iOS Training Session-3

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

Agendas

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

Programming with Segue
Segue in Storyboarding

What is 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.


Triggering a segue programmatically
- (void)orientationChanged:(NSNotification *)notification
{
UIDeviceOrientation deviceOrientation =
[UIDevice currentDevice].orientation;

if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
!isShowingLandscapeView)

{
[self performSegueWithIdentifier:@"DisplayAlternateView" sender:self];
isShowingLandscapeView = YES;
}
}

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)];

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];

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

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];

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];

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

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);

Sound manager

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

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:

iOS Training Session-3

More Related Content

What's hot (20)

Viewers also liked (20)

Similar to iOS Training Session-3 (20)

iOS Training Session-3