【代码笔记】iOS-离线地图

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一，效果图。

二，工程图。

三，代码。

ViewController.h

#import <UIKit/UIKit.h>#import <CoreLocation/CoreLocation.h>#import "MapLocation.h"@interface ViewController : UIViewController<MKMapViewDelegate>{    MKMapView *_mapView;    NSString *addressString;}@end

ViewController.m

#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.        //调用系统自带的高德地图        //显示当前某地的离线地图    _mapView = [[MKMapView alloc] init];    _mapView.frame = CGRectMake(0, 40, 320,400);    _mapView.delegate = self;    _mapView.mapType = MKMapTypeStandard;    [self.view addSubview:_mapView];            addressString=@"光启城";    NSLog(@"---addressString---%@",addressString);        [self geocodeQuery];    }- (void)geocodeQuery{        if (addressString == nil || [addressString length] == 0) {        return;    }        CLGeocoder *geocoder = [[CLGeocoder alloc] init];    [geocoder geocodeAddressString:addressString completionHandler:^(NSArray *placemarks, NSError *error) {                NSLog(@"查询记录数：%ld",[placemarks count]);                if ([placemarks count] > 0) {            [_mapView removeAnnotations:_mapView.annotations];        }                for (int i = 0; i < [placemarks count]; i++) {                        CLPlacemark* placemark = placemarks[i];                                                //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 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

MapLocation.h

#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

MapLocation.m

//地图调用函数#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

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