iOS中的定位

地理编码 与 反地理编码:

#import "ViewController.h"
//先引入库
#import <CoreLocation/CoreLocation.h>

@interface ViewController ()

//建立一个CLGeocoder
@property (nonatomic, strong) CLGeocoder *geocoder;

#pragma mark - 地理编码
//在界面上建立控件
- (IBAction)geocode;
@property (weak, nonatomic) IBOutlet UITextField *addressField;
@property (weak, nonatomic) IBOutlet UILabel *longitudeLabel;
@property (weak, nonatomic) IBOutlet UILabel *latitudeLabel;
@property (weak, nonatomic) IBOutlet UILabel *detailAddressLabel;

#pragma mark - 反地理编码
//在界面上建立控件
- (IBAction)reverseGeocode;
@property (weak, nonatomic) IBOutlet UITextField *longtitudeField;
@property (weak, nonatomic) IBOutlet UITextField *latitudeField;
@property (weak, nonatomic) IBOutlet UILabel *reverseDetailAddressLabel;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
}

- (CLGeocoder *)geocoder
{
    if (_geocoder == nil) {
        _geocoder = [[CLGeocoder alloc] init];
    }
    return _geocoder;
}

#pragma mark -地理编码
//地址 ---> 经纬度
- (void)geocode
{
    NSString *address = self.addressField.text;
    if (self.addressField.text.length == 0) {
        
        return;
    }
    
    
    [self.geocoder geocodeAddressString:address completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        
        if (error || placemarks.count == 0) {
            self.addressField.text = @"您输入的位置存在错误";
        } else {
            for (CLPlacemark *placemark in placemarks) {
                NSLog(@"name=%@ locality=%@ country=%@ postalCode=%@", placemark.name, placemark.locality, placemark.country, placemark.postalCode);
            }
            
            /*
             thoroughfare 街道
             locality  城市
             subLocality  街道
             postalCode  邮编
             ISOcountryCode  国家编码
             country  国家
             */
            
            //显示最前面的地标
            CLPlacemark *placemark = [placemarks firstObject];
            self.longitudeLabel.text = [NSString stringWithFormat:@"%.2f",placemark.location.coordinate.longitude];
            self.latitudeLabel.text = [NSString stringWithFormat:@"%.2f",placemark.location.coordinate.latitude];
            self.detailAddressLabel.text = placemark.name;
        }
    }];
}

#pragma mark -反地理编码

//经纬度 --> 地名
- (void)reverseGeocode
{
    CLLocation *location = [[CLLocation alloc] initWithLatitude:[self.latitudeLabel.text doubleValue] longitude:[self.longitudeLabel.text doubleValue]];
    
    [self.geocoder reverseGeocodeLocation:location completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        
        if (error || placemarks.count == 0) {
            self.reverseDetailAddressLabel.text = @"您输入的经纬度存在错误";
        } else {
            
            for (CLPlacemark *placemark in placemarks) {
                NSLog(@"name=%@ locality=%@ country=%@ postalCode=%@", placemark.name, placemark.locality, placemark.country, placemark.postalCode);
            }
            
            CLPlacemark *placemark = [placemarks firstObject];
            self.reverseDetailAddressLabel.text =  placemark.name;
            self.longtitudeField.text = [NSString stringWithFormat:@"%.2f",placemark.location.coordinate.longitude];
            self.latitudeField.text = [NSString stringWithFormat:@"%.2f",placemark.location.coordinate.latitude];

        }
    }];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [self.view endEditing:YES];
}

 

 

OC库定位：

#import "ViewController.h"
//引入库
#import "CoreLocation/CoreLocation.h"

@interface ViewController ()<CLLocationManagerDelegate>{
    
    CLLocationManager *manager;
    
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    if ([CLLocationManager locationServicesEnabled]) {
        //能够定位并开始定位
        [self.manager startUpdatingLocation];
        
        //传入一个区域
        //[self.manager startMonitoringForRegion:<#(nonnull CLRegion *)#>];
        
    }else{
        
        //提醒用户打开定位开关
        //检查网络
   
    }
    
    //计算距离
    [self countDistance];
    
    
}

//定位的方法
-(CLLocationManager *)manager{
    
    if (manager == nil) {
        //建立用户管理器，定位用户的位置
        manager = [[CLLocationManager alloc]init];
        //判断当前的版本
        if ([[[UIDevice currentDevice] systemVersion]floatValue] >= 8.0) {
            [manager requestAlwaysAuthorization];
            [manager requestWhenInUseAuthorization];
        }
        
        manager.delegate = self;
        
        //每隔多少米定位一次
        manager.distanceFilter = kCLDistanceFilterNone;
        
        //精确度
        manager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
 
    }
    
    return manager;
}


//计算距离的方法
-(void)countDistance{
    
    CLLocation *lo1 = [[CLLocation alloc]initWithLatitude:41 longitude:115];
    CLLocation *lo2 = [[CLLocation alloc]initWithLatitude:41 longitude:116];
    
    CLLocationDistance distance = [lo1 distanceFromLocation:lo2];
    
    NSLog(@"%f", distance);
    
}

//定位本身的位置
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
    
    CLLocation *location = [locations lastObject];
    
    //纬度  location.coordinate.latitude
    //经度  location.coordinate.longitude

    NSLog(@"纬度%f------经度%f",location.coordinate.latitude,location.coordinate.longitude);
    
    
    //中止更新位置（很是耗电）
//    [manager stopUpdatingLocation];
 
}


//进入某个区域调用
- (void)locationManager:(CLLocationManager *)manager
         didEnterRegion:(CLRegion *)region{
    

    
    
}


//离开某个区域调用
- (void)locationManager:(CLLocationManager *)manager
          didExitRegion:(CLRegion *)region{
    
    
    
    
}

 

 

 

iOS地图（MapKit）：

#import "ViewController.h"
//先引入库
#import <MapKit/MapKit.h>
//注意引入代理
@interface ViewController ()<MKMapViewDelegate>
//新建一个CLLocationManager
@property (nonatomic,strong) CLLocationManager *manager;


@end

@implementation ViewController


/**
 *  !!!!!!!!!注意：要在 Info.plist 中添加 NSLocationWhenInUseUsageDescription ，并把 Boolean 改为 YES
 */




- (void)viewDidLoad {
    [super viewDidLoad];

    //判断当前版本（8.0之后使用地图须要先定位）
    if ([[[UIDevice currentDevice] systemVersion] doubleValue] >= 8.0) {
        self.manager = [[CLLocationManager alloc]init];
        [self.manager requestWhenInUseAuthorization];
        [self.manager requestAlwaysAuthorization];
    }
    
    //初始化地图
    MKMapView *mapView = [[MKMapView alloc]initWithFrame:self.view.bounds];
    
    //设置地图的类型
    mapView.mapType = MKMapTypeStandard;
    
    //设置跟踪模式
    mapView.userTrackingMode = MKUserTrackingModeFollow;
    
    //设置代理（监控地图的相关行为：好比显示的区域发生了改变）
    mapView.delegate = self;
    
    [self.view addSubview:mapView];
    
    
}


/**
 *  更新到用户的位置时就会调用（显示的位置、显示范围改变）
 *  userLocation : 大头针模型数据， 对大头针位置的一个封装（这里的userLocation描述的是用来显示用户位置的蓝色大头针）
 */
-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
    
    //地图上的大头针上的简介
    userLocation.title = @"哈哈哈哈哈哈";
    userLocation.subtitle = @"我是介绍";

}

/**
 *  地图显示的区域即将改变了就会调用
 */
-(void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated{
    
    NSLog(@"regionWillChangeAnimated");
    
}


/**
 *  地图显示的区域改变了就会调用（显示的位置、显示范围改变）
 */
-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
    
    //中心点
    CLLocationCoordinate2D center = mapView.region.center;
    //跨度
    MKCoordinateSpan span = mapView.region.span;
    
    NSLog(@"中心点=(%f,%f), 区域跨度=(%f,%f)", center.longitude,center.latitude,span.longitudeDelta,span.latitudeDelta);
    
}