Question

我实现了一个带有多个组件的选择器视图的演示

当我将值设置为正确的文本时我想输出是

one 1

但是设置了

    one
    1
    2
    two

下面是我的代码：

var  pickdata = [ ["one","Two"],
              ["1","2"]
            ]


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

  return pickdata.count
}   

func numberOfComponents(in pickerView: UIPickerView) -> Int 
{

    return 2
   }

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

    return pickdata[component][row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
   activeTextfield.text = pickdata[component][row]
    print(pickdata[component][row])
}

Answer 1

您应该将numberOfRowsInComponent方法更改为return pick date[0].count，因为您使用的是二维数组，并且希望返回内部数组中的对象数。

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
  return pickdata[0].count
}

我还建议您将数据结构更改为Dictionary<String,String>，对于这个二维数组的问题来说，这似乎已经足够了。

var pickData = ["one":1,"two":2]

Answer 2

像@david一样提到将数据结构更改为Dictionary将是正确的方法。如果你正在寻找一个简单的黑客，那么这个代码将有所帮助，虽然它不是最好的方法。对于输出“一1”等等这可能是有用的

    var pickDataIndices = ["1", "2"]
    var pickData = ["one", "Two"]


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

    return pickData.count
}

func numberOfComponents(in pickerView: UIPickerView) -> Int
{

    return 1
}

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {

    return pickData[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    activeTextfield.text = pickData[row]
    print("%@ %@",pickData[row], pickDataIndices[row])
}

当我使用带有多个组件的pickerview时，如何设置文本值

2 个答案: