swift 将文本字段中的数据传递到地图视图
swift passing data in textfield to mapview
我正在制作一个应用程序来搜索位置。它包含一个VC(viewcontroller)来显示搜索记录。
Q1。如何在文本字段中获取输入并在地图视图中显示位置?
Q2。我无法解除 viewcontroller。我已经完成了情节提要中的代码和连线。但是还是什么都不做
Q3.如何在单击按钮时将 VC A 中的文本字段中的数据传递到 VC B 中的表格视图?
还是我做错了?
代码:
@IBAction func unwind(segue: UIStoryboardSegue) {
viewController?.dismiss(animated: true)
self.performSegue(withIdentifier: "unwindToMap", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
//Check for Location Services
if (CLLocationManager.locationServicesEnabled()) {
myLocationManager = CLLocationManager()
myLocationManager.delegate = mapViewDelegate as? CLLocationManagerDelegate
myLocationManager.desiredAccuracy = kCLLocationAccuracyBest
myLocationManager.requestAlwaysAuthorization()
myLocationManager.requestWhenInUseAuthorization()
}
mapViewDelegate = searchBox.text as? MKMapViewDelegate
}
@IBAction func searchButtonClick(_ sender: Any) {
let location = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
let span = MKCoordinateSpanMake(0.005, 0.005)
let region = MKCoordinateRegion(center: location, span: span)
let annotation = MKPointAnnotation()
annotation.coordinate = location
annotation.title = searchBox.text!
/*
//find the words
let _ : UITextPosition = searchBox.beginningOfDocument
let _ : UITextPosition = searchBox.endOfDocument
let _ : UITextRange = searchBox.selectedTextRange!
// Get cursor position
if let selectedRange = searchBox.selectedTextRange {
_ = searchBox.offset(from: searchBox.beginningOfDocument, to: selectedRange.start)
}
searchBox.selectedTextRange = searchBox.textRange(
from: searchBox.beginningOfDocument, to: searchBox.endOfDocument)
*/
// myMapView.add(location as! MKOverlay)
myMapView.addAnnotation(annotation)
myMapView.setRegion(region, animated: true)
}
如果您的回答有用,我将不胜感激。
编辑:
(2019 年 7 月 24 日)还有更好的答案吗?虽然我已经重现了这个问题。
欢迎回答更多,供大家参考。
要将数据从一个屏幕传递到另一个屏幕,您可以使用结构
喜欢:
struct Manager
{
static var tfText : String = ""
}
从任何地方更新其内容使用
Manager.tfText = textField.text!
检索数据同上
let variable : String = Manager.tfText
您可以使用导航控制器来弹出控制器,如果需要使用展开,您是否连接了源vc以在故事板中展开转场
对于当前位置,您可以使用以下代码:
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation:CLLocation = locations[0] as CLLocation
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)
}
我正在制作一个应用程序来搜索位置。它包含一个VC(viewcontroller)来显示搜索记录。
Q1。如何在文本字段中获取输入并在地图视图中显示位置?
Q2。我无法解除 viewcontroller。我已经完成了情节提要中的代码和连线。但是还是什么都不做
Q3.如何在单击按钮时将 VC A 中的文本字段中的数据传递到 VC B 中的表格视图?
还是我做错了?
代码:
@IBAction func unwind(segue: UIStoryboardSegue) {
viewController?.dismiss(animated: true)
self.performSegue(withIdentifier: "unwindToMap", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
//Check for Location Services
if (CLLocationManager.locationServicesEnabled()) {
myLocationManager = CLLocationManager()
myLocationManager.delegate = mapViewDelegate as? CLLocationManagerDelegate
myLocationManager.desiredAccuracy = kCLLocationAccuracyBest
myLocationManager.requestAlwaysAuthorization()
myLocationManager.requestWhenInUseAuthorization()
}
mapViewDelegate = searchBox.text as? MKMapViewDelegate
}
@IBAction func searchButtonClick(_ sender: Any) {
let location = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
let span = MKCoordinateSpanMake(0.005, 0.005)
let region = MKCoordinateRegion(center: location, span: span)
let annotation = MKPointAnnotation()
annotation.coordinate = location
annotation.title = searchBox.text!
/*
//find the words
let _ : UITextPosition = searchBox.beginningOfDocument
let _ : UITextPosition = searchBox.endOfDocument
let _ : UITextRange = searchBox.selectedTextRange!
// Get cursor position
if let selectedRange = searchBox.selectedTextRange {
_ = searchBox.offset(from: searchBox.beginningOfDocument, to: selectedRange.start)
}
searchBox.selectedTextRange = searchBox.textRange(
from: searchBox.beginningOfDocument, to: searchBox.endOfDocument)
*/
// myMapView.add(location as! MKOverlay)
myMapView.addAnnotation(annotation)
myMapView.setRegion(region, animated: true)
}
如果您的回答有用,我将不胜感激。
编辑:
(2019 年 7 月 24 日)还有更好的答案吗?虽然我已经重现了这个问题。
欢迎回答更多,供大家参考。
要将数据从一个屏幕传递到另一个屏幕,您可以使用结构
喜欢:
struct Manager
{
static var tfText : String = ""
}
从任何地方更新其内容使用
Manager.tfText = textField.text!
检索数据同上
let variable : String = Manager.tfText
您可以使用导航控制器来弹出控制器,如果需要使用展开,您是否连接了源vc以在故事板中展开转场
对于当前位置,您可以使用以下代码:
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let userLocation:CLLocation = locations[0] as CLLocation
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)
}