如何将选定的数据从 PopUpTableViewController 传递到 Swift 中的其他 TableViewController？
How to pass selected data from a PopUpTableViewController to other TableViewController in Swift?
我有 2 个视图控制器：在第一个 ViewController 中有一个 TableView，我在每个 TableViewCell 中都有一个按钮 select 一个运送选项。单击该按钮时，将弹出另一个 TableViewController，其中包含运输选项列表。选择运输选项后，我需要在第一个 ViewController 中将此数据传回 TableViewCell。我写了下面的代码，但是第二个表 ViewController 中的运输选项 select 仍然没有传递给第一个控制器。其他事情工作正常。谁能帮助我知道如何改进这段代码？百万感谢！
//第一个ViewController:
class PaymentMethodViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
//MARK: - IBOutlets
@IBOutlet weak var PurchasedReviewItemsTableView: UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "PurchasedReviewItemsTableViewCell") as! PurchasedReviewItemsTableViewCell
cell.delegate = self
}
}
extension PaymentMethodViewController: PurchasedReviewItemsTableViewCellDelegate {
func chooseShippingOptionButtonPressed() {
let chooseShippingOptionVC = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(identifier: "ShippingOptionsSelectionPopUpViewController") as! ShippingOptionsSelectionPopUpViewController
chooseShippingOptionVC.modalPresentationStyle = .overCurrentContext
self.present(chooseShippingOptionVC, animated: true, completion: nil)
}
//MARK: Pass data from popUpView
func popUpShippingOptionsSelected(shippingOption: String) {
let cell = PurchasedReviewItemsTableView.dequeueReusableCell(withIdentifier: "PurchasedReviewItemsTableViewCell") as! PurchasedReviewItemsTableViewCell
cell.shippingOptionsLabel.text = shippingOption
}
}
//第一个TableViewCell ViewController:
protocol PurchasedReviewItemsTableViewCellDelegate {
func chooseShippingOptionButtonPressed()
func popUpShippingOptionsSelected(shippingOption: String)
}
class PurchasedReviewItemsTableViewCell: UITableViewCell {
@IBOutlet weak var shippingOptionsLabel: UILabel!
var delegate: PurchasedReviewItemsTableViewCellDelegate?
@IBAction func changeShippingOptionButtonPressed(_ sender: Any) {
delegate?.chooseShippingOptionButtonPressed()
}
}
//第二表ViewController:
class ShippingOptionsSelectionPopUpViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var selectedShippingOption : String?
var shippingOption = ["X", "Y"]
var delegate: ShippingOptionsSelectionPopUpDelegate?
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
2
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ShippingOptionsSelectionPopUpTableViewCell", for: indexPath) as! ShippingOptionsSelectionPopUpTableViewCell
cell.selectShippingOption(shippingOption: shippingOption[indexPath.row])
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
selectedShippingOption = shippingOption[indexPath.row]
delegate?.popUpShippingOptionsSelected(shippingOption: selectedShippingOption!)
dismiss(animated: true, completion: nil)
}
}
为 popUpShippingOptionsSelected 定义单独的协议
protocol ShippingOptionsDelegate {
func popUpShippingOptionsSelected(shippingOption: String)
}
class ShippingOptionsSelectionPopUpViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var selectedShippingOption : String?
var shippingOption = ["X", "Y"]
var shippingOptiondelegate: ShippingOptionsSelectionPopUpDelegate?
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
2
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ShippingOptionsSelectionPopUpTableViewCell", for: indexPath) as! ShippingOptionsSelectionPopUpTableViewCell
cell.selectShippingOption(shippingOption: shippingOption[indexPath.row])
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
selectedShippingOption = shippingOption[indexPath.row]
shippingOptiondelegate?.popUpShippingOptionsSelected(shippingOption: selectedShippingOption!)
dismiss(animated: true, completion: nil)
}
}
向单元格添加标签
class PaymentMethodViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
//MARK: - IBOutlets
@IBOutlet weak var PurchasedReviewItemsTableView: UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "PurchasedReviewItemsTableViewCell") as! PurchasedReviewItemsTableViewCell
cell.delegate = self
cell.tag = 100 // Set tag
}
}
使用 ShippingOptionsDelegate 更新扩展
extension PaymentMethodViewController: PurchasedReviewItemsTableViewCellDelegate, ShippingOptionsDelegate {
func chooseShippingOptionButtonPressed() {
let chooseShippingOptionVC = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(identifier: "ShippingOptionsSelectionPopUpViewController") as! ShippingOptionsSelectionPopUpViewController
chooseShippingOptionVC.shippingOptiondelegate = self
chooseShippingOptionVC.modalPresentationStyle = .overCurrentContext
self.present(chooseShippingOptionVC, animated: true, completion: nil)
}
//MARK: Pass data from popUpView
func popUpShippingOptionsSelected(shippingOption: String) {
let cell = PurchasedReviewItemsTableView.viewWithTag(100) as! PurchasedReviewItemsTableViewCell // use tag to get cell
cell.shippingOptionsLabel.text = shippingOption
}
}
我有 2 个视图控制器：在第一个 ViewController 中有一个 TableView，我在每个 TableViewCell 中都有一个按钮 select 一个运送选项。单击该按钮时，将弹出另一个 TableViewController，其中包含运输选项列表。选择运输选项后，我需要在第一个 ViewController 中将此数据传回 TableViewCell。我写了下面的代码，但是第二个表 ViewController 中的运输选项 select 仍然没有传递给第一个控制器。其他事情工作正常。谁能帮助我知道如何改进这段代码？百万感谢！
//第一个ViewController:
class PaymentMethodViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
//MARK: - IBOutlets
@IBOutlet weak var PurchasedReviewItemsTableView: UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "PurchasedReviewItemsTableViewCell") as! PurchasedReviewItemsTableViewCell
cell.delegate = self
}
}
extension PaymentMethodViewController: PurchasedReviewItemsTableViewCellDelegate {
func chooseShippingOptionButtonPressed() {
let chooseShippingOptionVC = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(identifier: "ShippingOptionsSelectionPopUpViewController") as! ShippingOptionsSelectionPopUpViewController
chooseShippingOptionVC.modalPresentationStyle = .overCurrentContext
self.present(chooseShippingOptionVC, animated: true, completion: nil)
}
//MARK: Pass data from popUpView
func popUpShippingOptionsSelected(shippingOption: String) {
let cell = PurchasedReviewItemsTableView.dequeueReusableCell(withIdentifier: "PurchasedReviewItemsTableViewCell") as! PurchasedReviewItemsTableViewCell
cell.shippingOptionsLabel.text = shippingOption
}
}
//第一个TableViewCell ViewController:
protocol PurchasedReviewItemsTableViewCellDelegate {
func chooseShippingOptionButtonPressed()
func popUpShippingOptionsSelected(shippingOption: String)
}
class PurchasedReviewItemsTableViewCell: UITableViewCell {
@IBOutlet weak var shippingOptionsLabel: UILabel!
var delegate: PurchasedReviewItemsTableViewCellDelegate?
@IBAction func changeShippingOptionButtonPressed(_ sender: Any) {
delegate?.chooseShippingOptionButtonPressed()
}
}
//第二表ViewController:
class ShippingOptionsSelectionPopUpViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var selectedShippingOption : String?
var shippingOption = ["X", "Y"]
var delegate: ShippingOptionsSelectionPopUpDelegate?
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
2
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ShippingOptionsSelectionPopUpTableViewCell", for: indexPath) as! ShippingOptionsSelectionPopUpTableViewCell
cell.selectShippingOption(shippingOption: shippingOption[indexPath.row])
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
selectedShippingOption = shippingOption[indexPath.row]
delegate?.popUpShippingOptionsSelected(shippingOption: selectedShippingOption!)
dismiss(animated: true, completion: nil)
}
}
为 popUpShippingOptionsSelected 定义单独的协议
protocol ShippingOptionsDelegate {
func popUpShippingOptionsSelected(shippingOption: String)
}
class ShippingOptionsSelectionPopUpViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var selectedShippingOption : String?
var shippingOption = ["X", "Y"]
var shippingOptiondelegate: ShippingOptionsSelectionPopUpDelegate?
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
2
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ShippingOptionsSelectionPopUpTableViewCell", for: indexPath) as! ShippingOptionsSelectionPopUpTableViewCell
cell.selectShippingOption(shippingOption: shippingOption[indexPath.row])
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
selectedShippingOption = shippingOption[indexPath.row]
shippingOptiondelegate?.popUpShippingOptionsSelected(shippingOption: selectedShippingOption!)
dismiss(animated: true, completion: nil)
}
}
向单元格添加标签
class PaymentMethodViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
//MARK: - IBOutlets
@IBOutlet weak var PurchasedReviewItemsTableView: UITableView!
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "PurchasedReviewItemsTableViewCell") as! PurchasedReviewItemsTableViewCell
cell.delegate = self
cell.tag = 100 // Set tag
}
}
使用 ShippingOptionsDelegate 更新扩展
extension PaymentMethodViewController: PurchasedReviewItemsTableViewCellDelegate, ShippingOptionsDelegate {
func chooseShippingOptionButtonPressed() {
let chooseShippingOptionVC = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(identifier: "ShippingOptionsSelectionPopUpViewController") as! ShippingOptionsSelectionPopUpViewController
chooseShippingOptionVC.shippingOptiondelegate = self
chooseShippingOptionVC.modalPresentationStyle = .overCurrentContext
self.present(chooseShippingOptionVC, animated: true, completion: nil)
}
//MARK: Pass data from popUpView
func popUpShippingOptionsSelected(shippingOption: String) {
let cell = PurchasedReviewItemsTableView.viewWithTag(100) as! PurchasedReviewItemsTableViewCell // use tag to get cell
cell.shippingOptionsLabel.text = shippingOption
}
}