如何快速将一个视图控制器值发送到另一个视图控制器表视图？

Question

我有如下三个视图控制器

Add address Table view 这是 AddAddressViewcontroller，如果我选择 addaddress 按钮，它会转到 profileviewcontroller 如果我点击继续，它会转到 ZoomMapviewcontroller 这是我确认然后我需要在AddAddressViewcontroller 中显示下面的标签文本 添加地址表视图怎么做。

ZoomMapview控制器代码：

protocol DataEnteredDelegate: class {
func userDidEnterInformation(info: DataEnteredModelSave)
}

class NewZoomAddressViewController: UIViewController {
weak var delegate: DataEnteredDelegate? = nil

var zipName: String?
var localityName: String?
var sublocalityName: String?

@IBOutlet weak var mapView: MKMapView!
@IBOutlet weak var addressLabel: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()
}
@IBAction func confirmBtn(_ sender: Any) {

    let viewController = self.storyboard?.instantiateViewController(withIdentifier: "AddAddressViewController") as! AddAddressViewController
   guard
        let zipName = zipName,
        let sublocalityName = sublocalityName,
        let localityName = localityName
        else { return }
    let enteredData = DataEnteredModelSave(pinCode: zipName, streetField: sublocalityName, cityField: localityName)
    delegate?.userDidEnterInformation(info: enteredData)
    self.navigationController?.pushViewController(viewController, animated: true)

}
}

这里如何将 zipName、locality、subLocality 值发送​​到 Addaddressviewcontroller tableview

AddressViewcontroller代码：

 class AddAddressViewController: UIViewController,DataEnteredDelegate {
@IBOutlet var addressEDITTableview: UITableView!

var city: String?
var pincode: String?
var locality: String?

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell: EditAddressTableViewCell = tableView.dequeueReusableCell(withIdentifier: "EditAddressTableViewCell") as! EditAddressTableViewCell
    cell.nameHeader.text = "header"
    cell.addressLabel.text = "\(city!) \(pincode!) \(locality!)" // here i need ZoomMapviewcontroller valuew in row

}
}

请帮我写代码，我卡在这里很久了

Answer 1

这里有两种方法..

第一种方法是假设您在 AddAddressViewController 中正确设置了 DataEnteredDelegate。您的错误是，您在 navigationController 堆栈中已存在的 AddAddressViewcontroller 实例中调用委托方法，并再次将新的 AddAddressViewcontroller 推入该堆栈。

第二种方法，如果你真的想再次将一个新的 AddAddressViewController 实例推送到 navigationController 堆栈（这对我来说是不必要的）。

第一种方法：- 您的 navigationController 堆栈中已经有一个 AddAddressViewController 实例。所以你只需要弹回那个视图控制器。因此，您在 NewZoomAddressViewController 中的 confirmBtn 操作将是：-

@IBAction func confirmBtn(_ sender: Any) {

    guard
        let zipName = zipName,
        let sublocalityName = sublocalityName,
        let localityName = localityName
    else { return }

    if let viewControllers = self.navigationController?.viewControllers {
        for aViewController in viewControllers {
            if aViewController.isKind(of: AddAddressViewController.self) {
                let addAddressVC = aViewController as? AddAddressViewController
                let enteredData = DataEnteredModelSave(pinCode: zipName, streetField: sublocalityName, cityField: localityName)
                delegate?.userDidEnterInformation(info: enteredData)
                self.navigationController?.popToViewController(aViewController, animated: true)
                break
            }
        }
    }
}

第二种方法：- 在这种情况下，不需要委托。您可以直接将 zipName、sublocalityName 和 localityName 传递给新的 AddAddressViewController。

@IBAction func confirmBtn(_ sender: Any) {

    let viewController = self.storyboard?.instantiateViewController(withIdentifier: "AddAddressViewController") as! AddAddressViewController
    guard
        let zipName = zipName,
        let sublocalityName = sublocalityName,
        let localityName = localityName
        else { return }
    viewController.city = localityName
    viewController.pincode = zipName
    viewController.locality = localityName
    self.navigationController?.pushViewController(viewController, animated: true)
}