iOS开发——UI篇Swift篇&UIPickerView

UIPickerView

     //返回按钮事件
     @IBAction func backButtonClick()
     {
         self.navigationController?.popViewControllerAnimated(true)
     }

     var authorsArray:[String]!
     var appsArray:[String]!

     override func viewDidLoad() {
         super.viewDidLoad()

         titleLabel.text = titleString

         // Do any additional setup after loading the view.

         //创建选择控制器
         var pickerView:UIPickerView = UIPickerView(frame: CGRectMake(, , , ))

         //添加到视图上
         self.view.addSubview(pickerView)

         //指定数据源
         pickerView.dataSource = self

         //指定代理
         pickerView.delegate = self

         //创建2个数组
         authorsArray = ["刘明洋","汪鸿俊","任小蕾"]
         appsArray = ["租房点评","哪里逃","AllOff","iJump","数独"]

         //常用的一些属性和方法介绍

     }

     override func didReceiveMemoryWarning() {
         super.didReceiveMemoryWarning()
         // Dispose of any resources that can be recreated.
     }

     /*
     // MARK: - Navigation

     // In a storyboard-based application, you will 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.
     }
     */

     // MARK: - UIPickerViewDataSource

     //返回多少列
     func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int
     {

     }

     //每一列返回多少行
     func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
     {
         //第1列返回authorsArray的个数
         {
             return authorsArray.count
         }
         //第2列返回appsArray的个数
          {
             return appsArray.count
         }

     }

     // MARK: - UIPickerViewDelegate

     //通过字符串来创建选择控制器
 //    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String!
 //    {
 //        //第1列返回authorsArray对应的值
 //        if component == 0{
 //            return authorsArray[row]
 //        }
 //
 //            //第2列返回appsArray对应的值
 //        else if component == 1 {
 //            return appsArray[row]
 //        }
 //
 //        return ""
 //    }

     //通过View来创建带有图片的选择控制器
     func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView!) -> UIView
     {
         var view:UIView = UIView(frame: CGRectMake(, , , ))

         //创建图像视图
         var imageView = UIImageView(frame: CGRectMake(, , , ))
         imageView.image = UIImage(named: "cellImage.png")

         //创建文本标签
         var label:UILabel = UILabel(frame: CGRectMake(, , , ))
         //第1列返回authorsArray对应的值
         {
             label.text =  authorsArray[row]
         }

         //第2列返回appsArray对应的值
          {
             label.text =  appsArray[row]
         }

         //添加图像
         view.addSubview(imageView)

         //添加文本标签
         view.addSubview(label)

         return view
     }

     //选项改变后，触发代理事件
     func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
     {
         println("当前选择的是第\(component)列   第\(row)行")
     }