嗨，我是一个新的快速开发人员，我正在尝试找到一种方法来在后台线程中加载我所有的文本字段，然后使其在查看控制器出现之前返回主线程。
因为在我的viewcontroller中，我需要设置差不多20个文本字段，例如其样式，占位符等。因此，当我点击处理该vc的按钮时，viewcontroller会花费相当长的一段时间。
我知道我可以使用它在后台执行设置文本字段
DispatchQueue.global(qos: .userInteractive).async {
<#code#>
}
但是我不知道将这段代码放在哪里。我试图将其放在viewDidLoad中，但这似乎不起作用。
编辑：添加我的代码
import UIKit
import MaterialComponents.MaterialTextFields
class AddNewDataVC: UIViewController {
//Outlet
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var saveNewDataBtn: UIButton!
@IBOutlet weak var sowInfoInputsStackView: UIStackView!
@IBOutlet weak var giltInfoInputsStackView: UIStackView!
@IBOutlet weak var matingInfoInputsStackView: UIStackView!
@IBOutlet weak var farrowInfoInputsStackView: UIStackView!
@IBOutlet weak var vaccinTable: UITableView!
@IBOutlet weak var pigTypeTextField: PickerTextField!
@IBOutlet weak var genderTextField: PickerTextField!
@IBOutlet weak var chipIDTextField: MDCTextField!
@IBOutlet weak var breedTextField: MDCTextField!
@IBOutlet weak var subBreedTextField: MDCTextField!
@IBOutlet weak var dadIDTextField: MDCTextField!
@IBOutlet weak var momIDTextField: MDCTextField!
@IBOutlet weak var penIDTextField: MDCTextField!
@IBOutlet weak var weightTextField: MDCTextField!
@IBOutlet weak var parityTextField: MDCTextField!
@IBOutlet weak var birthDateTextField: PickerTextField!
@IBOutlet weak var weanDateTextField: PickerTextField!
@IBOutlet weak var arrivalDateTextField: PickerTextField!
@IBOutlet weak var herdEntryDateTextField: PickerTextField!
@IBOutlet weak var startOffDutySowDateTextField: PickerTextField!
@IBOutlet weak var semenFromBoarIDTextField: MDCTextField!
@IBOutlet weak var technicianNameTextField: PickerTextField!
@IBOutlet weak var matingDateTextField: PickerTextField!
@IBOutlet weak var estimateBirthDateTextField: PickerTextField!
@IBOutlet weak var realBirthDateTextField: PickerTextField!
@IBOutlet weak var totalNumberOfNewBornsTextField: MDCTextField!
@IBOutlet weak var totalNumberOfDeadNewBornsTextField: MDCTextField!
@IBOutlet weak var averageWeightOfNewBornsTextField: MDCTextField!
@IBOutlet weak var accoucheurNameTextField: MDCTextField!
@IBOutlet weak var newBornDeathReason1TextField: MDCTextField!
@IBOutlet weak var newBornDeathReason2TextField: MDCTextField!
@IBOutlet weak var newBornDeathReason3TextField: MDCTextField!
@IBOutlet weak var newBornCullReason1TextField: MDCTextField!
@IBOutlet weak var newBornCullReason2TextField: MDCTextField!
@IBOutlet weak var newBornCullReason3TextField: MDCTextField!
//Properties
var pigTypeController: MDCTextInputControllerUnderline?
var genderController: MDCTextInputControllerUnderline?
var chipIDController: MDCTextInputControllerUnderline?
var breedController: MDCTextInputControllerUnderline?
var subBreedController: MDCTextInputControllerUnderline?
var dadIDController: MDCTextInputControllerUnderline?
var momIDController: MDCTextInputControllerUnderline?
var penIDController: MDCTextInputControllerUnderline?
var weightController: MDCTextInputControllerUnderline?
var parityController: MDCTextInputControllerUnderline?
var birthDateController: MDCTextInputControllerUnderline?
var weanDateController: MDCTextInputControllerUnderline?
