iOS Development--ui_swift Chapter &uitableview Implementing cell Expansion and hiding

UITableView implementing cell expansion and hiding
The following is a demo of the collapse spread effect of cell cell. When you click a cell, the cell expands to show some details. Clicking on another cell will turn off the original and animate. The effect is as follows: The code is as follows:

1 Import UIKit2  3 classViewcontroller:uiviewcontroller,uitableviewdelegate,4 Uitableviewdatasource {5      6var tableview:uitableview?7      8var ctrlnames:[string] = ["UILabel Label","UIButton Button","Uidatepiker Date Selector",9         "UITableView Table View"]Ten       Onevar selectedcellindexpath:nsindexpath! A       -     Overridefunc viewdidload () { - super.viewdidload () the           -         //Create a table view -Self.tableview =UITableView (Frame:UIScreen.mainScreen (). Applicationframe, - Style:UITableViewStyle.Plain) +self.tableview!.Delegate= Self -self.tableview!. DataSource = Self +         //to create a reusable cell Aself.tableview!. RegisterClass (Uitableviewcell.self, Forcellreuseidentifier:"Swiftcell") atSelf.view.addSubview (self.tableview!) -     } -       -     //in this case, there is only one partition -Func Numberofsectionsintableview (tableview:uitableview!)Int { -         return 1; in     } -       to     //returns the number of table rows (that is, the number of returned controls) +Func TableView (Tableview:uitableview, numberofrowsinsection section:int)Int { -         returnSelf.ctrlnames.count the     } *       $     //Create individual cell display content (create the cell specified by the parameter Indexpath)Panax Notoginseng func TableView (Tableview:uitableview, Cellforrowatindexpath Indexpath:nsindexpath) --UITableViewCell the     { +var label =UILabel (Frame:cgrectzero) ALabel.settranslatesautoresizingmaskintoconstraints (false) theLabel.text =Self.ctrlnames[indexpath.row] +           -var textview=Uitextview (Frame:cgrectzero) $Textview.settranslatesautoresizingmaskintoconstraints (false) $Textview.textcolor =Uicolor.graycolor () -         //demo effect, temporary write dead -Textview.text ="Uidatepicker is a controller class that encapsulates the uipickerview, but he is a subclass of Uicontrol," the           -Let identify:string ="Swiftcell"Wuyivar cell =UITableViewCell (Style:UITableViewCellStyle.Default, reuseidentifier:identify) the         //Auto Matte Invisible area, out of display -Cell.layer.masksToBounds =true Wu Cell.contentView.addSubview (label) - Cell.contentView.addSubview (TextView) About           $         //creating an array of controls -var views:nsmutabledictionary =nsmutabledictionary () -Views.setvalue (Label, Forkey:"label") -Views.setvalue (TextView, Forkey:"TextView") A cell.contentView.addConstraints (Nslayoutconstraint.constraintswithvisualformat ( +             "h:|-15-[label]-15-|", Options:nil, Metrics:nil, views:views)) the cell.contentView.addConstraints (Nslayoutconstraint.constraintswithvisualformat ( -             "h:|-15-[textview]-15-|", Options:nil, Metrics:nil, views:views)) $ cell.contentView.addConstraints (Nslayoutconstraint.constraintswithvisualformat ( the             "V:|[label (+)]", Options:nil, Metrics:nil, views:views)) the cell.contentView.addConstraints (Nslayoutconstraint.constraintswithvisualformat ( the             "V:|-40-[textview (+)]", Options:nil, Metrics:nil, views:views)) the         returnCell -     } in       the     //Uitableviewdelegate method, handling selected events for list items theFunc TableView (tableview:uitableview!, Didselectrowatindexpath indexpath:nsindexpath!) About     { theself.tableview!. Deselectrowatindexpath (Indexpath, animated:false) theSelectedcellindexpath =Indexpath the         //forces the table view to call Heightforrowatindexpath +tableview!. Reloadrowsatindexpaths ([Indexpath], - withRowAnimation:UITableViewRowAnimation.Automatic) the     }Bayi      the     //clicking on a cell will cause the cell height to change, so you need to reset the func TableView (Tableview:uitableview, -Heightforrowatindexpath Indexpath:nsindexpath)CGFloat { -             if(Selectedcellindexpath! = Nil && Selectedcellindexpath = =Indexpath) { the                 return  - the             } the             return  + the     } -}

iOS Development--ui_swift Chapter &uitableview Implementing cell Expansion and hiding