原汁原味的才有感觉!所以我觉得没有必要翻译啦.
谈到UITableViewDelegate不得不先从UITableViewDataSource说起
The UITableViewDataSource protocol is adopted by an object that
mediates the application’�s data model for a UITableView object. The
data source provides the table-view object with the information it needs
to construct and modify a table view.
Overview
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 the UITableView 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.
- tableView:cellForRowAtIndexPath:
Required. Asks the data source for a cell to insert in a particular location of the table view.
- numberOfSectionsInTableView:
Asks the data source to return the number of sections in the table view.
- tableView:numberOfRowsInSection:
Required. Tells the data source to return the number of rows in a given section of a table view.
- sectionIndexTitlesForTableView:
Asks the data source to return the titles for the sections for a table view.
- tableView:sectionForSectionIndexTitle:atIndex:
Asks the data source to return the index of the section having the given title and section title index.
- tableView:titleForHeaderInSection:
Asks the data source for the title of the header of the specified section of the table view.
- tableView:titleForFooterInSection:
Asks the data source for the title of the footer of the specified section of the table view.
Inserting or Deleting Table Rows
- tableView:commitEditingStyle:forRowAtIndexPath:
Asks the data source to commit the insertion or deletion of a specified row in the receiver.
- tableView:canEditRowAtIndexPath:
Asks the data source to verify that the given row is editable.
Reordering Table Rows
- tableView:canMoveRowAtIndexPath:
Asks the data source whether a given row can be moved to another location in the table view.
- tableView:moveRowAtIndexPath:toIndexPath:
Tells the data source to move a row at a specific location in the table view to another location.
现在我们开始了解UITableViewDelegateO(∩_∩)O
UITableViewDelegate:The delegate of a UITableView object must adopt the UITableViewDelegate protocol. Optional methods of the protocol allow the delegate to manage selections, configure section headings and footers, help to delete and reorder cells, and perform other actions.
Overview:Many methods of the UITableViewDelegate protocol take NSIndexPath objects as parameters and return values. UIKit declares a category on NSIndexPath that 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: method). Because rows are located within their sections, you usually must evaluate the section index number before you can identify the row by its index number.
Symbols
1. Configuring Rows for the Table View
- tableView:heightForRowAtIndexPath:
Asks the delegate for the height to use for a row in a specified location.
- tableView:estimatedHeightForRowAtIndexPath:
Asks the delegate for the estimated height of a row in a specified location.
- tableView:indentationLevelForRowAtIndexPath:
Asks the delegate to return the level of indentation for a row in a given section.
- tableView:willDisplayCell:forRowAtIndexPath:
Tells the delegate the table view is about to draw a cell for a particular row.
2.Managing Accessory Views
- tableView:editActionsForRowAtIndexPath:
Asks the delegate for the actions to display in response to a swipe in the specified row.
- tableView:accessoryTypeForRowWithIndexPath:
Asks the delegate for the type of standard accessory view to use as a disclosure control for the specified row.
Deprecated
- tableView:accessoryButtonTappedForRowWithIndexPath:
Tells the delegate that the user tapped the accessory (disclosure) view associated with a given row.
3.Managing Selections
- tableView:willSelectRowAtIndexPath:
Tells the delegate that a specified row is about to be selected.
- tableView:didSelectRowAtIndexPath:
Tells the delegate that the specified row is now selected.
- tableView:willDeselectRowAtIndexPath:
Tells the delegate that a specified row is about to be deselected.
- tableView:didDeselectRowAtIndexPath:
Tells the delegate that the specified row is now deselected.
4.Modifying the Header and Footer of Sections
- tableView:viewForHeaderInSection:
Asks the delegate for a view object to display in the header of the specified section of the table view.
- tableView:viewForFooterInSection:
Asks the delegate for a view object to display in the footer of the specified section of the table view.
- tableView:heightForHeaderInSection:
Asks the delegate for the height to use for the header of a particular section.
- tableView:estimatedHeightForHeaderInSection:
Asks the delegate for the estimated height of the header of a particular section.
- tableView:heightForFooterInSection:
Asks the delegate for the height to use for the footer of a particular section.
- tableView:estimatedHeightForFooterInSection:
Asks the delegate for the estimated height of the footer of a particular section.
- tableView:willDisplayHeaderView:forSection:
Tells the delegate that a header view is about to be displayed for the specified section.
- tableView:willDisplayFooterView:forSection:
Tells the delegate that a footer view is about to be displayed for the specified section.
5.Editing Table Rows
- tableView:willBeginEditingRowAtIndexPath:
Tells the delegate that the table view is about to go into editing mode.
- tableView:didEndEditingRowAtIndexPath:
Tells the delegate that the table view has left editing mode.
- tableView:editingStyleForRowAtIndexPath:
Asks the delegate for the editing style of a row at a particular location in a table view.
- tableView:titleForDeleteConfirmationButtonForRowAtIndexPath:
Changes the default title of the delete-confirmation button.
- tableView:shouldIndentWhileEditingRowAtIndexPath:
Asks the delegate whether the background of the specified row should be indented while the table view is in editing mode.
6.Reordering Table Rows
- tableView:targetIndexPathForMoveFromRowAtIndexPath:toProposedIndexPath:
Asks the delegate to return a new index path to retarget a proposed move of a row.
7.Tracking the Removal of Views
- tableView:didEndDisplayingCell:forRowAtIndexPath:
Tells the delegate that the specified cell was removed from the table.
- tableView:didEndDisplayingHeaderView:forSection:
Tells the delegate that the specified header view was removed from the table.
- tableView:didEndDisplayingFooterView:forSection:
Tells the delegate that the specified footer view was removed from the table.
8.Copying and Pasting Row Content
- tableView:shouldShowMenuForRowAtIndexPath:
Asks the delegate if the editing menu should be shown for a certain row.
- tableView:canPerformAction:forRowAtIndexPath:withSender:
Asks the delegate if the editing menu should omit the Copy or Paste command for a given row.
- tableView:performAction:forRowAtIndexPath:withSender:
Tells the delegate to perform a copy or paste operation on the content of a given row.
9.Managing Table View Highlighting
- tableView:shouldHighlightRowAtIndexPath:
Asks the delegate if the specified row should be highlighted.
- tableView:didHighlightRowAtIndexPath:
Tells the delegate that the specified row was highlighted.
- tableView:didUnhighlightRowAtIndexPath:
Tells the delegate that the highlight was removed from the row at the specified index path.
10.Managing Table View Focus
- tableView:canFocusRowAtIndexPath:
Asks the delegate whether the cell at the specified index path is itself focusable.
- tableView:shouldUpdateFocusInContext:
Asks the delegate whether the focus update specified by the context is allowed to occur.
- tableView:didUpdateFocusInContext:withAnimationCoordinator:
Tells the delegate that a focus update specified by the context has just occurred.
- indexPathForPreferredFocusedViewInTableView:
Asks the delegate for the table view’s index path for the preferred focused view.
