some Useful Links

http://www.tutorialspoint.com/ios/index.html

http://rypress.com/tutorials/objective-c/

http://www.geekylemon.com/xcode-tutorials

Facebook and twitter post

ADD Framework:Social,Accounts

ViewController.h

#import <Social/Social.h>

#import <Accounts/Accounts.h>

@interface ViewController : UIViewController

-(IBAction)twitterPost:(id)sender;

-(IBAction)facebookPost:(id)sender;

Viewcontroller.M

-(IBAction)facebookPost:(id)sender{

    

    SLComposeViewController *controller = [SLComposeViewController

                                           composeViewControllerForServiceType:SLServiceTypeFacebook];

    SLComposeViewControllerCompletionHandler myBlock =

    ^(SLComposeViewControllerResult result){

        if (result == SLComposeViewControllerResultCancelled)

        {

            NSLog(@"Cancelled");

        }

        else

        {

            NSLog(@"Done");

        }

        [controller dismissViewControllerAnimated:YES completion:nil];

    };

    controller.completionHandler =myBlock;

    //Adding the Text to the facebook post value from iOS

    [controller setInitialText:@"My test post"];

    //Adding the URL to the facebook post value from iOS

    [controller addURL:[NSURL URLWithString:@"http://www.test.com"]];

    //Adding the Text to the facebook post value from iOS

    [self presentViewController:controller animated:YES completion:nil];

}

-(IBAction)twitterPost:(id)sender{

    SLComposeViewController *tweetSheet = [SLComposeViewController

                                           composeViewControllerForServiceType:SLServiceTypeTwitter];

    [tweetSheet setInitialText:@"My test tweet"];

    [self presentModalViewController:tweetSheet animated:YES];

}

Sending Mail

Add framework :MessageUI

Viewcontroller.h

#import <MessageUI/MessageUI.h>

@interface ViewController : UIViewController<MFMailComposeViewControllerDelegate>{

     MFMailComposeViewController *mailComposer;

}

-(IBAction)sendMail:(id)sender;

ViewController.M

-(IBAction)sendMail:(id)sender{

    mailComposer = [[MFMailComposeViewController alloc]init];

    mailComposer.mailComposeDelegate = self;

    [mailComposer setSubject:@"Test mail"];

    [mailComposer setMessageBody:@"Testing messagefor the test mail" isHTML:NO];

     [self presentModalViewController:mailComposer animated:YES];

     }

     

-(void)mailComposeController:(MFMailComposeViewController *)controller

             didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{

                 if (result) {

                     NSLog(@"Result : %d",result);

                 }

                 if (error) {

                     NSLog(@"Error : %@",error);

                 }

                 [self dismissModalViewControllerAnimated:YES];

                 

             }

Adjust size of the image programmatically-Taj

 UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"taj.jpg"]];

    imageView.frame = CGRectMake(50, 100, 217  ,217);

    self.view.center=imageView.center;

Move button through coding

viewcontroller.h

 IBOutlet UIButton *button;

viewController.m

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{

    UITouch *touch=[[event allTouches]anyObject];

    button.center=[touch locationInView:self.view];

}

Counting Timer

ViewController.h

@interface ViewController : UIViewController{

    NSTimer *timer;

    int MainInt;

     IBOutlet UIButton *drag;

}

@property (weak, nonatomic) IBOutlet UILabel *l1;

- (IBAction)click:(id)sender;

-(void)countup;

- (IBAction)stopTimer:(id)sender;

- (IBAction)reset:(id)sender;

viewcontroller.M

-(void)countup {

    MainInt += 1;

    l1.text = [NSString stringWithFormat:@"%i", MainInt];

    

    

}

- (IBAction)click:(id)sender {

    //MainInt = 0;

    if (timer==nil)

    {

    

    timer = [NSTimer scheduledTimerWithTimeInterval:1.0

                                             target:self selector:@selector(countup)userInfo:nil repeats:YES];

        

    }

}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{

    UITouch *touch=[[event allTouches]anyObject];

    drag.center=[touch locationInView:self.view];

    

}

- (IBAction)stopTimer:(id)sender

{

    if (timer != nil)

    {

        [timer invalidate];

        timer = nil;

    }

}

- (IBAction)reset:(id)sender {

    MainInt=0;

    

    

}

Audio and Video

1. ADD AVFoundation and Mediaplayer  Framworks
2.Import header file <AVFoundation/AVFoundation.h>
#import <MediaPlayer/MediaPlayer.h>

3.ViewController.h

@interface ViewController : UIViewController{

AVAudioPlayer *audioPlayer;

    MPMoviePlayerViewController *moviePlayer;

}

-(IBAction)playAudio:(id)sender;

-(IBAction)playVideo:(id)sender;

4.ViewController.M

-(IBAction)playAudio:(id)sender{

    NSString *path = [[NSBundle mainBundle]

                      pathForResource:@"song" ofType:@"mp3"];

    audioPlayer = [[AVAudioPlayer alloc]initWithContentsOfURL:

                   [NSURL fileURLWithPath:path] error:NULL];

    [audioPlayer play];

}

-(IBAction)playVideo:(id)sender{

    NSString *path = [[NSBundle mainBundle]pathForResource:

                      @"video" ofType:@"mov"];

    moviePlayer = [[MPMoviePlayerViewController

                    alloc]initWithContentURL:[NSURL fileURLWithPath:path]];

    [self presentModalViewController:moviePlayer animated:YES];

}