我在我身边。我的简单任务是使用 apickerView来设置一个默认值，如果它是以前设置的，当它关闭时。但问题出在任何逻辑上。它滚动到默认行并设置标题，但是当我尝试更改它时，它会滚动回默认值。我以为我可以设置一个布尔值条件，但现在无论我把它放在哪里都会影响。
任何帮助都会很棒。我在 Swift 中没有足够的基础知识来知道控制在哪里以正确的方式做到这一点。这是它的肉。
/选取器视图函数...
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int{
return pickerData.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if (mySavedBool) { //this is true
let pickerIndexVal = pickerViewTitty(sourceNewSelected: mySavedSource)
pickerView.selectRow(pickerIndexVal, inComponent: 0, animated: true)
}
print(pickerData[row].id)
NameLabel.text = pickerData[row].name
return pickerData[row].name
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int){
NameLabel.text = pickerData[row].name
NameLabelID.text = pickerData[row].id
mySavedSource = pickerData[row].id //Set the source equal to the source id needed in the URL
UserDefaults.standard.set(mySavedSource, forKey: "mySavedSource") //set the selection to save in the pfile
print("Inside pickerView mySavedBool = \(mySavedBool) and Plist defaults in picker \(mySavedSource)")
}
override func viewDidLoad() {
super.viewDidLoad()
print("On viewDidLoad mySavedSource is \(mySavedSource) and mySavedBoolTest is \(mySavedBool)")
tableView.refreshControl = refreshControl
refreshControl.addTarget(self, action: #selector(ViewController.refreshData), for: UIControl.Event.valueChanged)
myPicker.delegate = self
myPicker.dataSource = self
tableView.dataSource = self
tableView.delegate = self
fetchURLSource()
fetchURLData()
}
@objc func refreshData () {
print("refresh Data Called and mySavedBoolTest \(mySavedBool)")
print("source Selected at start of refresh \(mySavedSource)")
fetchURLData()
tableView.reloadData()
refreshControl.endRefreshing()
print("Looks Done")
}