OS3 - DevDays Galway - Introduction To iPhone Development

Walkthrough of Building an iPhone App Damian OSuilleabhain OS3

Who Am I?

Who Am I? • Software Developer with 15 Years Experience

Who Am I? • Software Developer with 15 Years Experience • Worked with VB, Java, Classic ASP, JSP, C# and ASP.NET

Who Am I? • Software Developer with 15 Years Experience • Worked with VB, Java, Classic ASP, JSP, C# and ASP.NET • Bought an iPhone in 2008 - A gateway drug!

Who Am I? • Software Developer with 15 Years Experience • Worked with VB, Java, Classic ASP, JSP, C# and ASP.NET • Bought an iPhone in 2008 - A gateway drug! • Shortly thereafter Bought a MacBookPro, learned Objective C and Cocoa

Who Am I? • Software Developer with 15 Years Experience • Worked with VB, Java, Classic ASP, JSP, C# and ASP.NET • Bought an iPhone in 2008 - A gateway drug! • Shortly thereafter Bought a MacBookPro, learned Objective C and Cocoa • Now working as a Full Time Freelance iPhone Developer

Who Am I? • Software Developer with 15 Years Experience • Worked with VB, Java, Classic ASP, JSP, C# and ASP.NET • Bought an iPhone in 2008 - A gateway drug! • Shortly thereafter Bought a MacBookPro, learned Objective C and Cocoa • Now working as a Full Time Freelance iPhone Developer • 3 of My Own Apps on the App Store, 2 for Clients, More in development

Who Am I? • Software Developer with 15 Years Experience • Worked with VB, Java, Classic ASP, JSP, C# and ASP.NET • Bought an iPhone in 2008 - A gateway drug! • Shortly thereafter Bought a MacBookPro, learned Objective C and Cocoa • Now working as a Full Time Freelance iPhone Developer • 3 of My Own Apps on the App Store, 2 for Clients, More in development • Interested in collaborations or projects

Goal For This Session

Goal For This Session • A Walkthrough of Building a Simple iPhone Application

Goal For This Session • A Walkthrough of Building a Simple iPhone Application • Apply the Knowledge Gained in the Introduction to Objective-C

Goal For This Session • A Walkthrough of Building a Simple iPhone Application • Apply the Knowledge Gained in the Introduction to Objective-C • Give you a Grounding in the Fundamentals of an iPhone Application

What Will We Build?

What Will We Build? • “Epic Tweets”

What Will We Build? • “Epic Tweets” • A simple Twitter client

What Will We Build? • “Epic Tweets” • A simple Twitter client • Shows the public timeline

What Will We Build? • “Epic Tweets” • A simple Twitter client • Shows the public timeline • Demonstrates the principles discussed

Epic Tweets

What Will Be Covered

What Will Be Covered • Developer Tools

What Will Be Covered • Developer Tools • Design Patterns

What Will Be Covered • Developer Tools • Design Patterns • Project Structure

What Will Be Covered • Developer Tools • Design Patterns • Project Structure • Visually Design Your Application's Interface

What Will Be Covered • Developer Tools • Design Patterns • Project Structure • Visually Design Your Application's Interface • Responding to User Input

What Will Be Covered • Developer Tools • Design Patterns • Project Structure • Visually Design Your Application's Interface • Responding to User Input • Connecting the Interface to Your Code

What Will Be Covered • Developer Tools • Design Patterns • Project Structure • Visually Design Your Application's Interface • Responding to User Input • Connecting the Interface to Your Code • What We Have Not Covered

What Will Be Covered • Developer Tools • Design Patterns • Project Structure • Visually Design Your Application's Interface • Responding to User Input • Connecting the Interface to Your Code • What We Have Not Covered • Questions

Developer Tools

Developer Tools • Xcode

Developer Tools • Xcode • Interface Builder

Developer Tools • Xcode • Interface Builder • Simulator

Developer Tools • Xcode • Interface Builder • Simulator • Instruments

Developer Tools - Xcode

Developer Tools - Xcode • Xcode is an integrated development environment (IDE) that provides all of the tools you need to;

Developer Tools - Xcode • Xcode is an integrated development environment (IDE) that provides all of the tools you need to; • create and manage your iPhone projects and source ﬁles,

Developer Tools - Xcode • Xcode is an integrated development environment (IDE) that provides all of the tools you need to; • create and manage your iPhone projects and source ﬁles, • build your code into an executable, and

Developer Tools - Xcode • Xcode is an integrated development environment (IDE) that provides all of the tools you need to; • create and manage your iPhone projects and source ﬁles, • build your code into an executable, and • run and debug your code either in iPhone simulator or on a device.

Developer Tools - Interface Builder

Developer Tools - Interface Builder • Interface Builder is the tool you use to assemble your application’s user interface visually.

Developer Tools - Interface Builder • Interface Builder is the tool you use to assemble your application’s user interface visually. • Using Interface Builder, you assemble your application’s window by dragging and dropping preconﬁgured components onto it.

Developer Tools - Simulator

Developer Tools - Simulator • The iPhone simulation environment lets you build and run your iPhone application on your computer

Developer Tools - Simulator • The iPhone simulation environment lets you build and run your iPhone application on your computer • Presents the iPhone user interface in a window on your computer

Developer Tools - Simulator • The iPhone simulation environment lets you build and run your iPhone application on your computer • Presents the iPhone user interface in a window on your computer • Lets you simulate most of the actions a user performs on their device

Developer Tools - Simulator • The iPhone simulation environment lets you build and run your iPhone application on your computer • Presents the iPhone user interface in a window on your computer • Lets you simulate most of the actions a user performs on their device • Important to note a simulator, not an emulator. Does not give a realistic view of memory or processor performance

Developer Tools - Instruments

Developer Tools - Instruments • The Instruments environment lets you analyse the performance of your iPhone applications while running in the simulator or on a device.

