将坐标转换为城市名称？ [英] Convert coordinates to City name?

问题描述

如何使用MapKit从坐标获取地址？

How to get an address from coordinates using MapKit?

当我在地图上长按它得到坐标时，我有这段代码：

I have this code when long press on the map it gets the coordinates:

func didLongPressMap(sender: UILongPressGestureRecognizer) {

    if sender.state == UIGestureRecognizerState.Began {
        let touchPoint = sender.locationInView(self.mapView)
        let touchCoordinate = self.mapView.convertPoint(touchPoint, toCoordinateFromView: self.mapView)
        var annotation = MKPointAnnotation()
        annotation.coordinate = touchCoordinate
        annotation.title = "Your position"
        self.mapView.addAnnotation(annotation) //drops the pin
        println("lat:  \(touchCoordinate.latitude)")
        var num = (touchCoordinate.latitude as NSNumber).floatValue
        var formatter = NSNumberFormatter()
        formatter.maximumFractionDigits = 4
        formatter.minimumFractionDigits = 4
        var str = formatter.stringFromNumber(num)
        println("long: \(touchCoordinate.longitude)")
        var num1 = (touchCoordinate.longitude as NSNumber).floatValue
        var formatter1 = NSNumberFormatter()
        formatter1.maximumFractionDigits = 4
        formatter1.minimumFractionDigits = 4
        var str1 = formatter1.stringFromNumber(num1)
        self.adressLoLa.text = "\(num),\(num1)"
                }
}

我要打印 annotation.title 完整地址（街道，城市，邮编，国家）。

and I want to print in annotation.title the complete address (street, city, zip, country).

推荐答案

---

SWIFT 4.0：编辑

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MapKit 框架提供了一种从坐标获取地址详细信息的方法。

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SWIFT 4.0 : EDIT

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MapKit framework does provide a way to get address details from coordinates.

您需要使用地图工具包的反向地理编码。 CLGeocoder class用于从位置（坐标）获取地址和地址的位置。方法 reverseGeocodeLocation 将从坐标返回地址详细信息。

You need to use reverse geocoding of map kit. CLGeocoder class is used to get the location from address and address from the location (coordinates). The method reverseGeocodeLocation will returns the address details from coordinates.

此方法接受 CLLocation 作为参数并返回 CLPlacemark ，其中包含地址字典。

This method accepts CLLocation as a parameter and returns CLPlacemark, which contains address dictionary.

所以现在上面的方法将更新为：

So now above method will be updated as:

@objc func didLongPressMap(sender: UILongPressGestureRecognizer) {

    if sender.state == UIGestureRecognizerState.began {
        let touchPoint = sender.location(in: mapView)
        let touchCoordinate = mapView.convert(touchPoint, toCoordinateFrom: self.mapView)
        let annotation = MKPointAnnotation()
        annotation.coordinate = touchCoordinate
        annotation.title = "Your position"
        mapView.addAnnotation(annotation) //drops the pin
        print("lat:  \(touchCoordinate.latitude)")
        let num = touchCoordinate.latitude as NSNumber
        let formatter = NumberFormatter()
        formatter.maximumFractionDigits = 4
        formatter.minimumFractionDigits = 4
        _ = formatter.string(from: num)
        print("long: \(touchCoordinate.longitude)")
        let num1 = touchCoordinate.longitude as NSNumber
        let formatter1 = NumberFormatter()
        formatter1.maximumFractionDigits = 4
        formatter1.minimumFractionDigits = 4
        _ = formatter1.string(from: num1)
        self.adressLoLa.text = "\(num),\(num1)"

        // Add below code to get address for touch coordinates.
        let geoCoder = CLGeocoder()
        let location = CLLocation(latitude: touchCoordinate.latitude, longitude: touchCoordinate.longitude)
        geoCoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in

            // Place details
            var placeMark: CLPlacemark!
            placeMark = placemarks?[0]

            // Location name
            if let locationName = placeMark.location {
                print(locationName)
            }
            // Street address
            if let street = placeMark.thoroughfare {
                print(street)
            }
            // City
            if let city = placeMark.subAdministrativeArea {
                print(city)
            }
            // Zip code
            if let zip = placeMark.isoCountryCode {
                print(zip)
            }
            // Country
            if let country = placeMark.country {
                print(country)
            }
        })
    }
}

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