ReadMe.txt
Simple Core Data Relationships |
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The TaggedLocations application illustrates how you can manipulate Core Data attributes and relationships in an iOS application. |
The first screen displays a table view of events, which encapsulate a time stamp, a geographical location expressed in latitude and longitude, and a name for the event. The user can add, remove, and edit events using the first screen. |
Events have a to-many relationship to tags (which have an inverse to-many relationship to events). Tags have a name which describes a feature of an event. Tags are displayed in a second table view; when a tag is related to the selected event, a check mark is displayed in the corresponding row. |
Main Components |
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View Controllers |
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APLEventsTableViewController |
The table view controller responsible for displaying the list of events, supporting additional functionality: |
* Addition of new events |
* Deletion of existing events using UITableView's tableView:commitEditingStyle:forRowAtIndexPath: method |
* Editing an event's name |
APLTagSelectionController |
The table view controller responsible for displaying and editing tags. |
The rows show a check mark if the selected event is related to the corresponding tag. |
Model |
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TaggedLocations.xcdatamodeld |
The Core Data managed object model for the application. |
APLEvent |
A Core Data managed object class to represent an event containing geographical coordinates and a time stamp. |
APLTag |
A Core Data managed object class to represent a tag. |
Table View Cells |
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APLEventTableViewCell |
Table view cell to display information about an event. |
The delegate is the RootViewController table view controller which acts as: |
* The name text field's delegate to respond to editing operations |
* The target of the tag button to initiate tag editing |
APLEditableTableViewCell |
Table view cell to present an editable text field. |
Application configuration |
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APLAppDelegate |
Configures the Core Data stack and passes a managed object context to the first view controller. |
MainStoryboard.storyboard |
Loaded automatically by the application. |
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