【发布时间】：2016-08-19 06:15:57
【问题描述】：
我正试图找出方法来限制我向 CLGeocoder 发出的请求数量，因为我一直在超出最大限制。我得到“Error Domain=kCLErrorDomain Code = 2 "(null)”。基本上，每次有人在 func regionDidChangeAnimated 中移动地图时，我都会得到他们确定的坐标，地理编码以获得城市/state 然后点击我的 API，然后使用这些结果对该区域的新地图图钉进行地理编码。有没有人有任何最佳实践来处理这种情况？非常感谢任何帮助。
查看用户是否更改地图区域的功能：
private func mapViewRegionDidChangeFromUserInteraction() -> Bool {
let view: UIView = self.mapView.subviews[0] as UIView
// Look through gesture recognizers to determine whether this region change is from user interaction
if let gestureRecognizers = view.gestureRecognizers {
for recognizer in gestureRecognizers {
if( recognizer.state == UIGestureRecognizerState.Began || recognizer.state == UIGestureRecognizerState.Ended ) {
return true
}
}
}
return false
}
func mapView(mapView: MKMapView, regionWillChangeAnimated animated: Bool) {
mapChangedFromUserInteraction = mapViewRegionDidChangeFromUserInteraction()
if (mapChangedFromUserInteraction) {
// user changed map region
}
}
func mapView(mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
if (mapChangedFromUserInteraction) {
// user changed map region
let center = mapView.centerCoordinate
let mapLatitude = center.latitude
let mapLongitude = center.longitude
let locationmove = CLLocation(latitude: mapLatitude, longitude: mapLongitude)
CLGeocoder().reverseGeocodeLocation(locationmove) { (placemarks, error) in
if (error != nil){
print(error)
}else {
if let p = placemarks?[0]{
let locality = p.locality ?? ""
let administrativeArea = p.administrativeArea ?? ""
self.mappedCity = String(locality)
self.mappedState = String(administrativeArea)
self.parseJSON("\(locality)", state: "\(administrativeArea)")
}
}
}
}
}
从地理编码结果中解析 JSON 的功能：
func parseJSON(city: String, state: String){
let passedCity = city
let passedState = state
let escapedCity = passedCity.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
let escapedState = passedState.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
let url = NSURL(string:"http://www.API.com/api.php?city=\(escapedCity)&stateAbv=\(escapedState)&limit=10”)!
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithURL(url) { (items, response, error) -> Void in
if error != nil {
print(error)
}else {
if let items = items {
do {
let jsonResult = try NSJSONSerialization.JSONObjectWithData(items, options: NSJSONReadingOptions.MutableContainers) as! NSDictionary
if jsonResult.count > 0 {
if let datas = jsonResult["data"] as? NSArray{
for data in datas{
if let title = data["title"] as? String {
if let street = data["street"] as? String {
if let city = data["city"] as? String {
if let stateAbv = data["stateAbv"] as? String {
if let zip = data["zip"] as? String {
self.geoAddress("\(title)", street: "\(street)", city: "\(city)", state: "\(stateAbv)", zip: "\(zip)")
}
}
}
}
}
}
}
}
} catch{}
}
}
}
task.resume()
}
func geoAddress(title: String, street: String, city: String, state: String, zip: String){
let storeName = "\(title)"
let location = "\(street) \(city) \(state) \(zip)"
let geocoder = CLGeocoder();
geocoder.geocodeAddressString(location, completionHandler: {(placemarks: [CLPlacemark]?, error: NSError?) -> Void in
if (error != nil) {
print("Error \(error!)")
} else if let placemark = placemarks?[0] {
let coordinates:CLLocationCoordinate2D = placemark.location!.coordinate
let pointAnnotation:MKPointAnnotation = MKPointAnnotation()
pointAnnotation.coordinate = coordinates
pointAnnotation.title = storeName
pointAnnotation.subtitle = location
self.mapView.addAnnotation(pointAnnotation)
}
})
}
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标签： ios swift clgeocoder