The document outlines key concepts in iOS application development, including the use of segues in storyboarding, dynamic UI design through coding, core animations, and implementing picture and sound managers. It details the lifecycle of segues, programming methods, and how to effectively manage images and sounds within an app. The document also provides code examples for initializing UI components, handling user input, and using system sounds.

2. iOS Application Development
-Hussain KMR Behestee
The Jaxara IT LTD.
[Session-3]

3. Agendas
∗ Programming with Segue
∗ Dynamic design through coding
∗ Views and its Co-ordinates
∗ Core animations
∗ Picture pickers
∗ Sound manager
∗ Address book picker

4. Programming with Segue
Segue in Storyboarding

5. Programming with Segue
What is Segue?

6. Programming with Segue
Life Cycle of Segue
∗ Your app never creates segue objects directly, they are always created on
your behalf by iOS when a segue is triggered.
∗ The destination controller is created and initialized.
∗ The segue object is created and its initWithIdentifier:source:destination:
method is called. The identifier is the unique string you provided for the
segue in Interface Builder, and the two other parameters represent the
two controller objects in the transition.
∗ The source view controller’s prepareForSegue:sender: method is called.
∗ The segue object’s perform method is called. This method performs a
transition to bring the destination view controller on-screen.
∗ The reference to the segue object is released, causing it to be
deallocated.

7. Programming with Segue
Triggering a segue programmatically
- (void)orientationChanged:(NSNotification *)notification
{
UIDeviceOrientation deviceOrientation =
[UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
!isShowingLandscapeView)
{
[self performSegueWithIdentifier:@"DisplayAlternateView" sender:self];
isShowingLandscapeView = YES;
}
}

8. Dynamic design through coding
UIView's frame: The CGPoint: The CGSize :
struct CGRect struct CGPoint struct CGSize
{ CGPoint origin; { CGFloat x; CGFloat { CGFloat width;
CGSize size; }; y; }; CGFloat height; };
[button setFrame:CGRectMake(x, y, width, height)];

9. Dynamic design through coding

10. Dynamic design through coding
∗ Creating UI Object on the fly
UIImageView* campFireView = [[UIImageView alloc]
initWithFrame: self.view.frame];
campFireView.image = [UIImage
imageWithName:@"image.png"];
∗ Adding to view
[self.view addSubview: campFireView];

11. Core animations
∗ View Based Animation
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.8];
//animation logic here
[UIView commitAnimations];
∗ Set animation complete callback
[UIView setAnimationDidStopSelector:
@selector(onAnimationComplete:finished:context:)];
∗ onAnimationComplete – Callback
- (void)onAnimationComplete:(NSString *)animationID finished:
(NSNumber *)finished context:(void *)context

12. Core animations
∗ Image Based Animation
∗ create the view that will execute our animation
UIImageView* campFireView = [[UIImageView alloc]
initWithFrame:self.view.frame];
∗ load all the frames of our animation
campFireView.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:@"campFire01.gif"],
[UIImage imageNamed:@"campFire02.gif"], nil];
campFireView.animationDuration = 1.75;
∗ repeat the annimation forever
campFireView.animationRepeatCount = 0;
∗ start animating
[campFireView startAnimating];
∗ add the animation view to the main window
[self.view addSubview:campFireView];

13. Picture pickers
Initialization..
∗ Initialize the Image Picker and set delegate for interaction
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
∗ Checking and setting Source type
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
} else{
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}
∗ Call the picker to front
[self presentViewController:picker animated:YES completion:NULL];

14. Picture pickers
Grabbing the image
∗ If the user cancels we just dismiss the picker and release the object
- (void)imagePickerControllerDidCancel:(UIImagePickerController *) Picker
{
[[picker presentingViewController] dismissViewControllerAnimated:YES
completion:NULL];
}
∗ But if the user selects an image or takes a photo with the camera
(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info{
{
selectedImage.image = [info
objectForKey:UIImagePickerControllerOriginalImage];
[[picker presentingViewController] dismissViewControllerAnimated:YES
completion:NULL];
}
∗ For more information

15. Sound manager
∗ Get the main bundle for the app
CFBundleRef mainBundle = CFBundleGetMainBundle ();
∗ Get the URL to the sound file to play
CFURLRef soundFileURLRef;
soundFileURLRef = CFBundleCopyResourceURL ( mainBundle,
CFSTR ("tap"), CFSTR ("aif"), NULL);
∗ Create a system sound object representing the sound file
SystemSoundID soundFileObject;
AudioServicesCreateSystemSoundID (soundFileURLRef,
&soundFileObject);

16. Sound manager
∗ For System Sound Play
AudioServicesPlaySystemSound (soundFileObject);
∗ For Alert Sound Play
AudioServicesPlayAlertSound (soundFileObject);
∗ For Vibrate Play
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

17. Address book picker
∗ Add Framework: AddressBookUI, AddressBook
∗ Add Header File: #import <AddressBookUI/AddressBookUI.h>
∗ Add Protocol : ABPeoplePickerNavigationControllerDelegate
∗ Responding to User Events
∗ peoplePickerNavigationController:shouldContinueAfterSelectingPerson:
∗ peoplePickerNavigationController:shouldContinueAfterSelectingPerson:pro
perty:identifier:
∗ peoplePickerNavigationControllerDidCancel:

18. Address book picker

19. Address book picker

20. Address book picker

21. Address book picker

22. Question?
Thanks