var arrivalDateController: MDCTextInputControllerUnderline?
var herdEntryDateController: MDCTextInputControllerUnderline?
var startOffDutySowDateController: MDCTextInputControllerUnderline?
var semenFromBoarIDController: MDCTextInputControllerUnderline?
var techicianNameController: MDCTextInputControllerUnderline?
var matingDateController: MDCTextInputControllerUnderline?
var estimateBirthDateController: MDCTextInputControllerUnderline?
var realBirthDateController: MDCTextInputControllerUnderline?
var totalNumberOfNewBornsController: MDCTextInputControllerUnderline?
var totalNumberOfDeadNewBornsController: MDCTextInputControllerUnderline?
var averageWeightOfNewBornsController: MDCTextInputControllerUnderline?
var accoucheurNameController: MDCTextInputControllerUnderline?
var newBornDeathReason1Controller: MDCTextInputControllerUnderline?
var newBornDeathReason2Controller: MDCTextInputControllerUnderline?
var newBornDeathReason3Controller: MDCTextInputControllerUnderline?
var newBornCullReason1Controller: MDCTextInputControllerUnderline?
var newBornCullReason2Controller: MDCTextInputControllerUnderline?
var newBornCullReason3Controller: MDCTextInputControllerUnderline?
var allTextFieldControllers = [MDCTextInputControllerUnderline]()
var injectedVaccinArray = [[String : Any]]()
override func viewDidLoad() {
super.viewDidLoad()
setupTextFields()
registerKeyboardNotifications()
addGestureRecognizer()
vaccinTable.dataSource = self
vaccinTable.delegate = self
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
NotificationCenter.default.removeObserver(self)
}
@IBAction func closeAddNewDataPopupBtnPressed(_ sender: UIButton) {
dismiss(animated: true, completion: nil)
}
@IBAction func saveNewDataBtnPressed(_ sender: Any) {
}
@IBAction func addVaccinDataBtnPressed(_ sender: UIButton) {
let getDestStoryboard = UIStoryboard(name: "AddNewData", bundle: nil)
let popupVC = getDestStoryboard.instantiateViewController(withIdentifier: "addVaccinDataVC") as! AddVaccinInfoVC
popupVC.popupDelegate = self
self.present(popupVC, animated: true, completion: nil)
}
}
extension AddNewDataVC {
func setupTextFields() {
pigTypeController = MDCTextInputControllerUnderline(textInput: pigTypeTextField)
pigTypeTextField.delegate = self
pigTypeTextField.addData(data: PIG_TYPES_ENUM.allValues)
pigTypeController?.placeholderText = "Loại lợn"
allTextFieldControllers.append(pigTypeController!)
genderController = MDCTextInputControllerUnderline(textInput: genderTextField)
genderTextField.delegate = self
genderTextField.addData(data: GENDERS)
genderController?.placeholderText = "Giới tính"
allTextFieldControllers.append(genderController!)
chipIDController = MDCTextInputControllerUnderline(textInput: chipIDTextField)
chipIDTextField.delegate = self
chipIDController?.placeholderText = "Số chip"
allTextFieldControllers.append(chipIDController!)
breedController = MDCTextInputControllerUnderline(textInput: breedTextField)
breedTextField.delegate = self
breedController?.placeholderText = "Giống"
allTextFieldControllers.append(breedController!)
subBreedController = MDCTextInputControllerUnderline(textInput: subBreedTextField)
subBreedTextField.delegate = self
subBreedController?.placeholderText = "Giống phụ"
allTextFieldControllers.append(subBreedController!)
dadIDController = MDCTextInputControllerUnderline(textInput: dadIDTextField)
dadIDTextField.delegate = self
dadIDController?.placeholderText = "Số chip bố mẹ"
allTextFieldControllers.append(dadIDController!)
momIDController = MDCTextInputControllerUnderline(textInput: momIDTextField)
momIDTextField.delegate = self
momIDController?.placeholderText = "Số chip mẹ"
allTextFieldControllers.append(momIDController!)
