iOS开发——UI篇Swift篇&UIPickerView

UIPickerView

 

  1     //返回按钮事件

  2     @IBAction func backButtonClick()

  3     {

  4         self.navigationController?.popViewControllerAnimated(true)

  5     }

  6     

  7     var authorsArray:[String]!

  8     var appsArray:[String]!

  9     

 10     

 11     override func viewDidLoad() {

 12         super.viewDidLoad()

 13         

 14         titleLabel.text = titleString

 15         

 16         

 17         // Do any additional setup after loading the view.

 18         

 19         //创建选择控制器

 20         var pickerView:UIPickerView = UIPickerView(frame: CGRectMake(0, 200, 0, 0))

 21         

 22         //添加到视图上

 23         self.view.addSubview(pickerView)

 24         

 25         //指定数据源

 26         pickerView.dataSource = self

 27         

 28         //指定代理

 29         pickerView.delegate = self

 30         

 31         //创建2个数组

 32         authorsArray = ["刘明洋","汪鸿俊","任小蕾"]

 33         appsArray = ["租房点评","哪里逃","AllOff","iJump","数独"]

 34         

 35         

 36         

 37         

 38         //常用的一些属性和方法介绍

 39         

 40         

 41         

 42 

 43         

 44         

 45     }

 46 

 47     override func didReceiveMemoryWarning() {

 48         super.didReceiveMemoryWarning()

 49         // Dispose of any resources that can be recreated.

 50     }

 51     

 52 

 53     /*

 54     // MARK: - Navigation

 55 

 56     // In a storyboard-based application, you will often want to do a little preparation before navigation

 57     override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {

 58         // Get the new view controller using segue.destinationViewController.

 59         // Pass the selected object to the new view controller.

 60     }

 61     */

 62 

 63     

 64     // MARK: - UIPickerViewDataSource

 65 

 66     //返回多少列

 67     func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int

 68     {

 69         return 2

 70     }

 71     

 72     //每一列返回多少行

 73     func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int

 74     {

 75         //第1列返回authorsArray的个数

 76         if component == 0{

 77             return authorsArray.count

 78         }

 79         //第2列返回appsArray的个数

 80         else if component == 1 {

 81             return appsArray.count

 82         }

 83         

 84         return 0

 85     }

 86     

 87     // MARK: - UIPickerViewDelegate

 88     

 89     //通过字符串来创建选择控制器

 90 //    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String!

 91 //    {

 92 //        //第1列返回authorsArray对应的值

 93 //        if component == 0{

 94 //            return authorsArray[row]

 95 //        }

 96 //        

 97 //            //第2列返回appsArray对应的值

 98 //        else if component == 1 {

 99 //            return appsArray[row]

100 //        }

101 //        

102 //        return ""

103 //    }

104     

105     //通过View来创建带有图片的选择控制器

106     func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView

107     {

108         var view:UIView = UIView(frame: CGRectMake(0, 0, 200, 40))

109         

110         //创建图像视图

111         var imageView = UIImageView(frame: CGRectMake(0, 0, 40, 40))

112         imageView.image = UIImage(named: "cellImage.png")

113         

114         

115         //创建文本标签

116         var label:UILabel = UILabel(frame: CGRectMake(40, 0, 160, 40))

117         //第1列返回authorsArray对应的值

118         if component == 0{

119             label.text =  authorsArray[row]

120         }

121 

122         //第2列返回appsArray对应的值

123         else if component == 1 {

124             label.text =  appsArray[row]

125         }

126         

127         

128         

129         //添加图像

130         view.addSubview(imageView)

131         

132         //添加文本标签

133         view.addSubview(label)

134         

135         return view

136     }

137     

138     

139     //选项改变后，触发代理事件

140     func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)

141     {

142         println("当前选择的是第\(component)列   第\(row)行")

143     }