使用谷歌地图获取附近的地方

Question

我正在尝试使用谷歌地图来查找我当前位置的附近地点.我在Google Developer Console中创建了一个项目,并获得了"ios APIkey"和"Server APIkey".我还启用了Google Places API和适用于iOS的Google Maps SDK.以下是靠近地方查找的代码.

func fetchPlacesNearCoordinate(coordinate: CLLocationCoordinate2D, radius: Double, name : String){
    var urlString = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?key=\(apiServerKey)&location=\(coordinate.latitude),\(coordinate.longitude)&radius=\(radius)&rankby=prominence&sensor=true"
    urlString += "&name=\(name)"

    urlString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!
    println(urlString)
    if placesTask.taskIdentifier > 0 && placesTask.state == .Running {
        placesTask.cancel()

    }
    UIApplication.sharedApplication().networkActivityIndicatorVisible = true
    placesTask = session.dataTaskWithURL(NSURL(string: urlString)!) {data, response, error in
        println("inside.")
        UIApplication.sharedApplication().networkActivityIndicatorVisible = false
        if let json = NSJSONSerialization.JSONObjectWithData(data, options:nil, error:nil) as? NSDictionary {
            if let results = json["results"] as? NSArray {
                for rawPlace:AnyObject in results {
                    println(rawPlace)
                    self.results.append(rawPlace as! String)
                }
            }
        }
            self.placesTask.resume()
    }
}

传递的坐标是当前位置的坐标.如果我执行上面的代码,没有任何事情发生,但生成的url是有效的.如果我把这个网址放在Google上,我会得到正确的结果.但我的应用程序中没有任何内容 请帮我解决这个问题.请告诉我哪里错了!

Answer 1

您可以将地点添加到结果数组中,但是您已经做了任何更新mapview的操作,例如,向mapview添加标记.

示例代码将标记添加到mapview:

   let returnedPlaces: NSArray? = jsonResult["results"] as? NSArray

  if returnedPlaces != nil {

           for index in 0..<returnedPlaces!.count {

                 if let returnedPlace = returnedPlaces?[index] as? NSDictionary {

                       var placeName = ""
                       var latitude = 0.0
                       var longitude = 0.0

                       if let name = returnedPlace["name"] as? NSString {
                           placeName = name as String
                       }

                       if let geometry = returnedPlace["geometry"] as? NSDictionary {
                           if let location = geometry["location"] as? NSDictionary {
                                 if let lat = location["lat"] as? Double {
                                            latitude = lat
                                 }

                                 if let lng = location["lng"] as? Double {
                                           longitude = lng
                                  }
                            }
                       }

                       let marker = GMSMarker()
                       marker.position = CLLocationCoordinate2DMake(latitude, longitude)
                       marker.title = placeName
                       marker.map = self.mapView
                }
           }
   }

您可以在Swift中看到有关如何使用Google地图获取附近地点的教程.