UITableViewDataSource protocol, uitableview

UITableViewDataSource protocol, uitableview

Preface:

In iOS development, table view UITableView is an important view for UI design.

What protocols do you need to comply with when using Table view UITableView?

 

<UITableViewDataSource,UITableViewDelegate>

UITableViewDataSource table View data source protocol, used to control the display content of the table view;

The UITableViewDelegate table view protocol is used to control the display of the table view, the height of each cell, and the head and end height of each partition;

This document describes the UITableViewDataSource protocol.

What are the methods for UITableViewDataSource protocol?


First, you must implement the following methods:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;

This method is used to set the number of rows in each group of tableView;

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;

This method is used to return the cell, that is, to control the content returned by each row;

The preceding two methods must be implemented;

 

What about other options?

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView; 

Set Several partitions in tableView. If this parameter is not specified, the default value is 1;

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section;  

Set the content of the partition header. The returned value is of the NSString type;

- (NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section;

Similarly, this method sets the content at the end of the partition. The returned value is of the NSString type;

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath;

This method is used to control whether the Cell can be edited. If it is not implemented, all rows are considered editable;

- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath;

This method is used to control whether the Cell can be moved. Only after implementation can the Cell be moved;

 

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView;  

Returns the title of each partition;

- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index;

Tell tableView which row corresponds to which group title;

 

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath;

Save the changes when the cell is edited;

 

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;

 

Cell exchange based on the number of rows;

 

The above is the method of all UITableViewDataSource protocols;