iOS/iPhone Adding Show Image Action Sheet (UIActionSheet) and Alert View (UIAlertView)

    sheet = [[UIActionSheet alloc] initWithTitle:@"Shared To"
                                        delegate:self
                               cancelButtonTitle:@"Cancel"
                          destructiveButtonTitle:@"Facebook"
                               otherButtonTitles:@"Twitter", @"Google Plus", @"Youtube", nil];
    
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:0] setImage:[UIImage imageNamed:@"facebook.png"] forState:UIControlStateNormal];
   
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:1] setImage:[UIImage imageNamed:@"twitter.png"] forState:UIControlStateNormal];
    
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:2] setImage:[UIImage imageNamed:@"google-plus.png"] forState:UIControlStateNormal];
    
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:3] setImage:[UIImage imageNamed:@"youtube.png"] forState:UIControlStateNormal];
    
    // Show the sheet
    [sheet showInView:self.view];
    [sheet release];

//
//  ViewController.h
//  ActionSheetImages
//
//  Created by Weerachai on 12/5/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIActionSheetDelegate>
{
    IBOutlet UILabel *lblResult;
}

- (IBAction)btnOpenSheet:(id)sender;

@end

//
//  ViewController.m
//  ActionSheetImages
//
//  Created by Weerachai on 12/5/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
{
    UIActionSheet *sheet;
}

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

- (IBAction)btnOpenSheet:(id)sender {
    
    sheet = [[UIActionSheet alloc] initWithTitle:@"Shared To"
                                        delegate:self
                               cancelButtonTitle:@"Cancel"
                          destructiveButtonTitle:@"Facebook"
                               otherButtonTitles:@"Twitter", @"Google Plus", @"Youtube", nil];
    
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:0] setImage:[UIImage imageNamed:@"facebook.png"] forState:UIControlStateNormal];
   
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:1] setImage:[UIImage imageNamed:@"twitter.png"] forState:UIControlStateNormal];
    
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:2] setImage:[UIImage imageNamed:@"google-plus.png"] forState:UIControlStateNormal];
    
    [[[sheet valueForKey:@"_buttons"] objectAtIndex:3] setImage:[UIImage imageNamed:@"youtube.png"] forState:UIControlStateNormal];
    
    // Show the sheet
    [sheet showInView:self.view];
    [sheet release];
    
}

- (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            lblResult.text = @" Your Selected Item 0";
            break;
        case 1:
            lblResult.text = @" Your Selected Item 1";
            break;
        case 2:
            lblResult.text = @" Your Selected Item 2";
            break;
        case 3:
            lblResult.text = @" Your Selected Item 3";
            break;
        case 4:
            lblResult.text = @" Your Selected Item 4";
            break;
        default:
            break;
    }
}

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

- (void)dealloc {
    [lblResult release];
    [super dealloc];
}

@end

    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Shared!"
                          message:@"Share to ?"
                          delegate: self
                          cancelButtonTitle:@"Facebook"
                          otherButtonTitles:@"Twitter", nil];
    
        [[[alert valueForKey:@"_buttons"] objectAtIndex:0] setImage:[UIImage imageNamed:@"facebook.png"] forState:UIControlStateNormal];
    
        [[[alert valueForKey:@"_buttons"] objectAtIndex:1] setImage:[UIImage imageNamed:@"twitter.png"] forState:UIControlStateNormal];
    
    [alert show];
    [alert release];