3. Follow Us #iOS
• Adjunct Professor
• Guest Lecture @ University
• Conference Speaker
• Technical Editor
Bess Ho
@bess
• Book Author
4. Follow Us #iOS
• 10 years in Web designer &
development
• 3 years in Mobile
Bess Ho
• Focus in UI & Architecture
@bess • Background in consumer
behavior & data analytic
• Advising startup at seed &
early stage
6. 93% of Fortune 500 companies
are testing or deploying the
iPhone.
Over 80% of the top hospitals in
the US are testing or piloting
iPads.
92% of the Fortune 500
companies are testing or
deploying iPad. It is unheard of.
11. Requirements
• Intel-based Mac OSX Snow Leopard or Lion
• Update Mac OSX Software 10.6.8 or 10.7
• Apple Developer Account
• Safari (FREE) Mac ($99/yr) iOS ($99/yr)
• iOS4.3 SDK
• Xcode 3 or Xcode 4 ($)
• Requires 5GB+ Download
• Requires 11GB+ Install
Bess.co 2011 Copyright © All rights are reserved
16. Xcode 4
IDE
UI Editor - Interface Builder
Debugger
Source code repository Management
Single “workspace window”
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18. Xcode 4 workspace window
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22. MVC
Model View Controller (MVC) pattern separates
application’s data structures (Model) from user interface
(View) with the connecting layer (Controller)
View Model
Controller
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23. MVC
.xib Data
List of tasks
View Model State of each task
Object containing a table with
cells allowing text entry and
user interaction
Controller
ViewController
Respond to user input or inform
the view to update visual elements
Trigger Model to perform action
to data
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24. Simple App
.xib
Interface Builder
View
Controller
Model
.h & .m
ViewController
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25. Frameworks
UIKit.framework
Foundation.framework
CoreGraphics.framewrk
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26. Frameworks
1) Cocoa Touch
touch and event-driven and interface components
Cocoa Touch
2) Media
Play and record audio; animation for 2D & 3D
Media
3) Core Services
Access lower level features such as files, networking,
Core Services location, in-app purchase
4) Core OS
Core OS Access to memory, file system, lower level networking
and hardware
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29. View Controller
header file implementation file
(.h) (.m)
Declare Execute
• instance variables
• properties
• methods
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30. Debugging
/* This is a comment */
/*
* This is a comment
* Continue into next line(s)
*/
// This is a Comment
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31. Import Directive
helloiphoneViewController.h
Never include more than once
// Include header files
#import <UIKit/UIKit.h>
// Declare class names and its superclasses
@interface helloiphoneViewController : UIViewController
<UITableViewDelegate> {
}
// Declare properties and methods
// Close @interface directive
@end
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32. Interface Directive
helloiphoneViewController.h
Protocol(s) Class Superclass
// Include header files
#import <UIKit/UIKit.h>
// Declare class names and its superclasses
@interface helloiphoneViewController : UIViewController
<UITableViewDelegate> {
}
@end
// Adding Multiple Delegates
<UITableViewDelegate, UIAccelerometerDelegate>
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33. ViewController.h
helloiphoneViewController.h
#import <UIKit/UIKit.h>
@interface helloiphoneViewController : UIViewController {
UILabel *myLabel;
}
@property (nonatomic, retain) IBOutlet UILabel *myLabel;
-void()myMethod;
@end
Property
Instance variables Method
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34. Declare Variable
Declare an UILabel variable named “myLabel”
// Declare UILabel variable
UILabel *myLabel;
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35. Declare Property
1) Declare a property of UILabel object named “myLabel”
2) Assign IBOulet to UILabel object
3) Assign retain and nonatomic to UILabel object
// Declare UILabel variable
@property (nonatomic, retain) IBOutlet UILabel *myLabel;
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36. Declare Method
Declare a method that implementation file is going to use
// Declare a method
-void()myMethod;
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37. ViewController.m
helloiphoneViewController.m
#import directive #import "helloiphoneViewController.h"
@implementation @implementation helloiphoneViewController
section
@synthesize myLabel;
Synthesizing a property - (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
Method Declaration
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
@end directive @end
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38. IBOutlet vs IBAction
UIElements
Interface Builder
add
.xib
UIView
IBActions IBOutlets
Optional Always
ViewController
subclass
Add UI elements to UIView in Interface Builder. You
subclass UIViewController to add functionality. IBOutlets
hook up UIElements in UIView to access them. IBActions
trigger actions based on user gestures on UIView
elements. Bess.co 2011 Copyright © All rights are reserved
40. 320 pixel
480 pixel
iPhone /2011 Copyright © All rights are reserved Size
Bess.co
iTouch Screen
41. 640 pixel
960 pixel
iPhoneCopyright © All rights are reserved
Bess.co 2011
4 Screen Size
42. 768 pixel
1024 pixel
iPad Screen Size
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43. Coding Options
Universal App
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44. Icon.png Icon@2x.png iTunesArtwork
57 x 57 pixel
Icon-72.png 114 x 114 pixel
Icon-Small.png
72 x 72 pixel 29 x 29 pixel 512 x 512 pixel
Icon-Small-50.png Icon-Small@2x.png
50 x 50 pixel 58 x 58 pixel
App Icons reserved
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48. Q&A
Thank you
Find out class schedules
http://bit.ly/iOSClass
http://www.udemy.com/ios-development/
Bess.co 2011 Copyright © All rights are reserved
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