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Building a Completed iPhone App
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Presented by Vu Tran Lam
Building aCompleted iPhone App
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2
Could You Build Apps For This...?
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...And This...?
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L
6
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Set UpWhen 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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LanguageObjective-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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Development
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• Frameworks
Development
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FrameworksAn 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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Using an Object-Oriented Framework
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Handle the Events
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Survey Major Frameworks
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Survey Major Frameworks
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• Frameworks• Design Patterns
Development
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Design PatternsA 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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Design Pattern: Model-View-Controller
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Design Pattern: Model-View-Controller
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• Frameworks• Design Patterns• Human Interface Design
Development
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Human Interface DesignIt’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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Human Interface Design
• Types of App
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Human Interface Design
• Types of App• Wireframing
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Human Interface Design
• Types of App• Wireframing• Icons
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• Frameworks• Design Patterns• Human Interface Design• App Design
Development
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App Design
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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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• Frameworks• Design Patterns• Human Interface Design• App Design• App Store
Development
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App StoreTo 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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Xcode IDE
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Xcode Workspace
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Toolbar Xcode Workspace
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Toolbar
Navigation Selector Bar
Filter Bar
Project Navigator
Xcode Workspace
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Toolbar
Navigation Selector Bar
Filter Bar
Interface Builder
Project Navigator
Xcode Workspace
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Toolbar
Navigation Selector Bar
Jump Bars
Filter Bar
Interface Builder Editor Area
Project Navigator
Xcode Workspace
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Toolbar
Navigation Selector Bar
Library Selector Bar
Filter Bar
Inspector Selector Bar
Interface Builder Editor Area
Inspector Pane
Library Pane
Project Navigator
Jump Bars
Xcode Workspace
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Toolbar
Navigation Selector Bar
Library Selector Bar
Filter Bar
Inspector Selector Bar
Debug Bar
Interface Builder Editor Area
Inspector Pane
Library Pane
Debug Area
Project Navigator
Jump Bars
Xcode Workspace
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Your First iOS App - Hello World
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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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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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Anatomy of an Application
• Compiled code• Storyboard files• Resources (images, sounds, strings, etc)• Info.plist file (application configuration)
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• 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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• 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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Anatomy of an Application
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Anatomy of an Application
Your Code
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Anatomy of an Application
Your Code
Storyboard
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Anatomy of an Application
Your Code
Storyboard
Info.plist File
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Anatomy of an Application
Your Code
Storyboard
Info.plist File
Framework
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Understanding View and Window ArchitectureViews 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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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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Change View’s Background Color
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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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Understand View Controller BasicsView 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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Understand View Controller BasicsA 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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Understand View Controller BasicsThis 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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Add User Interface ElementsYou 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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Create an Action for ButtonControl-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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Create Outlet for Text FieldControl-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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Create Outlet for LabelControl-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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Make Text Field’s Delegate ConnectionControl-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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Test Application
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Part 4: Implementing View Controller
• Add a Property for User’s Name
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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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Part 4: Implementing View Controller
• Add a Property for User’s Name• Implement changeGreeting: Method
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Part 4: Implementing View Controller
• Add a Property for User’s Name• Implement changeGreeting: Method
- (IBAction)changeGreeting:(id)sender{ self.userName = self.textField.text; NSString *nameString = self.userName; if (nameString.length == 0) { nameString = @"World"; }
NSString *greeting = [[NSString alloc] initWithFormat: @"Hello, %@!", nameString]; self.label.text = greeting;}
In HelloWorldViewController.m, type:- (IBAction)changeGreeting:(id)sender{ self.userName = self.textField.text; NSString *nameString = self.userName; if (nameString.length == 0) { nameString = @"World"; }
NSString *greeting = [[NSString alloc] initWithFormat: @"Hello, %@!", nameString]; self.label.text = greeting;}
In HelloWorldViewController.m, type:
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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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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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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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Next...
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MVC
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many thanks to
Thank you
Stanford Universityhttps://developer.apple.com
Developer Center
http://www.stanford.edu/class/cs193p
xin chào
Referenceshttp://az4you.wordpress.comhttp://www.slideshare.net/vutlam9083/building-a-completed-iphone-app
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