penIDController = MDCTextInputControllerUnderline(textInput: penIDTextField)
penIDTextField.delegate = self
penIDController?.placeholderText = "Số chuồng"
allTextFieldControllers.append(penIDController!)
weightController = MDCTextInputControllerUnderline(textInput: weightTextField)
weightTextField.delegate = self
weightController?.placeholderText = "Số kg"
allTextFieldControllers.append(weightController!)
parityController = MDCTextInputControllerUnderline(textInput: parityTextField)
parityTextField.delegate = self
parityController?.placeholderText = "Số lứa"
allTextFieldControllers.append(parityController!)
birthDateController = MDCTextInputControllerUnderline(textInput: birthDateTextField)
birthDateTextField.delegate = self
birthDateController?.placeholderText = "Ngày sinh"
allTextFieldControllers.append(birthDateController!)
weanDateController = MDCTextInputControllerUnderline(textInput: weanDateTextField)
weanDateTextField.delegate = self
weanDateController?.placeholderText = "Ngày cai sữa"
allTextFieldControllers.append(weanDateController!)
arrivalDateController = MDCTextInputControllerUnderline(textInput: arrivalDateTextField)
arrivalDateTextField.delegate = self
arrivalDateController?.placeholderText = "Ngày đến"
allTextFieldControllers.append(arrivalDateController!)
herdEntryDateController = MDCTextInputControllerUnderline(textInput: herdEntryDateTextField)
herdEntryDateTextField.delegate = self
herdEntryDateController?.placeholderText = "Ngày nhập đàn"
allTextFieldControllers.append(herdEntryDateController!)
startOffDutySowDateController = MDCTextInputControllerUnderline(textInput: startOffDutySowDateTextField)
startOffDutySowDateTextField.delegate = self
startOffDutySowDateController?.placeholderText = "Ngày nái nghỉ"
allTextFieldControllers.append(startOffDutySowDateController!)
semenFromBoarIDController = MDCTextInputControllerUnderline(textInput: semenFromBoarIDTextField)
semenFromBoarIDTextField.delegate = self
semenFromBoarIDController?.placeholderText = "Mã heo nọc"
allTextFieldControllers.append(semenFromBoarIDController!)
techicianNameController = MDCTextInputControllerUnderline(textInput: technicianNameTextField)
technicianNameTextField.delegate = self
techicianNameController?.placeholderText = "Người phối"
technicianNameTextField.addData(data: TECHNICIAN_NAMES)
allTextFieldControllers.append(techicianNameController!)
matingDateController = MDCTextInputControllerUnderline(textInput: matingDateTextField)
matingDateTextField.delegate = self
matingDateController?.placeholderText = "Ngày phối"
allTextFieldControllers.append(matingDateController!)
estimateBirthDateController = MDCTextInputControllerUnderline(textInput: estimateBirthDateTextField)
estimateBirthDateTextField.delegate = self
estimateBirthDateController?.placeholderText = "Ngày đẻ dự kiến"
allTextFieldControllers.append(estimateBirthDateController!)
realBirthDateController = MDCTextInputControllerUnderline(textInput: realBirthDateTextField)
realBirthDateTextField.delegate = self
realBirthDateController?.placeholderText = "Ngày đẻ thực tế"
allTextFieldControllers.append(realBirthDateController!)
totalNumberOfNewBornsController = MDCTextInputControllerUnderline(textInput: totalNumberOfNewBornsTextField)
totalNumberOfNewBornsTextField.delegate = self
totalNumberOfNewBornsController?.placeholderText = "Tổng heo con sinh"
allTextFieldControllers.append(totalNumberOfNewBornsController!)
totalNumberOfDeadNewBornsController = MDCTextInputControllerUnderline(textInput: totalNumberOfDeadNewBornsTextField)
totalNumberOfDeadNewBornsTextField.delegate = self
totalNumberOfDeadNewBornsController?.placeholderText = "Tổng heo con chết"
allTextFieldControllers.append(totalNumberOfDeadNewBornsController!)
