ios 使用 MapKit - Swift 3.0 向地图添加图钉

Adding Pins to Map using MapKit - Swift 3.0

提问by roguephillips

New coder, trying to figure out how to use MapKit. The goal is to create a map that users can add pins to using their address. However, the step I am at now, I am having trouble figuring out how to add pins to the map at all.

新编码员，试图弄清楚如何使用 MapKit。目标是创建一个地图，用户可以使用他们的地址添加图钉。但是，在我现在的步骤中，我根本无法弄清楚如何向地图添加图钉。

How can I add a pin to the map? I have been struggling to figure out how to use annotations thus far.

如何在地图上添加图钉？到目前为止，我一直在努力弄清楚如何使用注释。

That's what I'm hoping for help/direction with. Thanks!

这就是我希望得到的帮助/指导。谢谢！

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate

{
    @IBOutlet weak var bigMap: MKMapView!

    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.locationManager.delegate = self
        self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
        self.locationManager.requestWhenInUseAuthorization()
        self.locationManager.startUpdatingLocation()
        self.bigMap.showsUserLocation = true

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let location = locations.last
        let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.02, longitudeDelta: 0.02))

        self.bigMap.setRegion(region, animated: true)
        self.locationManager.stopUpdatingLocation()

    }

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print("Errors " + error.localizedDescription)
    }
}

回答by Mislav Javor

They're called annotationsin the MapKit and you instantiate them like so:

它们annotations在 MapKit 中被调用，您可以像这样实例化它们：

let annotation = MKPointAnnotation()

let annotation = MKPointAnnotation()

then in the viewDidLoad()method just set the coordinates and add them to the map like:

然后在viewDidLoad()方法中设置坐标并将它们添加到地图中，如：

annotation.coordinate = CLLocationCoordinate2D(latitude: 11.12, longitude: 12.11)
mapView.addAnnotation(annotation)

The numbers are your coordinates

数字是你的坐标

回答by danner.tech

The way that I learned how to do this is:

我学习如何做到这一点的方法是：

1. In the same function as viewDidLoad(), place the following lines of code:

    let annotation = MKPointAnnotation()
    annotation.title = "Your text here"
    //You can also add a subtitle that displays under the annotation such as
    annotation.subtitle = "One day I'll go here..."
    annotation.coordinate = center 
   

1. 在与 viewDidLoad() 相同的函数中，放置以下代码行：

    let annotation = MKPointAnnotation()
    annotation.title = "Your text here"
    //You can also add a subtitle that displays under the annotation such as
    annotation.subtitle = "One day I'll go here..."
    annotation.coordinate = center 
   

This is the only place I can see where you have a coordinate if all else fails, just add the coordinate (search on Google if you
need to know how to create a coordinate) and set it equal to the
"annotation.coordinate" variable

如果所有其他方法都失败，这是我唯一能看到坐标的地方，只需添加坐标（如果您
需要知道如何创建坐标，请在 Google 上搜索）并将其设置为等于
“annotation.coordinate”变量

map.addAnnotation(annotation)

1. Dassit!

2. 混蛋！