Question

I am in the process of reading the O’Reilly book Learning Cocoa with Objective-C 3rd edition.

The O’Reilly website doesn’t have a forum for this specific book, and searching for this error returns nothing.

On page 18, I keep getting the following error:

"No visible @interface for 'UIAlertView' declares the selector 'initWithTitle:message:deluge:cancelButtonTitle:otherButton'"

Here’s my code:

//
//  ViewController.m
//  HelloCocoa
//
//  Created by ME on 1/14/13.
//  Copyright (c) 2013 ME. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)showAlert:(id)sender
{
    UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Hello!"
                                                    message:@"Hello, World!"
                                                   delegate:nil
                                          cancelButtonTitle:@"Close"
                                           otherButtonTitle:nil];
    [alert show];
    [_helloButton setTitle:@"I was Clicked!" forState:UIControlStateNormal];
}
@end



//
//  ViewController.h
//  HelloCocoa
//
//  Created by ME on 1/14/13.
//  Copyright (c) 2013 Andrew DiNatale. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
@property (strong, nonatomic) IBOutlet UIView *helloButton;
- (IBAction)showAlert:(id)sender;
@end

What’s causing this error?

Answer 1

The otherButtonTitles parameter is plural (as in otherButtonTitle*s*).