Question

I’m using a tab bar controller in my application.

I can change the view by clicking the buttons on the tab, but when I click the tab button it should display an alert for confirmation from the end user, like: “You should leave this page”.

If “Yes”, then navigate, otherwise it should stay on the same page…

The alert does not show up, though.

Answer 1

This is the code for alertview, call this in a method which gets called after tab button is clicked….And add UIAlertView delegate

     UIAlertView *myAlert=[[UIAlertView alloc]initWithTitle:@"Alert" message:@"You should leave this page" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil,nil];
     [myAlert show];
     [myAlert release];

Also override the method

       - (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
             if(actionSheet==myAlert){
                if (buttonIndex == 0)
                {
                //here call the corresponding page
                 }
                 }
         else
         {
                    //Do nothing
        NSLog(@"cancel");
         }

      }