Swift中的反向地理编码位置 [英] Reverse Geocode Location in Swift

问题描述

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

My input is a latitude and longitude. I need to use the reverseGeocodeLocation function of swift, to give me the output of the locality. The code I have tried to use is

            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")
                }

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

似乎 CLLocationCoordinate2DMake 函数失败，然后导致 reverseGeocodeLocation 函数中的致命错误。我有没有把格式搞砸了？

It seems that the CLLocationCoordinate2DMakefunction is failing, which then causes the fatal error in the reverseGeocodeLocation function. Have I mucked up the format somewhere?

推荐答案

你永远不会反转地理编码的位置但你传入了manager.location。

you never reverse geocode the location but you pass in manager.location.

参见：
CLGeocoder（）。reverseGeocodeLocation（manager.location，...

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

I assume that was a copy&paste mistake and that this is the issue - the code itself looks good - almost ;)

    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)

        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")
        }
    })

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