iOS Development UITableView Basic Usage Summary 1

<span id="Label3"></p><p><p><strong>UITableView Basic Use Method</strong></p></p><p><p>1. first, the controller needs to implement two delegate, namely Uitableviewdelegate and Uitableviewdatasource</p></p><p><p>2. Then the delegate of the UITableView object to be set to Self.</p></p><p><p>3. Then you can implement some of these delegate to Pull.</p></p><p><p><strong>(1)-(nsinteger) numberofsectionsintableview: (uitableview *) tableView;</strong></p></p><p><p>This method returns the number of sections that TableView has</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt"><span class="comment">Returns the number of sections</span></li> <li>-(nsinteger) numberofsectionsintableview: (uitableview *) TableView</li> <li class="alt">{</li> <li><span class="keyword">Return 1;</span></li> <li class="alt">}</li> </ol> </ol><p><p><strong>(2)-(nsinteger) tableView: (uitableview *) table numberofrowsinsection: (nsinteger) section;</strong></p></p><p><p>This method returns the number of elements in the corresponding section, which is the number of Rows.</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(nsinteger) tableView: (uitableview *) tableView numberofrowsinsection: (nsinteger) section</li> <li>{</li> <li class="alt"><span class="keyword">Return 10;</span></li> <li>}</li> </ol> </ol><p align="left"><p align="left"><strong>(3)-(cgfloat) tableView: (uitableview *) tableView heightforrowatindexpath: (nsindexpath*) indexpath;</strong></p></p><p><p>This method returns the height of the specified row.</p></p><p><p>-(cgfloat) tableView: (uitableview *) tableView heightforheaderinsection: (nsinteger) section;</p></p><p><p>This method returns the height of the header view for the specified Section.</p></p><p><p>-(cgfloat) tableView: (uitableview *) tableView heightforfooterinsection: (nsinteger) section;</p></p><p><p>This method returns the height of the footer view for the specified Section.</p></p> <ol class="dp-cpp"> <li class="alt"><li class="alt">-(uitableviewcell *) tableView: (uitableview *) tableView cellforrowatindexpath: (nsindexpath *) Indexpath</li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">Static NSString * Showuserinfocellidentifier = @<span class="string">"showuserinfocell"; </span></span></li></li> <li><li>UITableViewCell * cell = [tableview_ dequeuereusablecellwithidentifier:showuserinfocellidentifier];</li></li> <li class="alt"><li class="alt"><span class="keyword">if (cell = = Nil)</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="comment">Create a cell to the display an Ingredient.</span></li></li> <li><li>Cell = [[[uitableviewcell alloc] initwithstyle:uitableviewcellstylesubtitle</li></li> <li class="alt"><li class="alt">reuseidentifier:showuserinfocellidentifier]</li></li> <li><li>autorelease];</li></li> <li class="alt"><li class="alt">}</li></li> <li><li></li></li> <li class="alt"><li class="alt"><span class="comment">Configure the Cell.</span></li></li> <li><li>[email protected]  <span class="string">"signature"; </span></li></li> <li class="alt"><li class="alt">Cell.detailTextLabel.text = [nsstring stringWithCString:userInfo.user_signature.c_str () encoding: nsutf8stringencoding];</li></li> <li><li>}</li></li> </ol><p><p><strong>(5)-(cgfloat) tableView: (uitableview *) tableView heightforheaderinsection: (nsinteger) section</strong></p></p><p><p>Returns the height of the header of the specified section</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(cgfloat) tableView: (uitableview *) tableView heightforheaderinsection: (nsinteger) section</li> <li>{</li> <li class="alt"><span class="keyword">If (section ==0)</span></li> <li><span class="keyword">Return 80.0f;</span></li> <li class="alt"><span class="keyword">Else</span></li> <li><span class="keyword">Return 30.0f;</span></li> <li class="alt">}</li> </ol> </ol><p><p><strong>(6)-(nsstring *) tableView: (uitableview *) tableView titleforheaderinsection: (nsinteger) section</strong></p></p><p><p>Returns the title of the header of the specified section, and if the section header has a return view, the title will not Work.</p></p> <ol class="dp-cpp"> <li class="alt"><li class="alt">-(nsstring *) tableView: (uitableview *) tableView titleforheaderinsection: (nsinteger) section</li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">if (tableView = = Tableview_)</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">if (section = = 0)</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">return @<span class="string">"title 1"; </span></span></li></li> <li><li>}</li></li> <li class="alt"><li class="alt"><span class="keyword">else <span class="keyword">if (section = = 1)</span></span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">return @<span class="string">"title 2"; </span></span></li></li> <li><li>}</li></li> <li class="alt"><li class="alt"><span class="keyword">Else</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">Return nil;</span></li></li> <li><li>}</li></li> <li class="alt"><li class="alt">}</li></li> <li><li><span class="keyword">Else</span></li></li> <li class="alt"><li class="alt">{</li></li> <li><li><span class="keyword">Return nil;</span></li></li> <li class="alt"><li class="alt">}</li></li> <li><li>}</li></li> </ol><p><p><strong>(7)-(UIView *) tableView: (uitableview *) tableView viewforheaderinsection: (nsinteger) section</strong></p></p><p><p>Returns the view of the specified section header, and if not, the function can not return the view</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(UIView *) tableView: (uitableview *) tableView viewforheaderinsection: (nsinteger) section</li> <li>{</li> <li class="alt"><span class="keyword">if (section = = 0)</span></li> <li>{</li> <li class="alt"></li> <li>uiview* Header = [[[nsbundle mainbundle] loadnibnamed: @<span class="string">"settingheaderview"</span></li> <li class="alt">Owner:self</li> <li>options:nil] lastobject];</li> <li class="alt"></li> <li><span class="keyword">Else</span></li> <li class="alt">{</li> <li><span class="keyword">Return nil;</span></li> <li class="alt">}</li> <li>}</li> </ol> </ol><p><p><strong>(8)-(void) tableView: (uitableview *) tableView didselectrowatindexpath: (nsindexpath *) Indexpath</strong></p></p><p><p>When the user selects a cell in a row, the callback uses This. But first, you must set a property of TableView to select Only.