地理編碼地址不返回正確的座標

我想從地址字符串獲取座標並將地圖標記放置在我的地圖視圖中，但我沒有從地理編碼器獲取正確的座標。我看到有幾個問題。地理編碼地址不返回正確的座標

一，地圖上的註釋不是它們應該在的地方，因此不能從我的地理編碼器獲得正確的座標。他們應該都相當接近，但他們不是。

二，應該有三個註釋，但只有兩個出現。難道我做錯了什麼？

我的完整方法。我的數據庫目前有經度和緯度，但我試圖避免在那裏，如果我能得到這個工作。

func checkDistanceAndAddPins() { 
     for gym in gyms { 
      var index = 0 

      let gymLatitude = gym["latitude"]!!.doubleValue 
      let gymLongitude = gym["longitude"]!!.doubleValue 
      let gymLocation = CLLocation(latitude: gymLatitude, longitude: gymLongitude) 
      let distance = gymLocation.distanceFromLocation(myLocation!) 
      let distanceInMeters = NSNumber(double: distance) 
      let metersDouble = distanceInMeters.doubleValue 
      let miles = metersDouble * 0.00062137 

      if miles > maxDistance { 
       gyms.removeAtIndex(index) 
      } else { 
       // let location = CLLocationCoordinate2D(latitude: gymLatitude, longitude: gymLongitude) 
       gymAnnotation = GymAnnotation() 
       gymAnnotation!.title = gym["name"] as? String 
       gymAnnotation!.subtitle = gym["address"] as? String 

       let addressString = gym["address"] as? String 
       print("Address: \(addressString)") 

       let geocoder = CLGeocoder() 
       geocoder.geocodeAddressString(addressString!, completionHandler: { 
        (placemarks, error) -> Void in 
        if error != nil { 
         print("Error", error) 
        } 
        if let placemark = placemarks?.first { 
         print(placemark.location!.coordinate) 
         self.gymAnnotation!.coordinate = placemark.location!.coordinate 
        } 
       }) 

       // gymAnnotation!.coordinate = location 
       gymAnnotation!.gymPhoneNumber = gym["phone"] as? String 
       gymAnnotation!.gymID = gym["id"] as? String 
       if let website = gym["website"] as? String { 
        gymAnnotation!.gymWebsite = website 
       } 
       gymLocations.append(gymAnnotation!) 
      } 

      index += 1 
     } 

     if self.gymLocations.count == 0 { 
      let messageString = String(format: "There are no gyms within %.0f miles of your current location. Try changing the search radius.", maxDistance) 
      let noGymsAlert = UIAlertController(title: "", message: messageString, preferredStyle: .Alert) 

      let okAction = UIAlertAction(title: "OK", style: .Default, handler: { 
       (action) -> Void in 
       noGymsAlert.dismissViewControllerAnimated(true, completion: nil) 
      }) 

      let radiusAction = UIAlertAction(title: "Change Radius", style: .Default, handler: { 
       (action) -> Void in 
       noGymsAlert.dismissViewControllerAnimated(true, completion: nil) 
       self.changeSearchDistance() 
      }) 

      noGymsAlert.addAction(radiusAction) 
      noGymsAlert.addAction(okAction) 
      noGymsAlert.view.tintColor = BarItems.greenTintColor 

      self.presentViewController(noGymsAlert, animated: true, completion: nil) 
     } 

     for item in gymLocations { 
      print("gymLocations Coordinates: \(item.coordinate)") 
     } 

     dispatch_async(dispatch_get_main_queue()) { 
      self.gymMap.addAnnotations(self.gymLocations) 
      self.gymMap.showAnnotations(self.gymMap.annotations, animated: true) 
      for item in self.gymMap.annotations { 
       print("annotations: \(item.coordinate)") 
      } 
     } 
    }

我打印語句的結果：

Address: Optional("1753 Bardstown Rd, Louisville, KY 40205") 
Address: Optional("8609 Westport Rd, Louisville, KY 40205") 
Address: Optional("Mid City Mall, 1250 Bardstown Rd, Louisville, KY 40204") 
CLLocationCoordinate2D(latitude: 38.235615099999997, longitude: -85.716183599999994) 
CLLocationCoordinate2D(latitude: 38.22886264358975, longitude: -85.70138458380427) 
CLLocationCoordinate2D(latitude: 38.281753100000003, longitude: -85.593839399999993)

添加打印語句打印每個項目的座標gymLocations：

gymLocations Coordinates: CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0) 
gymLocations Coordinates: CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0) 
gymLocations Coordinates: CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0)

而且添加print語句正確showAnnotations後（）

annotations: CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0) 
annotations: CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0) 
annotations: CLLocationCoordinate2D(latitude: 38.21228, longitude: -85.679669000000004) 
annotations: CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0)

來源

2016-05-13 raginggoat

我的猜測是：'geocodeAddressString（）'是異步的。所以舉個例子，如果你寫了一個日誌，例如當你將註釋附加到'gymLocations'上時記錄，而當你showAnnations（）時你會看到。 – Larme

@Larme看到我的問題的更新。 – raginggoat

問題是：您看到日誌出現的順序是什麼？我仍然認爲你的問題是關於異步的。 – Larme

我通過將for循環中的所有代碼移動到地理編碼完成處理程序來解決此問題

來源

2016-05-13 14:32:02 raginggoat

地理編碼地址不返回正確的座標

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