ios - MapKit LocalSearch无法正常工作

我做了一个简单的函数来执行本地搜索

func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
    var localSearchRequest:MKLocalSearchRequest!
    var localSearchResponse:MKLocalSearchResponse!
    localSearchRequest.naturalLanguageQuery = locationSearchBar.text
    let localSearch = MKLocalSearch(request: localSearchRequest)
    localSearch.start { (localSearchResponse, Error) in
        if localSearchResponse == nil{
            let alertController = UIAlertController(title: nil, message: "No Place Found", preferredStyle: UIAlertControllerStyle.alert)
            alertController.addAction(UIAlertAction(title: "확인", style: UIAlertActionStyle.default, handler: nil))
            self.present(alertController, animated: true, completion: nil)
            return
        }
            self.pointAnnotation = MKPointAnnotation()
            self.pointAnnotation.title = self.locationSearchBar.text
            self.pointAnnotation.coordinate = CLLocationCoordinate2D(latitude:localSearchResponse!.boundingRegion.center.latitude, longitude: localSearchResponse!.boundingRegion.center.longitude)


            self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation, reuseIdentifier: nil)
            self.mapView.centerCoordinate = self.pointAnnotation.coordinate
            self.mapView.addAnnotation(self.pinAnnotationView.annotation!)



    }
}

但它不起作用
它会转到localSearchRequest.naturalLanguageQuery = locationSearchBar.text行上的“Thread 1 EXC_BAD_INSTRUCTION”，每次搜索时它都会显示“No Place Found”

最佳答案

问题是您没有初始化您刚刚声明的localSearchResponse。
更改行：

var localSearchResponse:MKLocalSearchResponse!

与

var localSearchResponse = MKLocalSearchResponse()

关于ios - MapKit LocalSearch无法正常工作，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43302117/