averageWeightOfNewBornsController = MDCTextInputControllerUnderline(textInput: averageWeightOfNewBornsTextField)
averageWeightOfNewBornsTextField.delegate = self
averageWeightOfNewBornsController?.placeholderText = "Kg trung bình"
allTextFieldControllers.append(averageWeightOfNewBornsController!)
accoucheurNameController = MDCTextInputControllerUnderline(textInput: accoucheurNameTextField)
accoucheurNameTextField.delegate = self
accoucheurNameController?.placeholderText = "Người đỡ đẻ"
allTextFieldControllers.append(accoucheurNameController!)
newBornDeathReason1Controller = MDCTextInputControllerUnderline(textInput: newBornDeathReason1TextField)
newBornDeathReason1TextField.delegate = self
newBornDeathReason1Controller?.placeholderText = "Chết khô"
allTextFieldControllers.append(newBornDeathReason1Controller!)
newBornDeathReason2Controller = MDCTextInputControllerUnderline(textInput: newBornDeathReason2TextField)
newBornDeathReason2TextField.delegate = self
newBornDeathReason2Controller?.placeholderText = "Chết lưu"
allTextFieldControllers.append(newBornDeathReason2Controller!)
newBornDeathReason3Controller = MDCTextInputControllerUnderline(textInput: newBornDeathReason3TextField)
newBornDeathReason3TextField.delegate = self
newBornDeathReason3Controller?.placeholderText = "Chết tươi"
allTextFieldControllers.append(newBornDeathReason3Controller!)
newBornCullReason1Controller = MDCTextInputControllerUnderline(textInput: newBornCullReason1TextField)
newBornCullReason1TextField.delegate = self
newBornCullReason1Controller?.placeholderText = "Loại nhỏ"
allTextFieldControllers.append(newBornCullReason1Controller!)
newBornCullReason2Controller = MDCTextInputControllerUnderline(textInput: newBornCullReason2TextField)
newBornCullReason2TextField.delegate = self
newBornCullReason2Controller?.placeholderText = "Loại yếu"
allTextFieldControllers.append(newBornCullReason2Controller!)
newBornCullReason3Controller = MDCTextInputControllerUnderline(textInput: newBornCullReason3TextField)
newBornCullReason3TextField.delegate = self
newBornCullReason3Controller?.placeholderText = "Loại nhỏ"
allTextFieldControllers.append(newBornCullReason3Controller!)
for controller in allTextFieldControllers {
controller.activeColor = Theme.darkAccent
controller.floatingPlaceholderActiveColor = Theme.darkAccent
}
}
func addGestureRecognizer() {
let tapRecognizer = UITapGestureRecognizer(target: self,
action: #selector(tapDidTouch(sender: )))
self.scrollView.addGestureRecognizer(tapRecognizer)
}
@objc func tapDidTouch(sender: Any) {
self.view.endEditing(true)
}
func registerKeyboardNotifications() {
let notificationCenter = NotificationCenter.default
notificationCenter.addObserver(
self,
selector: #selector(keyboardWillShow(notif:)),
name: .UIKeyboardWillChangeFrame,
object: nil)
notificationCenter.addObserver(
self,
selector: #selector(keyboardWillShow(notif:)),
name: .UIKeyboardWillShow,
object: nil)
notificationCenter.addObserver(
self,
selector: #selector(keyboardWillHide(notif:)),
name: .UIKeyboardWillHide,
object: nil)
}
@objc func keyboardWillShow(notif: Notification) {
guard let frame = notif.userInfo?[UIKeyboardFrameEndUserInfoKey] as? CGRect else {
return
}
scrollView.contentInset = UIEdgeInsets(top: 0.0,
left: 0.0,
bottom: frame.height,
right: 0.0)
}
@objc func keyboardWillHide(notif: Notification) {
scrollView.contentInset = UIEdgeInsets()
}
func toggleFarrowInfoInputsStackView(toggle: Bool) {