Developer Tools - Instruments • The Instruments environment lets you analyse the performance of your iPhone applications while running in the simulator or on a device. • You can gather data about your application’s memory usage, disk activity, network activity, and graphics performance.

Design Patterns

Design Patterns • Delegation

Design Patterns • Delegation • Model View Controller

Design Patterns • Delegation • Model View Controller • Target-Action

Design Patterns - Delegation

Design Patterns - Delegation • The delegation design pattern is a way of modifying complex objects without subclassing them.

Design Patterns - Delegation • The delegation design pattern is a way of modifying complex objects without subclassing them. • Instead of subclassing, you use the complex object as is and put any custom code for modifying the behaviour of that object inside a separate object, which is referred to as the delegate object.

Design Patterns - Delegation • The delegation design pattern is a way of modifying complex objects without subclassing them. • Instead of subclassing, you use the complex object as is and put any custom code for modifying the behaviour of that object inside a separate object, which is referred to as the delegate object. • At pre-deﬁned times, the complex object then calls the methods of the delegate object to give it a chance to run its custom code.

Design Patterns - MVC

Design Patterns - MVC • The Model-View-Controller (MVC) design pattern is a way of dividing your code into independent functional areas.

Design Patterns - MVC • The Model-View-Controller (MVC) design pattern is a way of dividing your code into independent functional areas. • The model portion deﬁnes your application’s underlying data engine and is responsible for maintaining the integrity of that data.

Design Patterns - MVC • The Model-View-Controller (MVC) design pattern is a way of dividing your code into independent functional areas. • The model portion deﬁnes your application’s underlying data engine and is responsible for maintaining the integrity of that data. • The view portion deﬁnes the user interface for your application and has no explicit knowledge of the origin of data displayed in that interface.

Design Patterns - MVC • The Model-View-Controller (MVC) design pattern is a way of dividing your code into independent functional areas. • The model portion deﬁnes your application’s underlying data engine and is responsible for maintaining the integrity of that data. • The view portion deﬁnes the user interface for your application and has no explicit knowledge of the origin of data displayed in that interface. • The controller portion acts as a bridge between the model and view and facilitates updates between them.

Design Patterns - Target-Action

Design Patterns - Target-Action • Controls use the target-action design pattern to notify your application of user interactions.

Design Patterns - Target-Action • Controls use the target-action design pattern to notify your application of user interactions. • When the user interacts with a control in a predeﬁned way (such as by tapping a button), the control sends a message (the action) to an object you specify (the target).

Design Patterns - Target-Action • Controls use the target-action design pattern to notify your application of user interactions. • When the user interacts with a control in a predeﬁned way (such as by tapping a button), the control sends a message (the action) to an object you specify (the target). • Upon receiving the action message, the target object can then respond in an appropriate manner (such as by updating application state in response to the button push).

Project Structure

Project Structure • Class Files

Project Structure • Class Files • Deﬁnitions (*.h)

Project Structure • Class Files • Deﬁnitions (*.h) • Implementations (*.m)

Project Structure • Class Files • Deﬁnitions (*.h) • Implementations (*.m) • Resources

Project Structure • Class Files • Deﬁnitions (*.h) • Implementations (*.m) • Resources • Property Lists (*.plist)

Project Structure • Class Files • Deﬁnitions (*.h) • Implementations (*.m) • Resources • Property Lists (*.plist) • Interface Files (*.xib)

Project Structure • Class Files • Deﬁnitions (*.h) • Implementations (*.m) • Resources • Property Lists (*.plist) • Interface Files (*.xib) • Images, audio etc.

The Code Demo

The Code Demo • Visually Design Your Application's Interface

The Code Demo • Visually Design Your Application's Interface • Connect the Interface With Your Code

The Code Demo • Visually Design Your Application's Interface • Connect the Interface With Your Code • Responding To User Input

What We Have Not Covered

What We Have Not Covered • Non Technical

What We Have Not Covered • Non Technical • Getting Set-up with Digital Certiﬁcates

What We Have Not Covered • Non Technical • Getting Set-up with Digital Certiﬁcates • App Store Submission Process

What We Have Not Covered • Non Technical • Getting Set-up with Digital Certiﬁcates • App Store Submission Process • Technical

What We Have Not Covered • Non Technical • Getting Set-up with Digital Certiﬁcates • App Store Submission Process • Technical • Details of the XML Parser

Questions

Questions • Any Questions on Anything We Have Covered?

Contact Details

Contact Details • Email: damian@os3.ie

Contact Details • Email: damian@os3.ie • Twitter: @DamianOS3

Contact Details • Email: damian@os3.ie • Twitter: @DamianOS3 • Web: http://os3.ie

Contact Details • Email: damian@os3.ie • Twitter: @DamianOS3 • Web: http://os3.ie • Happy to answer any questions you have on iPhone development

Contact Details • Email: damian@os3.ie • Twitter: @DamianOS3 • Web: http://os3.ie • Happy to answer any questions you have on iPhone development • Even happier to discuss any projects you would like me to do!

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OS3 - DevDays Galway - Introduction To iPhone Development

by Damian OSuilleabhain on Dec 01, 2009

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OS3 - DevDays Galway - Introduction To iPhone Development — Presentation Transcript