This document provides an overview of an intermediate iOS training course covering topics such as protocols and delegates, categories and selectors, views and view controllers, and different types of view controllers. It includes descriptions of core concepts like protocols, delegates, categories, selectors, and various view controller classes like UINavigationController, UITableViewController, UITabBarController, UIPageViewController, and UISplitViewController. The training also involves hands-on examples for creating view controllers, manipulating views, adding content and images, and simple animation.

1. iOS Training
(Intermediate)
Gurpreet Singh
Sriram Viswanathan
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2. Topics
 Protocols and Delegates
 Categories and Selectors
 Views and View Controllers
 Introduction to View Controllers
 Types of View Controllers
 Hands on example for
 Creating a View Controller
 Manipulating Views
 Adding Content to Application
 Working with Images
 Adding Simple Animation
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3. Protocols and Delegates
Protocol
 Protocols declare methods that others are expected to implement
 Similar to interfaces in other languages
 Protocol does not require .m file.
 Protocol can have @optional methods
Delegate
 It allows one object to delegate part of its behavior to be handled by
another object.
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4. Topics
 Protocols and Delegates
 Categories and Selectors
 Views and View Controllers
 Introduction to View Controllers
 Types of View Controllers
 Hands on example for
 Creating a View Controller
 Manipulating Views
 Adding Content to Application
 Working with Images
 Adding Simple Animation
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5. Categories and Selectors
Categories:
 Lets you add methods to class without having access original code
 Access instance variable but can't add new ones
@implementation NSString (NumericComparison)
- (NSComparisonResult) compareNumerically:(NSString *) compareWithString {
// ADD NUMERIC SORTING LOGIC HERE
}
@end
Selectors:
 Selector is a way of specifying a method to call
@selector(methodName)
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6. Topics
 Protocols and Delegates
 Categories and Selectors
 Views and View Controllers
 Introduction to View Controllers
 Types of View Controllers
 Hands on example for
 Creating a View Controller
 Manipulating Views
 Adding Content to Application
 Working with Images
 Adding Simple Animation
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7. Introduction to View Controllers
 Link between application’s data and user interface
 View controllers are traditional controller objects in the MVC design
pattern
 Responsible for fetching/initializing models
 Every view controller that Apple provides extends from the
UIViewController class
 You Manage Your Content Using Content View Controllers
 A content view controller presents content on the screen using a view or a
group of views organized into a view hierarchy.
 Container View Controllers Manage Other View Controllers
 A container view controller contains content owned by other view controllers.
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8. Introduction to View Controllers
 Every view is controlled by only one view controller.
 Each view controller interacts with a subset of your app’s data.
 For example, the Photo controller needs to know only the photo to be displayed.
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9. Topics
 Protocols and Delegates
 Categories and Selectors
 Views and View Controllers
 Introduction to View Controllers
 Types of View Controllers
 Hands on example for
 Creating a View Controller
 Manipulating Views
 Adding Content to Application
 Working with Images
 Adding Simple Animation
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10. Types of View Controllers
Most commonly used UI View Controllers
UINavigationController
 Navigation Controllers Manage Stacks of Other View Controllers
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11. Types of View Controllers
UITableViewController
Interesting features:
•
•
Lazy loading
Grouping
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12. Types of View Controllers
UITabBarController
 Tab Bar Controllers Manage Independent Sets of View Controllers
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13. Types of View Controllers
UIPageViewController
 Page View Controllers Manage Paged Display of View Controllers
 Apps can use a page view controller to present a paged view of content
 The page view controller itself manages the display of one or more
content view controllers, each of which provides a single page of content.
UISplitViewController
 Split View Controllers Manage Two Panes of Information
 Apps can use a split view controller to manage two panes of
information, where both portions of the interface are themselves managed
by view controllers.
 This is interface is similar to a navigation controller, but it takes advantage
of the larger screen size of iPad to present more content at a time.
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14. Types of View Controllers
View Controllers at a glance
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15. Topics
 Protocols and Delegates
 Categories and Selectors
 Views and View Controllers
 Introduction to View Controllers
 Types of View Controllers
 Hands on example for
 Creating a View Controller
 Manipulating Views
 Adding Content to Application
 Working with Images
 Adding Simple Animation
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