IOS 之 Core Loaction 定位服务与地图

冷不防 2022-09-18 01:58 195阅读 0赞

使用CLLoactionManager类之前得加入 CoreLocation框架

然后加入头文件

\#import<CoreLocation/CoreLocation.h>

\#import<CoreLocation/CLLocationManagerDelegate>

接着定义变量

CLLocationManager\* location;

\_location = \[\[CLLocationManageralloc\]init\];

\_location.delegate =self;

\_location.desiredAccuracy =kCLLocationAccuracyBest; //设置精确度到M  精确越大越耗电

\_location.distanceFilter = 1000.0f; //多少距离侦测一次

\[\_locationstartUpdatingLocation\]; //开始侦测

\[\_location stopUpdatingLocation\]; //停止侦测

//委托方法

//更新方法
    -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
    {
        CLLocation* lo = [locations lastObject];
        _pointX.text = [NSString stringWithFormat:@"%g", lo.coordinate.longitude];
        _pointY.text = [NSString stringWithFormat:@"%g", lo.coordinate.latitude];
        
        CLGeocoder *geocoder = [CLGeocoder new];
        [geocoder reverseGeocodeLocation:lo completionHandler:^(NSArray *placemarks, NSError *error) {
            if ( [placemarks count] > 0 ) {
                CLPlacemark* placemark = placemarks[0];
                NSDictionary *dictAddress = placemark.addressDictionary;
                NSString *strAddress = [dictAddress objectForKey:(NSString*)kABPersonAddressStateKey];
                self.address.text = strAddress;
                NSLog(@"地址: %@", strAddress);
            }
        }];
    }

//失败时调用的方法

\-(void)locationManager:(CLLocationManager \*)manager didFailWithError:(NSError \*)error

CLLocation\* lo; 属性

lo.coordinate.longitude  //精度

lo.coordinate.latitude  //纬度

lo.horizontalAccuracy  //中心圆半径.相当于地图上你看到的自己所在的一个圆圈  值越大位置越不确定 为负时就不能依赖坐标值了.

lo.altitude  //海平面上下多少米

lo.verticalAccuracy  //海拨, 为负不确定海拨

ClLocationDistance distance = \[lo distanceFromLocation: CLLocation\* lo\]; //计算两个之间的距离

//地理信息反编码,就是把看不懂的坐标数字转换为地点的相关描述,包括国家,市,街道,很准确

//使用这个类取地址信息的时候还需要引入

\#import <AddressBook/AddressBook.h>

CLGeocoder \*geocoder = \[CLGeocodernew\]; //反编码类

CLPlacemark\* placemark = placemarks\[0\]; //封装着地点相关信息

placemark.addressDictionary //地址信息的字典,包含一些键值对,在地址簿框架中

placemark.ISOcountryCode    //ISO国家代号

placemark.postalCode        //邮政编码

placemark.administrativeArea  //行政区域信息

placemark.subAdministrativeArea  //行政区域附加信息

placemark.locality               //指定城市信息

placemark.subLocality            //指定城市信息附加信息

placemark.thoroughfare           //指定街道级别信息

placemark.subThoroughfare        //指定街道级别的附加信息

//通过地址信息查询

geocodeAddressString:completionHandler:

//这个网址可以是地图上的一些资料也可以生成GPX文件

http://mygeoposition.com

//关于地图相关的IOS6自带的地图

核心视图类是MKMapView,委托协议是MKMapViewDelegate 使用时需要导入MapKit框架.

\#import <MapKit/MapKit.h>

MKMapView \*mapView;

mapView.mapType

有以下几个类型

MKMapTypeStandard 标准地图

MKMapTypeStatellite 卫星地图

MKMapTypeHybrid  混合地图

mapView.showUserLocation 允许跟踪显示用户位置信息

setUserTrackingMode:MKUserTrackingModeFloow:animated: 设置跟踪模式 还得实现委托方法

MKUserTrackingModeNone 没有用户跟踪模式

MKUserTrackingModeFollow 可以跟踪用户的位置变化

MKUserTrackingModeFollowWithHeading 可以跟踪用户的位置和方向变化

//设置跟踪用户
    -(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
    {
        _mapView.centerCoordinate = userLocation.location.coordinate;
    }

//添加地图标注

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
    {
        CLLocation* lo = [locations lastObject];
        _pointX.text = [NSString stringWithFormat:@"%g", lo.coordinate.longitude];
        _pointY.text = [NSString stringWithFormat:@"%g", lo.coordinate.latitude];
        
        CLGeocoder *geocoder = [CLGeocoder new];
        [geocoder reverseGeocodeLocation:lo completionHandler:^(NSArray *placemarks, NSError *error) {
            if ( [placemarks count] > 0 ) {
                [_mapView removeAnnotations:_mapView.annotations];
                CLPlacemark* placemark = placemarks[0];
                //调整地图位置和缩放比例
                MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(placemark.location.coordinate, 10000, 10000);
                [_mapView setRegion:viewRegion animated:YES];
                LocationInfo *locationInfo = [LocationInfo new];
                locationInfo.stree = placemark.thoroughfare;
                locationInfo.coordinate = placemark.location.coordinate;
                //这个动作会触发下边委托方法
                [_mapView addAnnotation:locationInfo];
            }
        }];
    }

//被上边的add动作调用最后一个参数就是上边的locationInfo,这个必须自己定义而且还得实现MKAnnotation协议

//地图类的委托方法.  用于显示地图上的标注
    -(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; //大头针的颜色
        annotationView.animatesDrop = YES;   //设置标注视图时是否以动画效果
        annotationView.canShowCallout = YES;   //显示气泡提示信息
        
        return annotationView;
    }

//使用程序外的苹果地图

需要使用MKPlacemark和MKMapItem这两个类

- (IBAction)query:(id)sender {
        CLLocationCoordinate2D ll2d = _sPoint.coordinate; //_sPoint是CLLoation类
        NSDictionary *address = _place.addressDictionary; //_place是 CLPlaceMark类
        MKPlacemark *place1 = [[MKPlacemark alloc] initWithCoordinate:ll2d addressDictionary:address];
        MKMapItem *mapItem = [[MKMapItem alloc] initWithPlacemark:place1];
        [mapItem openInMapsWithLaunchOptions:nil];
    }

//调用谷歌WEB地图

- (IBAction)query:(id)sender {
        NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%f,%f", _sPoint.coordinate.latitude, _sPoint.coordinate.longitude];
        NSURL *url = [NSURL URLWithString:urlString];
        [[UIApplication sharedApplication] openURL:url];
    }

越学越深.努力吧