我创建了一个UIView类,我在其中声明了pickerView并实现了所有必要的委托。当我点击文本字段时,pickerView中没有显示任何值,日志中出现警告
没有重复使用表格单元格的索引路径。
请帮我找出解决方案。
import UIKit
class CustomPickerView: UIView, UIPickerViewDelegate, UIPickerViewDataSource {
var pickerView = UIPickerView()
var pickerString: String?
var pickerArray = NSArray()
class var instance: CustomPickerView
{
let pickerVC = CustomPickerView()
return pickerVC
}
override init(frame: CGRect) {
super.init(frame : frame)
pickerView.delegate = self
pickerView.dataSource = self
pickerView.backgroundColor = UIColor.yellowColor()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setValueOfPicker(text: String, array: NSArray, textField: UITextField) -> Void {
pickerString = text
pickerArray = array
setPicker(textField)
pickerView.reloadAllComponents()
pickerView.selectRow(0, inComponent: 0, animated: true)
}
//MARK:
//MARK: Piker View Delegate & DataSource
//MARK:
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerArray.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if pickerString == "country" {
return pickerArray[row].valueForKey("country") as? String
}
else if pickerString == "printCoupon"
{
return pickerArray[row] as? String
}
return nil
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
}
func setPicker(dataTextField: UITextField)
{
dataTextField.inputView = pickerView;
let doneToolbar: UIToolbar = UIToolbar()
let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
let done: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Done, target: self, action: #selector(donePickerAction))
let cancle: UIBarButtonItem = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Done, target: self, action: #selector(canclePickerAction))
var items = [UIBarButtonItem]()
items.append(cancle)
items.append(flexSpace)
items.append(done)
doneToolbar.sizeToFit()
doneToolbar.items = items
dataTextField.inputAccessoryView = doneToolbar
}
答案 0 :(得分:0)
尝试实施此方法
func pickerView(pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusingView view: UIView?) -> UIView
{
let pickerLabel = UILabel()
if pickerString == "country" {
pickerLabel.text = pickerArray[row].valueForKey("country") as? String
}
else if pickerString == "printCoupon"
{
pickerLabel.text = pickerArray[row] as? String
}
pickerLabel.textAlignment = NSTextAlignment.Center
return pickerLabel
}