iOS 开发指南 第16章 定位服务与地图应用之使用苹果地图

- (void)viewDidLoad {
    [super viewDidLoad];
    设置样式，枚举类型MKMapType
    self.mapView.mapType = MKMapTypeStandard;
    // self.mapView.mapType = MKMapTypeSatellite;
    将当前视图控制器赋值给地图视图的delegate属性
    self.mapView.delegate = self;
}

- (void)mapViewDidFailLoadingMap:(MKMapView *)theMapView withError:(NSError *)error {

    NSLog(@"error : %@",[error description]);

}

触发添加动作
- (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：%lu",[placemarks count]);
        
        if ([placemarks count] > 0) {移除标注点
            [self.mapView removeAnnotations:self.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);
            [self.mapView setRegion:viewRegion animated:YES];

            自定义的实现了MKAnnotation协议的地图标注点类（气泡信息）
            MyAnnotation *annotation = [[MyAnnotation alloc] init];
            将编码好的位置信息放到地图标注点中
            annotation.streetAddress = placemark.thoroughfare;
            annotation.city = placemark.locality;
            annotation.state = placemark.administrativeArea;
            annotation.zip = placemark.postalCode;
            annotation.coordinate = placemark.location.coordinate;
            将标注点添加到地图视图上
            [self.mapView addAnnotation:annotation];
        }
        
        //关闭键盘
        [_txtQueryKey resignFirstResponder];
    }];
    
}

#pragma mark Map View Delegate Methods 实现协议

- (MKAnnotationView *) mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>) annotation 

    使用重用机制获取标注视图（annotation和annotationView的区别）

    MKPinAnnotationView *annotationView

    = (MKPinAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:@"PIN_ANNOTATION"];

    if(annotationView == nil) {

        annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation

                                                         reuseIdentifier:@"PIN_ANNOTATION"];

    }设置大头针标注图颜色

    annotationView.pinColor = MKPinAnnotationColorPurple;

    设置标注视图是否以动画效果的形式显示在地图上

    annotationView.animatesDrop = YES;

    设置附加信息气泡，气泡文字封装在MYAnnotation类中    

    annotationView.canShowCallout = YES;

    return annotationView;

}

- (NSString *)title {协议方法就是设置title和subtitle
    return @"您的位置!";
}
- (NSString *)subtitle {拼接字符串
    
    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;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    if ([CLLocationManager locationServicesEnabled])判断能否开启定位服务
    {
        self.mapView.mapType = MKMapTypeStandard;
        self.mapView.delegate = self;
        //self.mapView.showsUserLocation = YES;允许跟踪用户信息
        设置用户跟踪模式 枚举类型
        [self.mapView setUserTrackingMode:MKUserTrackingModeFollow animated:YES];
        //授权
        self.locationManager = [[CLLocationManager alloc] init];
        [self.locationManager requestWhenInUseAuthorization];
        [self.locationManager requestAlwaysAuthorization];
    }
}

- (IBAction)geocodeQuery:(id)sender {
    
    if (self.txtQueryKey.text == nil || [self.txtQueryKey.text length] == 0) {
        return;
    }
    
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder geocodeAddressString:self.txtQueryKey.text completionHandler:^(NSArray *placemarks, NSError *error) {
        NSLog(@"查询记录数：%lu",[placemarks count]);
        
        if ([placemarks count] > 0) {
            CLPlacemark* placemark = placemarks[0];
            获取地理坐标点
            CLLocationCoordinate2D coordinate = placemark.location.coordinate;
            获取该地理坐标点的信息
            NSDictionary* address = placemark.addressDictionary;
            定位地标点设置 
            MKPlacemark *place = [[MKPlacemark alloc]
                                  initWithCoordinate:coordinate addressDictionary:address];
            设置地图上点的信息
            MKMapItem *mapItem = [[MKMapItem alloc]initWithPlacemark:place];
            调用iOS自带的苹果地图应用 参数是字典类型可以控制显示地图的初始化信息
            [mapItem openInMapsWithLaunchOptions:nil];
如果有多个点需要标注：先遍历再使用＋（BOOL）openMapsWithItems:(NSArray *)mapItems launchOptions:(NSDictionary *)lunchOptions
            
            
//             //地图上设置行车路线 默认起点是当前位置，终点是查询的地点
//             NSDictionary* options =[[NSDictionary alloc]initWithObjectsAndKeys:
//             MKLaunchOptionsDirectionsModeDriving驾车路线,MKLaunchOptionsDirectionsModeKey设定路线模式, nil];
//             
//             MKMapItem *mapItem = [[MKMapItem alloc]initWithPlacemark:place];
//             [mapItem openInMapsWithLaunchOptions:options];
            
            
            //关闭键盘
            [_txtQueryKey resignFirstResponder];
        }
    }];
    
}