if toggle {
sowInfoInputsStackView.isHidden = false
} else {
sowInfoInputsStackView.isHidden = true
}
}
func toggleGiltInputs(toggle: Bool) {
if toggle {
giltInfoInputsStackView.isHidden = false
} else {
giltInfoInputsStackView.isHidden = true
}
}
func toggleOffDutySowInputs(toggle: Bool) {
if toggle {
startOffDutySowDateTextField.isHidden = false
} else {
startOffDutySowDateTextField.isHidden = true
}
}
func toggleMatingInputs(toggle: Bool) {
if toggle {
matingInfoInputsStackView.isHidden = false
} else {
matingInfoInputsStackView.isHidden = true
}
}
func toggleFarrowInputs(toggle: Bool) {
if toggle {
farrowInfoInputsStackView.isHidden = false
} else {
farrowInfoInputsStackView.isHidden = true
}
}
func toggleParityTextField(toggle: Bool) {
if toggle {
parityTextField.isHidden = false
} else {
parityTextField.isHidden = true
}
}
}
extension AddNewDataVC: UITextFieldDelegate {
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return false
}
func textFieldDidEndEditing(_ textField: UITextField) {
if let textField = textField as? PickerTextField {
let text = textField.text?.lowercased()
if !textField.isDatePicker && textField == pigTypeTextField {
if text!.contains("nái") || textField.text! == PIG_TYPES_ENUM.gilt.rawValue {
toggleFarrowInfoInputsStackView(toggle: true)
if textField.text! == PIG_TYPES_ENUM.gilt.rawValue {
toggleGiltInputs(toggle: true)
toggleOffDutySowInputs(toggle: false)
toggleMatingInputs(toggle: false)
toggleFarrowInputs(toggle: false)
} else if textField.text! == PIG_TYPES_ENUM.offDutySow.rawValue {
toggleGiltInputs(toggle: true)
toggleOffDutySowInputs(toggle: true)
toggleMatingInputs(toggle: false)
toggleFarrowInputs(toggle: false)
} else if textField.text! == PIG_TYPES_ENUM.matingSow.rawValue {
toggleGiltInputs(toggle: true)
toggleOffDutySowInputs(toggle: false)
toggleMatingInputs(toggle: true)
toggleFarrowInputs(toggle: false)
} else if textField.text! == PIG_TYPES_ENUM.farrow.rawValue {
toggleGiltInputs(toggle: true)
toggleOffDutySowInputs(toggle: false)
toggleMatingInputs(toggle: true)
toggleFarrowInputs(toggle: true)
}
} else {
toggleFarrowInfoInputsStackView(toggle: false)
toggleGiltInputs(toggle: false)
toggleOffDutySowInputs(toggle: false)
toggleMatingInputs(toggle: false)
toggleFarrowInputs(toggle: false)
if textField.text! == PIG_TYPES_ENUM.boar.rawValue {
genderTextField.text = "Đực"
genderTextField.isUserInteractionEnabled = false
} else {
genderTextField.text = ""
genderTextField.isUserInteractionEnabled = true
}
}
} else if !textField.isDatePicker && textField == genderTextField {
if textField.text == "Cái" {
toggleParityTextField(toggle: true)
} else {
toggleParityTextField(toggle: false)
}
}
}
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if textField is PickerTextField {
textField.resignFirstResponder()
return false
} else {
return true
}
}
}
extension AddNewDataVC: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return injectedVaccinArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = vaccinTable.dequeueReusableCell(withIdentifier: "injectedVaccinCell", for: indexPath) as? InjectedVaccinCell else {
return UITableViewCell()
}
cell.configureCell(value: injectedVaccinArray[indexPath.row])
return cell
}
}
extension AddNewDataVC: PopupDelegates {
func popupValueSelected(value: [String : Any]) {
self.injectedVaccinArray.append(value)
self.vaccinTable.reloadData()
}
}
我知道还有很多改进的余地，但是我只是学得很快，所以很抱歉，如果我的代码使您发痒哈哈。现在，我只是专注于使其工作，并将稍后尝试对其进行清理。