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    Head First iPhone and iPad Development
    Dedication
    A Note Regarding Supplemental Files
    Advance Praise for Head First iPhone and iPad Development
    Praise for other Head First books
     
    How to use this Book: Intro
    1. Getting Started: Going Mobile with iOS
    2. iOS App Patterns: Hello, Renee!
    First, we need to figure out what Mike (really) wants
    App design rules—the iOS HIG
    HIG guidelines for pickers and buttons
    Create a new View-based project for InstaEmail
    The life of a root view
    We need data
    Use pickers when you want controlled input
    Pickers get their data from a datasource...
    That pattern is back
    First, declare that the controller conforms to both protocols
    The datasource protocol has two required methods
    Connect the datasource just like actions and outlets
    There’s just one method for the delegate protocol
    Actions, outlets, and events
    Connect the event to the action
    Add the IBOutlet and property to your view controller
    Next, synthesize the property...
    Connect the picker to our outlet
    Use your picker reference to pull the selected values
    Your iOS Toolbox
    3. Objective-C for iOS: Email needs variety
    4. Multiple Views: A table with a view
    5. Plists and Modal Views: Refining your app
    6. Saving, Editing, and Sorting Data: Everyone’s an editor...
    7. Migrating to iPad: We need more room
    8. Tab Bars and Core Data: Enterprise apps
    9. Migrating and Optimizing with Core Data: Things are changing
    10. Camera, Map Kit, and Core Location: Proof in the real world
    11. iPad UI: Natural interfaces
    A. Leftovers: The top 4 things (we didn’t cover)
    B. Preparing an App for Distribution: Get ready for the App Store
    Index
    About the Authors
    Copyright
    • Create BookmarkCreate Bookmark
    • Create Note or TagCreate Note or Tag
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    2. iOS App Patterns: Hello, Renee! > Connect the datasource just like actions a...

    Connect the datasource just like actions and outlets

    Now that the datasource protocol is implemented, the data is in place and it’s just a matter of linking it to the picker. Hop back into Interface Builder to make that connection:

    image with no caption

    1. Right-click on the Picker in the view to bring up the picker connections box.

    2. Notice that the File’s Owner for this view is our InstaEmailViewController, which realizes the datasource and delegate protocols we need. You need to connect the picker’s dataSource to our controller, or the File’s Owner. To do that, click inside the circle next to the dataSource, and drag over the to File’s Owner.


      

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