?UITableViewDataSource 官方详解

https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UITableViewDataSource_Protocol/index.html
UITableViewDataSource

IMPORTANT

This is a preliminary document for an API or technology in development. Apple is supplying this information to help you plan for the adoption of the technologies and programming interfaces described herein for use on Apple-branded products. This information is subject to change, and software implemented according to this document should be tested with final operating system software and final documentation. Newer versions of this document may be provided with future betas of the API or technology.

Inherits From

---

Not Applicable

Conforms To

---

Not Applicable

Import Statement

---

OBJECTIVE-C

@import UIKit;

Availability

---

Available in iOS 2.0 and later 

The UITableViewDataSource protocol is adopted by an object that mediates the application’?s data model for aUITableView object. The data source provides the table-view object with the information it needs to construct and modify a table view.

As a representative of the data model, the data source supplies minimal information about the table view’s appearance. The table-view object’s delegate—an object adopting the UITableViewDelegate protocol—provides that information.

The required methods of the protocol provide the cells to be displayed by the table-view as well as inform theUITableView object about the number of sections and the number of rows in each section. The data source may implement optional methods to configure various aspects of the table view and to insert, delete, and reorder rows.

NOTE

To enable the swipe-to-delete feature of table views (wherein a user swipes horizontally across a row to display a Delete button), you must implement the tableView:commitEditingStyle:forRowAtIndexPath:method.

Many methods take NSIndexPath objects as parameters. UITableView declares a category on NSIndexPaththat enables you to get the represented row index (row property) and section index (section property), and to construct an index path from a given row index and section index (indexPathForRow:inSection: class method). (The first index in each index path identifies the section and the next identifies the row.)

Configuring a Table View

• - tableView:cellForRowAtIndexPath: Required
• - numberOfSectionsInTableView:
• - tableView:numberOfRowsInSection: Required
• - sectionIndexTitlesForTableView:
• - tableView:sectionForSectionIndexTitle:atIndex:
• - tableView:titleForHeaderInSection:
• - tableView:titleForFooterInSection:

• 
  

  
  

  
  

  
  

Inserting or Deleting Table Rows

• - tableView:commitEditingStyle:forRowAtIndexPath:
• - tableView:canEditRowAtIndexPath:

• 
  

  
  

  
  

  
  

Reordering Table Rows

• - tableView:canMoveRowAtIndexPath:
• - tableView:moveRowAtIndexPath:toIndexPath:

•