</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">tableview.allowsselection=yes;</li> </ol> </ol> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">cell.selectionstyle=uitableviewcellselectionstyleblue;</li> </ol> </ol><p><p>If you do not want to respond to select, you can set the property with the following code:</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">tableview.allowsselection=no;</li> </ol> </ol><p><p>Here is the response to the select click function, according to which section, which row will respond to ITSELF.</p></p> <ol class="dp-cpp"> <li class="alt"><li class="alt">-(<span class="keyword">void) tableView: (uitableview *) tableView didselectrowatindexpath: (nsindexpath *) indexpath</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">if (indexpath.section = = 1)</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">Return</span></li></li> <li><li>}</li></li> <li class="alt"><li class="alt"><span class="keyword">else <span class="keyword">if (indexpath.section==0)</span></span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="keyword">Switch (indexpath.row)</span></li></li> <li><li>{</li></li> <li class="alt"><li class="alt"><span class="comment">Chat</span></li></li> <li><li><span class="keyword">Case 0:</span></li></li> <li class="alt"><li class="alt">{</li></li> <li><li>[self ontalktofriendbtn];</li></li> <li class="alt"><li class="alt">}</li></li> <li><li><span class="keyword">Break</span></li></li> <li class="alt"><li class="alt"></li></li> <li><li><span class="keyword">Default</span></li></li> <li class="alt"><li class="alt"><span class="keyword">Break</span></li></li> <li><li>}</li></li> <li class="alt"><li class="alt">}</li></li> <li><li><span class="keyword">Else</span></li></li> <li class="alt"><li class="alt">{</li></li> <li><li><span class="keyword">return;</span></li></li> <li class="alt"><li class="alt">}</li></li> <li><li></li></li> <li class="alt"><li class="alt">}</li></li> </ol><p><p>How to allow the cell to respond to select, but the selected color does not change, then set</p></p><p><p>Cell.selectionstyle = uitableviewcellselectionstylenone;</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(uitableviewcell *) tableView: (uitableview *) tableView cellforrowatindexpath: (nsindexpath *) Indexpath</li> <li>｛</li> <li class="alt"><span class="comment">The color of the cell is not changed after it is selected</span></li> <li>Cell.selectionstyle = uitableviewcellselectionstylenone;</li> <li class="alt">｝</li> </ol> </ol><p><p><strong>(9) How to set the split line between each line of TableView</strong></p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">self.tableview.separatorstyle=uitableviewcellseparatorstylesingleline;</li> </ol> </ol><p><p>If you do not need to split the line, then set the property to Uitableviewcellseparatorstylenone.</p></p><p><p><strong>(10) How to set the background color of TableView cell</strong></p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(uitableviewcell *) tableView: (uitableview *) tableView cellforrowatindexpath: (nsindexpath *) Indexpath</li> <li>｛</li> <li class="alt"><span class="comment">Set Background color</span></li> <li>Cell.contentview.backgroundcolor=[uicolor colorwithred:0.957 green:0.957 blue:0.957 alpha:1];</li> <li class="alt">｝</li> </ol> </ol><p><p><strong>(one)-(void) tableView: (uitableview *) tableView accessorybuttontappedforrowwithindexpath: (nsindexpath *) Indexpath</strong></p></p><p><p>This function responds, the user clicks the arrow to the right of the cell (if Any)</p></p><p><p><strong>(12) How to set TableView can be edited</strong></p></p><p><p>The first step is to enter edit Mode:</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">[TableView Setediting:yes animated:yes];</li> </ol> </ol><p><p>If you want to exit edit mode, it must be set to No</p></p><p><p>-(uitableviewcelleditingstyle) tableView: (uitableview *) tableView editingstyleforrowatindexpath: (nsindexpath *) Indexpath</p></p><p><p>Returns the type of edit the current cell is performing, and the following code returns the Delete mode</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(uitableviewcelleditingstyle) tableView: (uitableview *) tableView editingstyleforrowatindexpath: (nsindexpath *) Indexpath</li> <li>{</li> <li class="alt"><span class="keyword">Return uitableviewcelleditingstyledelete;</span></li> <li>}</li> </ol> </ol><p><p>-(void) tableView: (uitableview *) Atableview</p></p><p><p>Commiteditingstyle: (uitableviewcelleditingstyle) Editingstyle</p></p><p><p>Forrowatindexpath: (nsindexpath *) Indexpath</p></p><p><p>The notification tells the user which cell has been edited, and for the above code, we perform the Delete cell operation inside the Function.</p></p> <ol class="dp-cpp"> <ol class="dp-cpp"> <li class="alt">-(<span class="keyword">void) tableView: (uitableview *) atableview</span></li> <li>Commiteditingstyle: (uitableviewcelleditingstyle) Editingstyle</li> <li class="alt">Forrowatindexpath: (nsindexpath *) Indexpath</li> <li>｛</li> <li class="alt">[chatarray removeObjectAtIndex:indexPath.row];</li> <li>[chattableview reloaddata];</li> <li class="alt">｝</li> </ol> </ol><p><p><strong>(13) How to get a Cell object for a row</strong></p></p><p><p>-(uitableviewcell *) cellforrowatindexpath: (nsindexpath *) indexpath;</p></p><p><p>iOS Development UITableView Basic Usage Summary 1</p></p></span>