The Core iOS Developer’s Cookbook, Fifth Edition

Building Simple Alerts

To create alerts, allocate a UIAlertView object. Initialize it with a title and an array of button titles. The title is an NSString, as are the button titles. In the button array, each string represents a single button that should be shown.

The method snippet shown here creates and displays the simplest alert scenario. It shows a message with a single OK button. The alert doesn’t bother with delegates or callbacks, so its lifetime ends when the user taps a button:

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- (void)showAlert:(NSString *)theMessage {     UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"Title"         message:theMessage         delegate:nil         cancelButtonTitle:@"OK"         otherButtonTitles:nil];     [av show]; ...