如何在MKLocalSearch中使用MKMapView

Question

我在MKMapView中使用MKLocalSearch。我实现如下

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坐标为72.8561644 19.0176147，搜索中出现错误:操作无法完成。(MKErrorDomain错误1.)为什么会发生这种情况？

编辑:但是，当我将请求更改为

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

我得到了很好的回应

{ boundingRegion = ""；mapItems =(“{\n isCurrentLocation = 0;\n name =印度；\n placemark =\”印度，印度@ <+23.04117260，+78.89180550> +/- 0.00m，区域CLCircularRegion (标识符：‘<+21.84329084，+82.78786665>半径2237301.34'，center:<+21.84329084，+82.78786665>，半径:2237301.34m)\“；\n}

Answer 1

一切正常工作，fine..Just您在请求时犯了一个错误，它不包含naturalLanguageQuery，如

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

在本例中，request.naturalLanguageQuery被设置为nil....so (MKErrorDomain错误1)，在苹果文档中，这里naturalLanguageQuery无法包含type.Look，请使用它发出请求。

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

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都在区域内。这只是对搜索引擎的一个提示。因此，region可以在这里充当可选的角色。或者，您可以要求获得更好的结果，例如

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