iOS.定位服务与地图应用.04.使用iOS苹果地图

#import <MapKit/MapKit.h>

@interface MapLocation : NSObject<MKAnnotation>

//街道信息属性
@property (nonatomic, copy) NSString *streetAddress;
//城市信息属性
@property (nonatomic, copy) NSString *city;
//州、省、市信息
@property (nonatomic, copy) NSString *state;
//邮编
@property (nonatomic, copy) NSString *zip;
//地理坐标
@property (nonatomic, readwrite) CLLocationCoordinate2D coordinate;

@end

#import "MapLocation.h"

@implementation MapLocation

- (NSString *)title {
return @"您的位置!";
}
- (NSString *)subtitle {

NSMutableString *ret = [NSMutableString new];
if (_state)
[ret appendString:_state];
if (_city)
[ret appendString:_city];
if (_city && _state)
[ret appendString:@", "];
if (_streetAddress && (_city || _state || _zip))
[ret appendString:@" • "];
if (_streetAddress)
[ret appendString:_streetAddress];
if (_zip)
[ret appendFormat:@", %@", _zip];

return ret;
}

@end

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
#import "MapLocation.h"

@interface T20140621234700ViewController : UIViewController

@property (weak, nonatomic) IBOutlet UITextField *txtQueryKey;

@property (weak, nonatomic) IBOutlet MKMapView *mapView;

- (IBAction)geocodeQuery:(id)sender;

@end

#import "T20140621234700ViewController.h"

@interface T20140621234700ViewController ()

@end

@implementation T20140621234700ViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

_mapView.mapType = MKMapTypeStandard;
//    _mapView.mapType = MKMapTypeSatellite;
_mapView.delegate = self;
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (IBAction)geocodeQuery:(id)sender {

if (_txtQueryKey.text == nil || [_txtQueryKey.text length] == 0) {
return;
}

CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder geocodeAddressString:_txtQueryKey.text completionHandler:^(NSArray *placemarks, NSError *error) {

NSLog(@"查询记录数：%i",[placemarks count]);

if ([placemarks count] > 0) {
[_mapView removeAnnotations:_mapView.annotations];
}

for (int i = 0; i < [placemarks count]; i++) {

CLPlacemark* placemark = placemarks[i];

//关闭键盘
[_txtQueryKey resignFirstResponder];

//调整地图位置和缩放比例
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(placemark.location.coordinate, 10000, 10000);
[_mapView setRegion:viewRegion animated:YES];

MapLocation *annotation = [[MapLocation alloc] init];
annotation.streetAddress = placemark.thoroughfare;
annotation.city = placemark.locality;
annotation.state = placemark.administrativeArea;
annotation.zip = placemark.postalCode;
annotation.coordinate = placemark.location.coordinate;

[_mapView addAnnotation:annotation];
}
}];

}

#pragma mark -
#pragma mark Map View Delegate Methods
- (MKAnnotationView *) mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>) annotation {

MKPinAnnotationView *annotationView
= (MKPinAnnotationView *)[_mapView dequeueReusableAnnotationViewWithIdentifier:@"PIN_ANNOTATION"];
if(annotationView == nil) {
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:@"PIN_ANNOTATION"];
}

annotationView.pinColor = MKPinAnnotationColorPurple;
annotationView.animatesDrop = YES;
annotationView.canShowCallout = YES;

return annotationView;
}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
_mapView.centerCoordinate = userLocation.location.coordinate;
}

- (void)mapViewDidFailLoadingMap:(MKMapView *)theMapView withError:(NSError *)error {
NSLog(@"error : %@",[error description]);
}

@end