你能从一个地址在Mapview中创建一个注释吗？ [英] Can you create an annotation in Mapview from an address?

问题描述

我今天几次搜索了这个问题而没有运气。我想知道是否可以从地址而不是使用lat / Long方法在Mapview中创建注释。我目前的代码如下。

I have "googled" this question a few times today with no luck. I would like to know if it is possible to create an annotation in Mapview from an address rather than using the lat/Long method. My current code is below.

//1. Create a coordinate for use with the annotation
    CLLocationCoordinate2D Sharon;
    Sharon.latitude = 38.952223;
    Sharon.longitude = -77.193646;

    Annotation *myAnnotation = [Annotation alloc];
    myAnnotation.coordinate = Sharon;
    myAnnotation.title = @"Sharon Lodge #327";
    myAnnotation.subtitle = @"McLean, VA";

推荐答案

试试这样，

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];
                     }

             ];

用于注释标题和副标题，

for annotation title and subtitle,

CLPlacemark *topResult = [placemarks objectAtIndex:0];

// Create an MLPlacemark

MKPlacemark *placemark = [[MKPlacemark alloc] initWithPlacemark:topResult];

// Create an editable PointAnnotation, using placemark's coordinates, and set your own title/subtitle
MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
point.coordinate = placemark.coordinate;
point.title = @"Sample Location";
point.subtitle = @"Sample Subtitle";


// Set your region using placemark (not point)          
MKCoordinateRegion region = self.mapView.region;
region.center = placemark.region.center;
region.span.longitudeDelta /= 8.0;
region.span.latitudeDelta /= 8.0;

// Add point (not placemark) to the mapView                                              
[self.mapView setRegion:region animated:YES];
[self.mapView addAnnotation:point];

// Select the PointAnnotation programatically
[self.mapView selectAnnotation:point animated:NO];

这篇关于你能从一个地址在Mapview中创建一个注释吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！