Question

我在MKMapView中使用MKLocalSearch ..我正在实施如下

extension MYClass: SendLocationDelegate{

    func sendCoOrdinates(loccoordinate:CLLocation, placemark:CLPlacemark){

        println(" Google VC coordinate is as \(loccoordinate.coordinate.longitude) \(loccoordinate.coordinate.latitude)")
        let location:CLLocationCoordinate2D = CLLocationCoordinate2D(latitude:loccoordinate.coordinate.latitude, longitude: loccoordinate.coordinate.longitude)
        let theSpan : MKCoordinateSpan = MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta:0.01)
        let theRegion : MKCoordinateRegion = MKCoordinateRegion(center: location, span: theSpan)
        self.mapView.setRegion(theRegion, animated: false)

        let request = MKLocalSearchRequest()
        request.region = mapView.region
        let search = MKLocalSearch(request: request)

        search.startWithCompletionHandler({(response: MKLocalSearchResponse!,
            error: NSError!) in

            if error != nil {
                println("Error occured in search: \(error.localizedDescription)")

            } else if response.mapItems.count == 0 {

                println("No matches found")

            } else {

                println("Matches found")

                println("\(response)")

            }
        })



    }


}

输出：Google VC坐标为72.8561644 19.0176147 搜索中出错：无法完成操作。（MKErrorDomain错误1。）为什么会发生这种情况？

已编辑：但是当我将请求更改为

时

let request = MKLocalSearchRequest()
 request.naturalLanguageQuery = "india"
 //request.region = mapView.region
 let search = MKLocalSearch(request: request)

我得到了良好的回应

{ boundingRegion =＆＃34;＆＃34 ;; mapItems =（＆＃34; {\ n isCurrentLocation = 0; \ n name = India; \ n placemark = \＆＃34; India，India @ 1 + 23.04117260，+ 78.89180550＆GT; +/- 0.00m，区域CLCircularRegion （标识符：＆＃39;＆lt; + 21.84329084，+ 82.78786665＆gt; radius 2237301.34＆＃39;， center：＆lt; + 21.84329084，+ 82.78786665＆gt ;, radius：2237301.34m）\＆＃34 ;; \ n}＆＃34; ）; }

Answer 1

一切都工作得很好。只是你在没有包含naturalLanguageQuery的请求时犯了一个错误

 let request = MKLocalSearchRequest()
 request.region = mapView.region
 let search = MKLocalSearch(request: request)

在这种情况下，request.naturalLanguageQuery被设置为nil ....所以你得到（MKErrorDomain错误1）未知类型。查看Apple文档here naturalLanguageQuery不能包含nil值...所以用它来提出请求

let request = MKLocalSearchRequest()
 request.naturalLanguageQuery = "india"
 let search = MKLocalSearch(request: request)

您可以使用region参数将搜索结果列表缩小到指定区域内或附近的搜索结果列表。指定区域并不能保证结果全部都在区域内。这只是搜索引擎的一个提示。所以region可以在这里作为选项。或者你可以提出更好的结果请求

let request = MKLocalSearchRequest()
request.naturalLanguageQuery = "india"
request.region = mapView.region
let search = MKLocalSearch(request: request)

如何在MKMapView中使用MKLocalSearch

1 个答案: