Camera Sample Code in Iphone

AppDelegate.h
=========
//
//  AppDelegate.h
//  Genius
//
//  Created by Rajendra on 02/04/13.
//  Copyright (c) 2013 __Rajuandroid.blogspot.com__. All rights reserved.
//

#import <UIKit/UIKit.h>

@class ViewController;

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UINavigationController *navController;
@property (strong, nonatomic) ViewController *viewController;

@end

AppDelegate.m
============
//
//  AppDelegate.m
//  Genius
//
//  Created by Rajendra on 02/04/13.
//  Copyright (c) 2013 __Rajuandroid.blogspot.com__. All rights reserved.
//

#import "AppDelegate.h"

#import "ViewController.h"

@implementation AppDelegate
@synthesize navController;
@synthesize window = _window;
@synthesize viewController = _viewController;

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

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
    self.window.rootViewController = self.navController;
    [self.window makeKeyAndVisible];
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end
 ViewController.h
=============
 
//
//  ViewController.h
//  Genius
//
//  Created by Rajendra on 02/04/13.
//  Copyright (c) 2013 __Rajuandroid.blogspot.com__. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIActionSheetDelegate,UIImagePickerControllerDelegate,UINavigationControllerDelegate>{
    UIBarButtonItem *cameraButton;
}
@property (nonatomic, retain) UIImage* attachedImage;
@property (nonatomic, retain) UIBarButtonItem *cameraButton;
@end
 
ViewController.m
================

//
//  ViewController.m
//  Genius
//
//  Created by Rajendra on 02/04/13.
//  Copyright (c) 2013 __Rajuandroid.blogspot.com__. All rights reserved.
//
#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize attachedImage,cameraButton;
- (void)viewDidLoad
{
    [super viewDidLoad];
   
    cameraButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"camera.png"] style:UIBarButtonItemStyleBordered target:self action:@selector(showActionSheet:)];
   
    self.navigationItem.rightBarButtonItem = cameraButton;
    [cameraButton release];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
-(IBAction)showActionSheet:(id)sender {
    UIActionSheet *popupQuery = [[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Take Photo", @"Choose Photo", nil];
    popupQuery.actionSheetStyle = UIActionSheetStyleBlackOpaque;
    [popupQuery showFromToolbar:(UIToolbar *)self.view];
    [popupQuery release];
}
-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    UIImagePickerController* imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.delegate = self;
   
    if (buttonIndex == 0) {
        if ([UIImagePickerController isSourceTypeAvailable:
             UIImagePickerControllerSourceTypeCamera])
        {
            imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
            [self presentModalViewController:imagePicker animated:YES];
           
        }else {
            UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"" message:@"Camera is not available"
                                                                  delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
            [alertsuccess show];
        }
    } else if (buttonIndex == 1) {
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentModalViewController:imagePicker animated:YES];
       
    }
    else if (buttonIndex == 2) {
        //cancel clicked
    }
   
}


#pragma mark - pictures

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    self.attachedImage = nil;
    [self dismissModalViewControllerAnimated:YES];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
   
    [picker dismissModalViewControllerAnimated:YES];
   
    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
   
    self.attachedImage = image;
   
    dispatch_async(dispatch_get_main_queue(), ^{
        CGFloat scale = [self.view.window.screen scale];
        CGSize size = CGSizeMake(30., 30.);
        UIGraphicsBeginImageContextWithOptions(size, YES, scale);
        CGContextSetInterpolationQuality(UIGraphicsGetCurrentContext(), kCGInterpolationHigh);
        [image drawInRect:CGRectMake(0., 0., size.width, size.height)];
        UIImage* thumb = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
       
        cameraButton.image = thumb;
       
    });
}



@end