iOS - MKMapView使用地址而不是lat/long来放置注释

Question

我可以MKMapView通过使用纬度和经度对我进行注释,但是,我需要使用位置的源是使用街道地址而不是Lat和Long.例如1234 West 1234 east,San Francisco,CA ...

这有什么关系CLLocationManager吗？

有没有人尝过这个？

Answer 1

基于psoft的优秀信息,我能够通过此代码实现我想要的.

NSString *location = @"some address, state, and zip";
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
            [geocoder geocodeAddressString:location 
                 completionHandler:^(NSArray* placemarks, NSError* error){
                     if (placemarks && placemarks.count > 0) {
                         CLPlacemark *topResult = [placemarks objectAtIndex:0];
                         MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];

                         MKCoordinateRegion region = self.mapView.region;
                         region.center = placemark.region.center;
                         region.span.longitudeDelta /= 8.0;
                         region.span.latitudeDelta /= 8.0;

                         [self.mapView setRegion:region animated:YES];
                         [self.mapView addAnnotation:placemark];
                     }
                 }
             ];

Answer 2

重构的Swift版本:

let location = "some address, state, and zip"
let geocoder = CLGeocoder()
geocoder.geocodeAddressString(location) { [weak self] placemarks, error in
    if let placemark = placemarks?.first, let location = placemark.location {
        let mark = MKPlacemark(placemark: placemark)

        if var region = self?.mapView.region {
            region.center = location.coordinate
            region.span.longitudeDelta /= 8.0
            region.span.latitudeDelta /= 8.0
            self?.mapView.setRegion(region, animated: true)
            self?.mapView.addAnnotation(mark)
        }
    }
}

Answer 3

你所追求的是地理编码或前向地理编码.反向地理编码是将纬度/经度对转换为街道地址的过程.

iOS5提供了用于地理编码的CLGeocoder类.MKPlacemark支持iOS> = 3.0中的反向编码.当然涉及的数据非常大,因此您的应用通常需要网络访问功能.

一个好的起点是Apple的位置感知编程指南.此外,SO上有很多关于这方面的问题.https://stackoverflow.com/search?q=geocoding

祝好运!

Answer 4

Swift版本

        let location = self.txtLocation.text;
        let geocoder:CLGeocoder = CLGeocoder();
        geocoder.geocodeAddressString(location!) { (placemarks: [CLPlacemark]?, error: NSError?) -> Void in
            if placemarks?.count > 0 {
                let topResult:CLPlacemark = placemarks![0];
                let placemark: MKPlacemark = MKPlacemark(placemark: topResult);

                var region: MKCoordinateRegion = self.mkMapView.region;
                region.center = (placemark.location?.coordinate)!;
                region.span.longitudeDelta /= 8.0;
                region.span.latitudeDelta /= 8.0;
                self.mkMapView.setRegion(region, animated: true);
                self.mkMapView.addAnnotation(placemark);

            }
        }

Answer 5

自的iOS 7,placemark.region.center已弃用.现在需要使用:

region.center = [(CLCircularRegion *)placemark.region center];

您还可以阅读苹果文档关于这个和这里了.

Answer 6

这是另一个版本...

-Swift 2017语法

-在底部下方显示该地点的地名

-选择任何大小，例如5公里，如图所示

func map() {
    let 5km:CLLocationDistance = 5000

    let a= "100 smith avenue some town 90210 SD"
    let g = CLGeocoder()

    g.geocodeAddressString(a) { [weak self] placemarks, error in
        if let p = placemarks?.first, let l = placemark.location {

            let p = MKPlacemark(coordinate: l.coordinate, addressDictionary: nil)

            let cr = MKCoordinateRegionMakeWithDistance(l.coordinate, 5km, 5km)
            let options = [
                MKLaunchOptionsMapCenterKey: NSValue(mkCoordinate: cr.center),
                MKLaunchOptionsMapSpanKey: NSValue(mkCoordinateSpan: cr.span)
            ]

            let m = MKMapItem(placemark: p)
            m.name = "Your House"
            m.openInMaps(launchOptions: options)
        }
    }


}