为什么MKLocalSearch在不同城市寻找"nearby restaurants"返回地点？

Question

我正在构建一个简单的应用程序，允许用户保存他们的位置以供以后使用。

目标：用户在商家时固定其地址，我们保存商家名称

我的方法：我正在向位置管理器请求位置。然后，我将 CLLocation 反向地理编码为 CLPlacemark。由于地标无法识别公司名称，因此我开始MKLocal搜索"附近的餐馆"。response.mapItems 返回的是完全不同的城市中的位置。

我已经指定了区域并验证了地标是否正确返回了用户的地址。所以，我相信问题出在MKLocalSearch上。

为什么它会返回不同城市的结果？

已更新：来自视图控制器的所有代码

class ViewController: UIViewController {
let locationManager = CLLocationManager()
var places = [MKMapItem]()
let naturalLanguageQuery = "closest places to eat"
let queries = ["restaurants", "places to eat", "breakfast", "lunch", "dinner"]
override func viewDidLoad() {
super.viewDidLoad()
//  Do any additional setup after loading here
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if CLLocationManager.authorizationStatus() == .notDetermined {
locationManager.requestWhenInUseAuthorization()
}
}
@IBAction func getLocation() {
if CLLocationManager.authorizationStatus() == .authorizedWhenInUse {
locationManager.requestLocation()
}
}
func add(placemark: CLPlacemark) {
search(placemark: placemark, index: self.queries.count - 1)
}
func searchCompleted(placemark: CLPlacemark) {
guard let foo = Scraper.shared.sortByDistance(userPlacemark: placemark, items: places) else { return }
for item in Scraper.shared.filterForUnique(items: foo) {
print(item)
if item.placemark.addressString == placemark.addressString {
}
}
}
func search(placemark: CLPlacemark, index: Int) {
let request = MKLocalSearchRequest()
guard let coordinate = placemark.location?.coordinate else { return }
request.region = MKCoordinateRegionMakeWithDistance(coordinate, 1600, 1600)
request.naturalLanguageQuery = queries[index]
MKLocalSearch(request: request).start { (response, error) in
guard error == nil else { return }
guard let response = response else { return }
guard response.mapItems.count > 0 else { return }
for item in response.mapItems {
self.places.append(item)
}
if index != 0 {
self.search(placemark: placemark, index: index - 1)
} else {
self.searchCompleted(placemark: placemark)
}
}
}
}
extension ViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let geocoder = CLGeocoder()
if let loc = locations.last {
geocoder.reverseGeocodeLocation(loc) { (placemarks, error) in
if let error = error {
print("error")
} else {
if let placemark = placemarks?.first {
print(placemark.debugDescription)
self.add(placemark: placemark)
}
}
}
}
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
print(error.localizedDescription)
}
}

Answer 1

给定你的代码，你的逻辑似乎是正确的，但根据位置的不同，你可能无法得到你想要的。 苹果公司为MKCoordinateRegion编写的文档指出，"指定一个区域并不能保证结果都将在区域内。它只是对搜索引擎的一个提示。MKLocal搜索文档