iOS中的定位

地理編碼 與 反地理編碼:

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

@interface ViewController ()

//建立一個CLGeocoder
@property (nonatomic, strong) CLGeocoder *geocoder;

#pragma mark - 地理編碼
//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 - 反地理編碼
//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 -地理編碼
//地址 ---> 經緯度
- (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 = @"您輸入的位置存在錯誤";
        } 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  郵編
             ISOcountryCode  國家編碼
             country  國家
             */
            
            //顯示最前面的地標
            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 -反地理編碼

//經緯度 --> 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 = @"您輸入的經緯度存在錯誤";
        } 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庫定位：

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

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

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    if ([CLLocationManager locationServicesEnabled]) {
        //能夠定位並開始定位
        [self.manager startUpdatingLocation];
        
        //傳入一個區域
        //[self.manager startMonitoringForRegion:<#(nonnull CLRegion *)#>];
        
    }else{
        
        //提醒用戶打開定位開關
        //檢查網絡
   
    }
    
    //計算距離
    [self countDistance];
    
    
}

//定位的方法
-(CLLocationManager *)manager{
    
    if (manager == nil) {
        //建立用戶管理器，定位用戶的位置
        manager = [[CLLocationManager alloc]init];
        //判斷當前的版本
        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;
        
        //精確度
        manager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
 
    }
    
    return manager;
}


//計算距離的方法
-(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];
    
    //緯度  location.coordinate.latitude
    //經度  location.coordinate.longitude

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


//進入某個區域調用
- (void)locationManager:(CLLocationManager *)manager
         didEnterRegion:(CLRegion *)region{
    

    
    
}


//離開某個區域調用
- (void)locationManager:(CLLocationManager *)manager
          didExitRegion:(CLRegion *)region{
    
    
    
    
}

 

 

 

iOS地圖（MapKit）：

#import "ViewController.h"
//先引入庫
#import <MapKit/MapKit.h>
//注意引入代理
@interface ViewController ()<MKMapViewDelegate>
//新建一個CLLocationManager
@property (nonatomic,strong) CLLocationManager *manager;


@end

@implementation ViewController


/**
 *  !!!!!!!!!注意：要在 Info.plist 中添加 NSLocationWhenInUseUsageDescription ，並把 Boolean 改爲 YES
 */




- (void)viewDidLoad {
    [super viewDidLoad];

    //判斷當前版本（8.0之後使用地圖須要先定位）
    if ([[[UIDevice currentDevice] systemVersion] doubleValue] >= 8.0) {
        self.manager = [[CLLocationManager alloc]init];
        [self.manager requestWhenInUseAuthorization];
        [self.manager requestAlwaysAuthorization];
    }
    
    //初始化地圖
    MKMapView *mapView = [[MKMapView alloc]initWithFrame:self.view.bounds];
    
    //設置地圖的類型
    mapView.mapType = MKMapTypeStandard;
    
    //設置跟蹤模式
    mapView.userTrackingMode = MKUserTrackingModeFollow;
    
    //設置代理（監控地圖的相關行爲：好比顯示的區域發生了改變）
    mapView.delegate = self;
    
    [self.view addSubview:mapView];
    
    
}


/**
 *  更新到用戶的位置時就會調用（顯示的位置、顯示範圍改變）
 *  userLocation : 大頭針模型數據， 對大頭針位置的一個封裝（這裏的userLocation描述的是用來顯示用戶位置的藍色大頭針）
 */
-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
    
    //地圖上的大頭針上的簡介
    userLocation.title = @"哈哈哈哈哈哈";
    userLocation.subtitle = @"我是介紹";

}

/**
 *  地圖顯示的區域即將改變了就會調用
 */
-(void)mapView:(MKMapView *)mapView regionWillChangeAnimated:(BOOL)animated{
    
    NSLog(@"regionWillChangeAnimated");
    
}


/**
 *  地圖顯示的區域改變了就會調用（顯示的位置、顯示範圍改變）
 */
-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
    
    //中心點
    CLLocationCoordinate2D center = mapView.region.center;
    //跨度
    MKCoordinateSpan span = mapView.region.span;
    
    NSLog(@"中心點=(%f,%f), 區域跨度=(%f,%f)", center.longitude,center.latitude,span.longitudeDelta,span.latitudeDelta);
    
}