Question

我开发了一个应用程序，其中我使用了两个带有tag属性的pickerview框：一个用于性别，一个用于项目列表。选择任意一个pickerview后，它将以某种方式将另一个pickerview增加到具有实际值的条目，而不是从我在[0]中创建的空条目开始。我进行了第一个选择，当我进入第二个列表时，它已经坐在50-55上（第一个具有值的条目位于1。如果我不从1移到另一个，然后回到1标签仍然是空白。如果我单击预选项目后再返回，一切正常，请粘贴下面的pickerview代码-让我知道是否需要更多信息，谢谢前进！</ p>

Added a video as to what exactly is happening:

let gendOption = ["", "Male","Female"] // first array for first textfield  
let actOption = ["", "50%-55%", "55%-60%", "60%-65%", "65%-70%", "70%-75%", "75%-80%", "80%-85%", "85%-90%", "90%-95%"] // array for 2nd textfield


let pickerView = UIPickerView()  
var currentTxtFldTag : Int = 10  


func numberOfComponents(in pickerView: UIPickerView) -> Int {  
    return 1  
}  

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {  
    // return priorityTypes.count  
    if currentTxtFldTag == 10  
    {  
        return gendOption.count  
    }  
    else  
    {  
        return actOption.count  
    }  
}  

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {  
    // return priorityTypes[row]  
    if currentTxtFldTag == 10  
    {  
        return gendOption[row]  
    }  
    else  
    {  
        return actOption[row]  
    }  
}  

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {  
    //selectedPriority = priorityTypes[row]  
    //activityTextBox.text = selectedPriority  
    if currentTxtFldTag == 10  
    {  
        genderSelection.text = gendOption[row]  
    }  
    else  
    {  
        activityTextBox.text = actOption[row]  

    }  
}  

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {  

    if textField.tag == 10  // *** OPTION  
    {  
        currentTxtFldTag = 10  
    }  
    else  // activity OPTION  
    {  
        currentTxtFldTag = 20  
    }  

    pickerView.reloadAllComponents()  
    return true  
}  

func createPickerView() {  
    let pickerView = UIPickerView()  
    pickerView.delegate = self  
    activityTextBox.inputView = pickerView  
}`

Answer 1

与其使用此currentTxtFldTag标志来查看您所指的pickerView，只需将每个pickerView保存为变量并检查您所指的pickerView直接在您的每个委托方法中使用，例如：

lazy var genderPickerView: UIPickerView = {
    let picker = UIPickerView()
    picker.delegate = self
    return picker
}()

lazy var otherPickerView: UIPickerView = {
    let picker = UIPickerView()
    picker.delegate = self
    return picker
}()

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {    
    // Use this check in each of your delegate methods for UIPickerViewDelegate
    if pickerView == genderPickerView
    {  
        genderSelection.text = gendOption[row]  
    }  
    else  
    {  
        activityTextBox.text = actOption[row]  

    }  
}

在1个ViewController中使用2个uipickerview

1 个答案: