Swift中的反向地理编码位置[关闭]

Question

我的输入是纬度和经度。我需要使用 swift 的reverseGeocodeLocation 函数，给我本地的输出。我尝试使用的代码是

            println(geopoint.longitude) 
            println(geopoint.latitude)
            var manager : CLLocationManager!
            var longitude :CLLocationDegrees = geopoint.longitude
            var latitude :CLLocationDegrees = geopoint.latitude

            var location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
            println(location)

            CLGeocoder().reverseGeocodeLocation(manager.location, completionHandler: {(placemarks, error) -> Void in
                println(manager.location)

                if error != nil {
                    println("Reverse geocoder failed with error" + error.localizedDescription)
                    return
                }
                if placemarks.count > 0 {
                    let pm = placemarks[0] as CLPlacemark


                    println(pm.locality)
                }


                else {
                    println("Problem with the data received from geocoder")
                }

在我得到的日志中

//-122.0312186
//37.33233141
//C.CLLocationCoordinate2D
//fatal error: unexpectedly found nil while unwrapping an Optional value

CLLocationCoordinate2DMake函数似乎失败了，这导致了reverseGeocodeLocation函数中的致命错误。我是不是把格式搞砸了？

Answer 1

您永远不会对位置进行反向地理编码，但您会传入 manager.location。

见： CLGeocoder().reverseGeocodeLocation(manager.location, ...

我认为这是一个复制和粘贴错误，这就是问题所在 - 代码本身看起来不错 - 几乎 ;)

工作代码

    var longitude :CLLocationDegrees = -122.0312186
    var latitude :CLLocationDegrees = 37.33233141
    
    var location = CLLocation(latitude: latitude, longitude: longitude) //changed!!!
    println(location)
    
    CLGeocoder().reverseGeocodeLocation(location, completionHandler: {(placemarks, error) -> Void in
        println(location)
        guard error == nil else {
            println("Reverse geocoder failed with error" + error.localizedDescription)
            return
        }
        guard placemarks.count > 0 else {
            println("Problem with the data received from geocoder")
            return
        }
        let pm = placemarks[0] as! CLPlacemark
        println(pm.locality)
    })