ios Swift 中的反向地理编码位置
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Reverse Geocode Location in Swift
提问by TimWhiting
My input is a latitude and longitude. I need to use the reverseGeocodeLocationfunction of swift, to give me the output of the locality. The code I have tried to use is
我的输入是纬度和经度。我需要使用reverseGeocodeLocationswift的功能，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")
}
in the logs I get
在我得到的日志中
//-122.0312186
//37.33233141
//C.CLLocationCoordinate2D
//fatal error: unexpectedly found nil while unwrapping an Optional value
It seems that the CLLocationCoordinate2DMakefunction is failing, which then causes the fatal error in the reverseGeocodeLocationfunction. Have I mucked up the format somewhere?
似乎CLLocationCoordinate2DMake函数失败了，然后导致reverseGeocodeLocation函数中的致命错误。我在某处搞砸了格式吗？
回答by Daij-Djan
you never reverse geocode the location but you pass in manager.location.
您永远不会对位置进行反向地理编码，但您会传入 manager.location。
see:
CLGeocoder().reverseGeocodeLocation(manager.location, ...
看：
CLGeocoder().reverseGeocodeLocation(manager.location, ...
I assume that was a copy&paste mistake and that this is the issue - the code itself looks good - almost ;)
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;）
working code
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)
})
