swift - 如何用 Swift 中 MKMapView 中下一个视图控制器的新值替换旧值?
问题描述
我有两个地图视图控制器,在第一个视图控制器中,我正在获取当前位置并自动填充一些值并将它们显示在相关的文本字段中。
在第二个视图控制器中,我正在搜索新位置并将其位置值发送到第一个视图控制器,DataEnteredDelegate
现在使用方法如何替换第一个视图控制器中当前位置值中的委托方法值。
在这里我得到第二个视图控制器值:
func userDidEnterInformation(info: [String]) {
print("zoom map address viewcontroller data \(info)")
}
印刷:zoom map address viewcontroller data '["560066", "Auto Nagar", "Bangalore"]'
如何 在第一个视图控制器中替换560066
inself.pincodeField.text
和Auto Nagar
inself.streetField.text
和Bangalore
inself.cityField.text
第一个视图控制器代码:
class ProfileAddressViewController: UIViewController, CLLocationManagerDelegate, UISearchBarDelegate, DataEnteredDelegate {
@IBOutlet weak var pincodeField: UITextField!
@IBOutlet weak var cityField: UITextField!
@IBOutlet weak var streetField: UITextField!
@IBOutlet weak var storeNoField: UITextField!
@IBOutlet weak var colonyField: UITextField!
@IBOutlet weak var landmarkField: UITextField!
@IBOutlet weak var mapView: MKMapView!
let annotation = MKPointAnnotation()
let locationManager = CLLocationManager()
var latitude: String?
var logitude: String?
override func viewDidLoad() {
super.viewDidLoad()
self.locationManager.requestAlwaysAuthorization()
if CLLocationManager.locationServicesEnabled() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.startUpdatingLocation()
}
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.navigationBar.isHidden=true;
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.triggerTouchAction(_:)))
mapView.addGestureRecognizer(tapGesture)
}
@objc func triggerTouchAction(_ sender: UITapGestureRecognizer) {
print("Please Help!")
let viewController = self.storyboard?.instantiateViewController(withIdentifier: "NewZoomAddressViewController") as! NewZoomAddressViewController;
viewController.delegate = self
viewController.zipName = self.pincodeField.text
viewController.sublocalityName = self.colonyField.text
viewController.localityName = self.cityField.text
self.navigationController?.pushViewController(viewController, animated: true);
}
func userDidEnterInformation(info: [String]) {
print("zoom map address viewcontroller data \(info)")
}
@IBAction func submitButtonClicked(_ sender: UIButton) {
self.view.endEditing(true)
let viewController = self.storyboard?.instantiateViewController(withIdentifier: "NewZoomAddressViewController") as! NewZoomAddressViewController;
self.navigationController?.pushViewController(viewController, animated: true);
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error)
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
guard let _: CLLocationCoordinate2D = manager.location?.coordinate else { return }
let userLocation :CLLocation = locations[0] as CLLocation
latitude = "\(userLocation.coordinate.latitude)"
logitude = "\(userLocation.coordinate.longitude)"
let geocoder = CLGeocoder()
geocoder.reverseGeocodeLocation(userLocation) { (placemarks, error) in
if (error != nil){
print("error in reverseGeocode")
}
let placemark = placemarks! as [CLPlacemark]
if placemark.count>0{
let placemark = placemarks![0]
print(placemark.administrativeArea!)
print(placemark.country!)
let placemarkDictonary: NSDictionary=placemark.addressDictionary as! NSDictionary
self.pincodeField.text=placemarkDictonary["ZIP"] as? String
self.cityField.text=placemarkDictonary["City"] as? String
self.streetField.text=placemarkDictonary["Street"] as? String
self.colonyField.text=placemarkDictonary["SubLocality"] as? String
self.landmarkField.text=placemarkDictonary["SubThoroughfare"] as? String
}
}
let center = CLLocationCoordinate2D(latitude: userLocation.coordinate.latitude, longitude: userLocation.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
mapView.setRegion(region, animated: true)
// Drop a pin at user's Current Location
let myAnnotation: MKPointAnnotation = MKPointAnnotation()
myAnnotation.coordinate = CLLocationCoordinate2DMake(userLocation.coordinate.latitude, userLocation.coordinate.longitude);
myAnnotation.title = "Current location"
mapView.addAnnotation(myAnnotation)
locationManager.stopUpdatingLocation()
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
switch status {
case .notDetermined:
print("User still thinking")
case .denied:
print("User hates you")
case .authorizedWhenInUse:
locationManager.stopUpdatingLocation()
case .authorizedAlways:
locationManager.startUpdatingLocation()
case .restricted:
print("User dislikes you")
}
}
}
下一个视图控制器代码:
protocol DataEnteredDelegate: class {
func userDidEnterInformation(info: [String])
}
class NewZoomAddressViewController: UIViewController {
weak var delegate: DataEnteredDelegate? = nil
var userModel : ProfileModel?
var zipName: String?
var localityName: String?
var sublocalityName: String?
@IBOutlet weak var mapView: MKMapView!
@IBOutlet weak var addressLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
print("in Zoom map VC")
mapView.delegate = self
addressLabel.text = "\(self.sublocalityName!) \(localityName!) \(self.zipName!)"
}
@IBAction func confirmBtn(_ sender: Any) {
delegate?.userDidEnterInformation(info: [zipName!,sublocalityName!, localityName!])
self.navigationController?.popViewController(animated: true)
}
解决方案
你快到了。只需将值设置为userDidEnterInformation(:)
func 中的文本字段:
func userDidEnterInformation(info: [String]) {
self.pincodeField.text = info[0]
self.streetField.text = info[1]
self.cityField.text = info[2]
}
但是,使用数字访问字符串数组下标可能会导致错误,我建议您使用以下方法:
- 您应该为返回的信息定义类似模型的东西,而不是使用字符串数组。我建议您在某处添加以下结构:
struct DataEnteredModel {
let pinCode: String
let streetField: String
let cityField: String
}
将委托方法中的函数类型从更改
func userDidEnterInformation(info: [String])
为func userDidEnterInformation(info: DataEnteredModel)
在
confirmBtn(_:9
中,以这种方式调用委托函数:
@IBAction func confirmBtn(_ sender: Any) {
guard
let zipName = zipName,
let sublocalityName = sublocalityName,
let localityName = localityName
else { return }
let enteredData = DataEnteredModel(pinCode: zipName, streetField: sublocalityName, cityField: localityName)
delegate?.userDidEnterInformation(info: enteredData)
}
- 最后,在你的
userDidEnterInformation
方法中ProfileAddressViewController
你必须这样做:
func userDidEnterInformation(info: DataEnteredModel) {
self.pincodeField.text = info.pinCode
self.streetField.text = info.streetField
self.cityField.text = info.cityField
}
应该是这样的,有问题的欢迎提问!
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