iOS Development--ui Article Swift &uipickerview

Uipickerview

1     //return button Events2 @IBAction func backbuttonclick ()3     {4Self.navigationcontroller?. Popviewcontrolleranimated (true)5     }6     7var authorsarray:[string]!8var appsarray:[string]!9     Ten      One     Overridefunc viewdidload () { A super.viewdidload () -          -Titlelabel.text =titlestring the          -          -         //Do any additional setup after loading the view. -          +         //Create a selection controller -var Pickerview:uipickerview = Uipickerview (Frame:cgrectmake (0, $,0,0)) +          A         //Add to view at Self.view.addSubview (Pickerview) -          -         //Specify the data source -Pickerview.datasource = Self -          -         //Specify proxy inPickerview.Delegate= Self -          to         //Create 2 Arrays +Authorsarray = ["Liu Mingyang","Wang Hongjun","Ninglai"] -Appsarray = ["Rental Reviews","where to run?","Alloff","Ijump"," Sudoku"] the          *          $         Panax Notoginseng          -         //Some of the commonly used properties and methods are introduced the          +          A          the  +          -          $     } $  -     Overridefunc didreceivememorywarning () { - super.didreceivememorywarning () the         //Dispose of any resources the can be recreated. -     }Wuyi      the  -     /* Wu //MARK:-Navigation -  About //In a storyboard-based application, you'll often want to do a little preparation before navigation $ override func Prepareforsegue (segue:uistoryboardsegue!, sender:anyobject!) { - //Get The new view controller using Segue.destinationviewcontroller. - //Pass The selected object to the new view controller. -     } A     */ +  the      -     //MARK:-Uipickerviewdatasource $  the     //How many columns are returned theFunc Numberofcomponentsinpickerview (Pickerview:uipickerview)Int the     { the         return 2 -     } in      the     //How many rows are returned for each column theFunc Pickerview (Pickerview:uipickerview, numberofrowsincomponent component:int)Int About     { the         //The 1th column returns the number of Authorsarray the         ifComponent = =0{ the             returnAuthorsarray.count +         } -         //the 2nd Column returns the number of Appsarray the         Else ifComponent = =1 {Bayi             returnAppsarray.count the         } the          -         return 0 -     } the      the     //MARK:-Uipickerviewdelegate the      the     //to create a selection controller by using a string - //func Pickerview (Pickerview:uipickerview, Titleforrow row:int, Forcomponent component:int), String! the //    { the //        //The 1th column returns the value corresponding to the Authorsarray the //if component = = 0{94 //return Authorsarray[row] the //        } the //         the //            //the 2nd column returns the value corresponding to the Appsarray98 //else if component = = 1 { About //return Appsarray[row] - //        }101 //        102 //return ""103 //    }104      the     //Create a selection controller with a picture with view106Func Pickerview (Pickerview:uipickerview, Viewforrow row:int, Forcomponent component:int, ReusingView view:uiview!)-&G TUIView107     {108var View:uiview = UIView (Frame:cgrectmake (0,0, $, +))109          the         //Create an image view111var ImageView = Uiimageview (Frame:cgrectmake (0,0, +, +)) theImageview.image = UIImage (named:"Cellimage.png")113          the          the         //Create a text label thevar Label:uilabel = UILabel (Frame:cgrectmake ( +,0, the, +))117         //The 1th column returns the value corresponding to the Authorsarray118         ifComponent = =0{119Label.text =Authorsarray[row] -         }121 122         //the 2nd column returns the value corresponding to the Appsarray123         Else ifComponent = =1 {124Label.text =Appsarray[row] the         }126         127          -         129         //Add Image the View.addsubview (ImageView)131          the         //Add a text label133 View.addsubview (label)134         135         returnView136     }137     138     139     //Trigger Agent event when option is changed $ func Pickerview (Pickerview:uipickerview, Didselectrow row:int, incomponent component:int)141     {142println"The current selection is the first \ (component) column (row) row")143}

iOS Development--ui Swift article &uipickerview