Swift 4 Mapview未调用委托方法f
当用户点击距离我位置50米的敌人时,我尝试使用教程from()呈现一个视图控制器。但我的viewcontroller并没有显示,我想我并没有从扩展调用我的委托方法。我怎么修理它? 这是我的代码:Swift 4 Mapview未调用委托方法f,swift,annotations,delegates,mapkit,Swift,Annotations,Delegates,Mapkit,当用户点击距离我位置50米的敌人时,我尝试使用教程from()呈现一个视图控制器。但我的viewcontroller并没有显示,我想我并没有从扩展调用我的委托方法。我怎么修理它? 这是我的代码: import UIKit import MapKit class GoogleMapsViewController: UIViewController, CLLocationManagerDelegate { var targets = [Item]() var locationMana
import UIKit
import MapKit
class GoogleMapsViewController: UIViewController, CLLocationManagerDelegate {
var targets = [Item]()
var locationManager: CLLocationManager!
var userLocation: CLLocation?
@IBOutlet weak var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
mapView.showsUserLocation = true
mapView.mapType = MKMapType(rawValue: 0)!
mapView.userTrackingMode = MKUserTrackingMode(rawValue: 2)!
setupLocations() // Do any additional setup after loading the view.
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
// Check for Location Services
if CLLocationManager.locationServicesEnabled() {
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
locationManager.startUpdatingHeading()
}
}
func setupLocations() {
let pdpk = Item( Place : "Pildammsparken", location: CLLocation(latitude: 55.590105, longitude: 12.988737))
targets.append(pdpk)
let btp = Item( Place : "Bulltoftaparken", location: CLLocation(latitude: 55.601326, longitude: 13.079005))
targets.append(btp) for item in targets {
let annotation = MapA(location: item.location.coordinate, item: item)
self.mapView.addAnnotation(annotation)
}
}
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
defer { userLocation = locations.last }
if userLocation == nil {
// Zoom to user location
if let uLocation = locations.last {
let viewRegion = MKCoordinateRegionMakeWithDistance(uLocation.coordinate, 2000, 2000)
mapView.setRegion(viewRegion, animated: false)
print(uLocation)
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension GoogleMapsViewController: MKMapViewDelegate {
func mapView(_ mapView: MKMapView, didUpdate userLocation: MKUserLocation) {
self.userLocation = userLocation.location
}
func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
//1
let coordinate = view.annotation!.coordinate
//2
if let userCoordinate = userLocation {
//3
if userCoordinate.distance(from: CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude)) < 50 {
//4
print("test")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
if let viewController = storyboard.instantiateViewController(withIdentifier: "ARViewController") as? PlaceViewController {
// more code later
//5
if let mapAnnotation = view.annotation as? MapA {
//6
self.present(viewController, animated: true, completion: nil)
}
}
}
}
}
}
导入UIKit
导入地图套件
类GoogleMapsViewController:UIViewController、CLLocationManagerDelegate{
变量目标=[项目]()
var locationManager:CLLocationManager!
var userLocation:CLLocation?
@ibvar映射视图:MKMapView!
重写func viewDidLoad(){
super.viewDidLoad()
mapView.showsUserLocation=true
mapView.mapType=MKMapType(原始值:0)!
mapView.userTrackingMode=MKUserTrackingMode(原始值:2)!
setupLocations()//加载视图后执行任何其他设置。
locationManager=CLLocationManager()
locationManager.delegate=self
locationManager.desiredAccuracy=KCallocationAccuracyBest
//查看定位服务
如果CLLocationManager.locationServicesEnabled(){
locationManager.RequestWhenUseAuthorization()
locationManager.startUpdatingLocation()
locationManager.startUpdatingHeading()
}
}
func setupLocations(){
设pdpk=项目(地点:“Pildammsparken”,地点:CLLocation(纬度:55.590105,经度:12.988737))
targets.append(pdpk)
设btp=项目(地点:“Bulltoftaparken”,地点:CLLocation(纬度:55.601326,经度:13.079005))
目标。为目标中的项目追加(btp){
let annotation=MapA(位置:item.location.coordinate,item:item)
self.mapView.addAnnotation(注释)
}
}
func locationManager(manager:CLLocationManager,didUpdateLocations位置:[CLLocation]){
延迟{userLocation=locations.last}
如果userLocation==nil{
//缩放到用户位置
如果let uLocation=locations.last{
让viewRegion=MKCoordinateRegionMakeWithDistance(uLocation.coordinate,2000,2000)
mapView.setRegion(viewRegion,动画:false)
印刷品(位置)
}
}
}
重写函数didReceiveMemoryWarning(){
超级。我收到了记忆警告()
//处置所有可以重新创建的资源。
}
}
扩展GoogleMapsViewController:MKMapViewDelegate{
func映射视图(uMapView:MKMapView,didUpdate用户位置:MKUserLocation){
self.userLocation=userLocation.location
}
func映射视图(uMapView:MKMapView,didSelect视图:MKAnnotationView){
//1
让坐标=视图。注释!。坐标
//2
如果让userCoordinate=userLocation{
//3
如果userCoordinate.distance(from:CLLocation(纬度:坐标.纬度,经度:坐标.经度))<50{
//4
打印(“测试”)
let storyboard=UIStoryboard(名称:“Main”,捆绑包:nil)
如果让viewController=storyboard.instanceeviewcontroller(标识符为“ARViewController”)作为?PlaceViewController{
//稍后会有更多代码
//5
如果让mapAnnotation=view.annotation为?MapA{
//6
self.present(viewController,动画:true,完成:nil)
}
}
}
}
}
}
您必须在viewDidLoad
mapView.delegate = self
舒可汗是绝对正确的
您还可以控制拖动到左侧的视图控制器图标,并从弹出菜单中选择“委派”。您还可以为表、选择器等对象设置数据源。您可以通过两种方式设置委托
mapview.delegate=self
这起作用了!我在其他地方看过,这到底是做什么的?