Question

UIAlertView *alert = [[UIAlertView alloc]
    initWithTitle:@"Error"
    message:@"Some failure message"
    delegate:self 
    cancelButtonTitle:@"cancel"
    otherButtonTitles:@"retry", nil
];  
[alert show];
[alert release];

I got two warnings pointing at this block of code.

• Unused variable ‘alert’
• Missing sentinel in function call

My code looks similar to all the examples online. Why is it broken?

Answer 1

This code works fine for me. Try cleaning all targets and building again to see if the error persists.

Because you call [alert show], you should not get an unused variable warning on alert.

Since you include nil after otherButtonTitles, you should not get a missing sentinel warning.