7. Set Up
When you develop apps, you use the iOS SDK and Xcode (Apple’s IDE). Xcode provides
everything you need to create great apps for iPhone, iPod touch, and iPad. It includes
a source editor, a graphical user interface editor, and many other features. Xcode
employs a single window (workspace window), that presents most of the tools you
need to develop apps. The iOS SDK extends the Xcode toolset to include the tools,
compilers, and frameworks you need specifically for iOS.
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8. Language
Objective-C is an elegant object-oriented language that powers all iOS apps. You write
Objective-C code to create your app, and you need to understand this language in
order to use most application frameworks. Although you can use other languages for
development, you can’t build an iOS app without Objective-C.
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12. Frameworks
An app consists of code that you write and frameworks provided by Apple. A framework
contains a library of methods that your app can call. More than one app can access a
framework library at the same time.
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18. Design Patterns
A design pattern solves a common software engineering problem. Patterns are abstract
designs, not code. When you adopt a design, you adapt the general pattern to your
specific needs.
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21. • Frameworks
• Design Patterns
• Human Interface Design
Development
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22. Human Interface Design
It’s not enough to create an app that works. Users expect iOS apps to be intuitive,
interactive, and engaging. Think about the user experience as you design every aspect
of your app, from the features you choose to the way your app responds to a gesture.
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28. App Design
Before you begin writing a line of code, you should make
some critical design decisions:
• Be as specific as possible about your app’s purpose and features
• Choose the kind of data model your app will use
• Decide on UI style for your app (e.g. single view or master-detail)
• Decide your app to be universal (runs on iPad, iPhone, iPod touch)
These and other design decisions help you to construct the
architecture of your app.
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29. • Frameworks
• Design Patterns
• Human Interface Design
• App Design
• App Store
Development
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30. App Store
To make a great app, you need to test it on actual devices throughout the development
process, not just in Simulator. To run an app on iOS-based devices, you need to
register the devices you want to test on, create certificates that authorize developers to
sign an app, and create an app ID to identify the app. Finally, you will do to publish an
app on the App Store.
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41. Introduction
First iOS App introduces Three Ts of iOS app development:
• Tools: How to use Xcode to create and manage a project?
• Technologies: How to create an app that responds to user input?
• Techniques: How to take advantage fundamental design patterns?
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42. Part 1: Getting Started
• Create and Test a New Project
• Anatomy of an Application
• Find Out How an Application Starts Up
• Look at UIApplicationMain Function
• Look at Storyboad File
• Look at Property List File
• Understand View and Window Architecture
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43. Anatomy of an Application
• Compiled code
• Storyboard files
• Resources (images, sounds, strings, etc)
• Info.plist file (application configuration)
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44. • Compiled code
• Your code
• Framework
• Storyboard files
• Resources (images, sounds, strings, etc)
• Info.plist file (application configuration)
Anatomy of an Application
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45. • Compiled code
• Your code
• Framework
• Storyboard files
• UI elements and other objects
• Details about object relationships
• Resources (images, sounds, strings, etc)
• Info.plist file (application configuration)
Anatomy of an Application
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47. Anatomy of an Application
Your Code
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48. Anatomy of an Application
Your Code
Storyboard
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49. Anatomy of an Application
Your Code
Storyboard
Info.plist File
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50. Anatomy of an Application
Your Code
Storyboard
Info.plist File
Framework
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51. Understanding View and Window Architecture
Views and windows present your application’s user interface and handle the interactions
with that interface. UIKit and other system frameworks provide a number of views that
you can use as-is with little or no modification. You can also define custom views for
places where you need to present content differently than the standard views allow.
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52. Part 2: Inspecting View Controller and Its View
• Use Inspector to Examine View Controller
• Open Inspector
• Change View’s Background Color
• Set Background Color of View Controller’s View
• Restore Background Color of View Controller’s View
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54. Part 3: Configuring View
• Understand View Controller Basics
• Add User Interface Elements
• Create an Action for Button
• Create Outlets for Text Field and Label
• Make Text Field’s Delegate Connection
• Test Application
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55. Understand View Controller Basics
View controllers are a vital link between an app’s data and its visual appearance.
Whenever an iOS app displays a user interface, the displayed content is managed by a
view controller or a group of view controllers coordinating with each other. Therefore,
view controllers provide the skeletal framework on which you build your apps.
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56. Understand View Controller Basics
A key part of any view controller’s implementation is to manage the views used to display
its content. It’s very difficult to manage many connections view controllers. Instead, use
Interface Builder to create storyboards. Storyboards make it easier to visualize the
relationships in your app and simplify the effort needed to initialize objects at runtime.
Interface Builder
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57. Understand View Controller Basics
This is “Hello World” window with its target screen and content views. On the left, you
can see the objects that make up this interface and understand how they are
connected to each other.
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58. Add User Interface Elements
You add user interface (UI) elements by dragging them from the object library to a view
on the canvas. After adding UI elements, you can move and resize them.
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59. Create an Action for Button
Control-drag, press and hold the Control key while you drag from the button to the
implementation file in the assistant editor pane. After that, you must input as following:
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60. Create Outlet for Text Field
Control-drag, press and hold the Control key while you drag from the text field to the
implementation file in the assistant editor pane. After that, you must input as following:
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61. Create Outlet for Label
Control-drag, press and hold the Control key while you drag from the label to the
implementation file in the assistant editor pane. After that, you must input as following:
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62. Make Text Field’s Delegate Connection
Control-drag, press and hold the Control key while you drag from text field to the
yellow sphere in the scene dock. After that, you must input as following:
Control-drag and
select delegate
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64. Part 4: Implementing View Controller
• Add a Property for User’s Name
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65. Part 4: Implementing View Controller
• Add a Property for User’s Name
@property (copy, nonatomic) NSString *userName;
In HelloWorldViewController.h, type:
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66. Part 4: Implementing View Controller
• Add a Property for User’s Name
• Implement changeGreeting: Method
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68. Part 4: Implementing View Controller
• Add a Property for User’s Name
• Implement changeGreeting: Method
• Configure View Controller as Text Field’s Delegate
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69. Part 4: Implementing View Controller
• Add a Property for User’s Name
• Implement changeGreeting: Method
• Configure View Controller as Text Field’s Delegate
- (BOOL) textFieldShouldReturn: (UITextField *)theTextField
{
if (theTextField == self.textField)
{
[theTextField resignFirstResponder];
}
return YES;
}
@end
In HelloWorldViewController.m, type:
In HelloWorldViewController.h, add <UITextFieldDelegate>:
@interface HelloWorldViewController : UIViewController <UITextFieldDelegate>
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70. Part 4: Implementing View Controller
• Add a Property for User’s Name
• Implement changeGreeting: Method
• Configure View Controller as Text Field’s Delegate
• Run Application
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73. many thanks
to
Thank you
lamvt@fpt.com.vn
please
say
Stanford University
https://developer.apple.com
Developer Center
http://www.stanford.edu/class/cs193p
xin
chào
References
http://az4you.wordpress.com
http://www.slideshare.net/vutlam9083/building-a-completed-
iphone-app
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