如何在iOS中的两个位置之间获取路线? [英] How to get route between two locations in iOS?

问题描述

我想使用Google API在两个CLLocationCoordinates之间绘制路线.目前，我正在使用" https://maps.googleapis.com/maps/api/directions/json ?"与起源和目的地，这不完全是我想要做的.我想传递我的位置而不是位置名称，然后进行路由.

I want to draw route between two CLLocationCoordinates Using Google API. Currently i am using "https://maps.googleapis.com/maps/api/directions/json?" with origin and destination and it is not exactly what i want to do. I want to pass my location instead of location name and then make a route.

预先感谢.

推荐答案

我关注了这 Google Maps SDK教程.并且在该路线用户指南中，必须将两个位置名称都添加到alertView中.但是我对代码进行了一些修改，以便您可以直接获取从使用者的当前位置到输入的目的地位置的路线.

I followed THIS tutorial for Google Maps SDK. And In that tutorial for route user have to add both location name into alertView. But I made some modification into the code so you can directly get the route from use's current location to entered destination location.

首先以这种方式从observeValueForKeyPath方法的用户当前位置获取位置名称:

First of all get the name of the location from user's current location in observeValueForKeyPath method this way:

var currentLocationName = String()
override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
    if !didFindMyLocation {
        let myLocation: CLLocation = change[NSKeyValueChangeNewKey] as! CLLocation
        let geoCoder = CLGeocoder()
        let location = CLLocation(latitude: myLocation.coordinate.latitude, longitude: myLocation.coordinate.longitude)

        geoCoder.reverseGeocodeLocation(location, completionHandler: { (placemarks, error) -> Void in
            let placeArray = placemarks as? [CLPlacemark]

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

            // Address dictionary
            println(placeMark.addressDictionary)

            // Location name
            if let locationName = placeMark.addressDictionary["Name"] as? NSString {
                println(locationName)
            }

            // Street address
            if let street = placeMark.addressDictionary["Thoroughfare"] as? NSString {
                println(street)
            }

            // City
            if let city = placeMark.addressDictionary["City"] as? NSString {
                //get city name.
                self.currentLocationName = city as String
                println(city)
            }

            // Zip code
            if let zip = placeMark.addressDictionary["ZIP"] as? NSString {
                println(zip)
            }

            // Country
            if let country = placeMark.addressDictionary["Country"] as? NSString {
                println(country)
            }

        })
        viewMap.camera = GMSCameraPosition.cameraWithTarget(myLocation.coordinate, zoom: 10.0)
        viewMap.settings.myLocationButton = true

        didFindMyLocation = true
    }
}

现在在createRoute方法中给出城市名称或您想要的名称，如下所示:

Now in createRoute method give that city name or what ever you want as origin like this:

@IBAction func createRoute(sender: AnyObject) {

    let addressAlert = UIAlertController(title: "Create Route", message: "Connect locations with a route:", preferredStyle: UIAlertControllerStyle.Alert)

    addressAlert.addTextFieldWithConfigurationHandler { (textField) -> Void in
        //give a origin for route
        textField.text = self.currentLocationName
        textField.userInteractionEnabled = false
    }

    addressAlert.addTextFieldWithConfigurationHandler { (textField) -> Void in
        textField.placeholder = "Destination?"
    }


    let createRouteAction = UIAlertAction(title: "Create Route", style: UIAlertActionStyle.Default) { (alertAction) -> Void in
        let origin = (addressAlert.textFields![0] as! UITextField).text as String
        let destination = (addressAlert.textFields![1] as! UITextField).text as String

        self.mapTasks.getDirections(origin, destination: destination, waypoints: nil, travelMode: nil, completionHandler: { (status, success) -> Void in
            if success {
                self.configureMapAndMarkersForRoute()
                self.drawRoute()
                self.displayRouteInfo()
            }
            else {
                println(status)
            }
        })
    }

    let closeAction = UIAlertAction(title: "Close", style: UIAlertActionStyle.Cancel) { (alertAction) -> Void in

    }

    addressAlert.addAction(createRouteAction)
    addressAlert.addAction(closeAction)

    presentViewController(addressAlert, animated: true, completion: nil)
}

希望有帮助.

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