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，它将转到profileviewcontroller，如果我点击继续，它将转到ZoomMapviewcontroller，这是我确认的信息，那么我需要在标签文本下方显示在AddAddressViewcontroller中添加地址表视图。

ZoomMapviewcontroller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)

}
}

此处介绍如何将zipName，位置，subLocality值w发送到Addaddressviewcontroller表视图

AddAddressViewcontroller 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

}
}

请帮助我编写代码，很长时间以来我一直被困在这里

Answer 1

这里有2种方法。

第一种方法是假设您已在AddAddressViewController中正确设置了DataEnteredDelegate。您的错误是，您正在NavigationController堆栈中已经存在的AddAddressViewcontroller实例中调用委托方法，然后将新的AddAddressViewcontroller再次推入该堆栈中。

第二种方法，如果您确实要（按照我的观点，这是不必要的）将新的AddAddressViewController实例再次推送到navigationController堆栈。

第一种方法：- 您在navigationController堆栈中已经有一个AddAddressViewController实例。因此，您只需要弹出回到该视图控制器。因此，您在NewZoomAddressViewController中的ConfirmBtn操作将为：-

@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，无需委派。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)
}

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？

1 个答案: