如何以编程方式为选择器视图设置标记？

Question

我正在使用swift构建iOS应用程序.

在我的viewcontroller中,我需要6个选择器视图.

以前我用IB创建了PickerViews.

现在我想以编程方式进行,因为我想实现完成和取消按钮.

我创建了一个示例项目并进行了检查.我正在显示选择器视图.

但在我原来的应用程序中,它不起作用.

可能是采摘者的数量很大.

并且每次选择器的标签值显示为零.

我试着像这样设置标签值,

pickerView.tag == 2

这是用于创建Picker的代码

 func createPicker1(){

        var pickerView = UIPickerView(frame: CGRectMake(0, 200, view.frame.width, 300))
        pickerView.tag == 2
        pickerView.backgroundColor = .greenColor()
        pickerView.delegate = self
        pickerView.dataSource = self
        pickerView.showsSelectionIndicator = true

        var toolBar = UIToolbar()
        toolBar.barStyle = UIBarStyle.Default
        toolBar.translucent = true
        toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1)
        toolBar.sizeToFit()

        println(pickerView.tag)
        var doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: "donePicker1")
        var spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
        var cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "canclePicker1")

        toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
        toolBar.userInteractionEnabled = true

        pwrd.inputView = pickerView
        pwrd.inputAccessoryView = toolBar     
    }

这些是我的Picker方法.

 func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {    
        return 1
    }
    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
      if (pickerView.tag == 0){
            return categories.count
        }
        else
      {
        return skillNeeded.count
        }
    }
    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {

        if (pickerView.tag == 0)  {

            return categories[row]
        }
        else{
            return skillNeeded[row]
        }

    }
    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
    {
        if (pickerView.tag == 0) {
        user.text = categories[row]
        }
        else  {
        pwrd.text = skillNeeded[row]
        }
    }

谢谢.您的帮助将不胜感激.

Answer 1

您没有使用==设置值

尝试 pickerView.tag = 2