need to use the UIAlertView delegate method:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
Make sure you set yourself as the delegate of your alertView.

Answer 3

Set the alert view's delegate to be self, and in your .h add
The following delegate method will be called when a button is pressed:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
Then you can see what button was pressed by doing something like:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if ((alertView == alert) && (buttonIndex == 0))
NSLog(#"alert's \"Okay\" button was pressed");
else
NSLog(#"alert's \"Log Out" button was pressed");
}

Answer 4

Set your view controller to be the delegate of the UIAlertView:
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Logged in!" message:#"Logged in to App!" delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles:#"Log me out", nil];
alert.delegate = self;
[alert show];
[alert release];
Then handle in the delegate callback:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex == alertView.cancelButtonIndex) {
// Cancelled
return;
}
// Log them out
}
Note the test (buttonIndex == alertView.cancelButtonIndex). This is better form than checking an absolute value for the button index.