iOS - MKMapView 通过使用地址而不是经纬度来放置注释
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/9606031/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
iOS - MKMapView place annotation by using address instead of lat / long
提问by Romes
I am able to place annotations on my MKMapViewby using latitude and longitude, however, my feed coming in that I need to use location for is using street addresses instead of Lat and Long. e.g 1234 west 1234 east, San Francisco, CA ...
我可以MKMapView通过使用纬度和经度在我的上放置注释，但是，我需要使用位置的提要使用街道地址而不是纬度和经度。例如 1234 西 1234 东，加利福尼亚州旧金山...
Would this have something to do with the CLLocationManager?
这会与CLLocationManager?
Has anyone attempted this before?
以前有人尝试过吗？
回答by Romes
Based on psoft's excellent information, I was able to achieve what I was looking for with this code.
基于psoft的出色信息，我能够使用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];
}
}
];
回答by NatashaTheRobot
Refactored Swift version:
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)
}
}
}
回答by QED
What you're after is called geocodingor forward-geocoding. Reverse-geocodingis the process of converting a lat/long pair to street address.
您所追求的称为geocoding或forward-geocoding。反向地理编码是将纬度/经度对转换为街道地址的过程。
iOS5 provides the CLGeocoderclass for geocoding. MKPlacemark supports reverse-goecoding in iOS >= 3.0. The data involved of course is very large, so your app will generally need network access to the functionality.
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。所涉及的数据当然非常大，因此您的应用程序通常需要网络访问功能。
A good place to start is Apple's Location Awareness Programming Guide. Also, there are LOTS of questions about this here on SO. https://stackoverflow.com/search?q=geocoding
一个很好的起点是 Apple 的位置感知编程指南。此外，SO 上有很多关于此的问题。https://stackoverflow.com/search?q=geocoding
Good luck!
祝你好运！
回答by Deepak Thakur
Swift version
迅捷版
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);
}
}
回答by EEduard
Since iOS 7, placemark.region.centeris deprecated. Now needs to use:
从 iOS 7 开始，placemark.region.center已被弃用。现在需要使用：
region.center = [(CLCircularRegion *)placemark.region center];
You can also read Apple Documentation about thisand heretoo.
回答by Fattie
Here's another version ...
这是另一个版本...
- Swift 2017 syntax
- Swift 2017 语法
- Shows a placename for the point, down the bottom
- 在底部显示该点的地名
- Choose any size, say 5 km, as the area shown
- 选择任意大小，比如 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)
}
}
}
回答by yinkou
That is not possible. But you can obtain the long/lat from an Address by using the CLGeocoderclass.
这是不可能的。但是您可以使用CLGeocoder该类从 Address 获取 long/lat 。
