地图定位CLLocation详解

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1.CLLocation主要有一下几个重要的属性

 /

     *  CLLocation 详解

     *  coordinate : 经纬度

     *  altitude : 海拔

     *  course : 航向

     *  speed ; 速度

     */

1.1 distanceFromLocation: 方法

/* * distanceFromLocation: * * Discussion: * Returns the lateral distance between two locations. */ - (CLLocationDistance)distanceFromLocation:(const CLLocation *)location __OSX_AVAILABLE_STARTING(__MAC_10_6,__IPHONE_3_2);

可以这样一小段代码计算

 CLLocation *l1 = [[CLLocation alloc] initWithLatitude:21.123 longitude:123.456]; CLLocation *l2 = [[CLLocation alloc] initWithLatitude:22.123 longitude:123.456]; CLLocationDistance distance = [l1 distanceFromLocation:l2]; NSLog(@"distance=%f", distance);

结果：

[3308:] distance=.

2.course :航向

/

     *  场景演示:打印当前用户的行走方向,偏离角度以及对应的行走距离,

        例如:”北偏东 30度 方向,移动了8米”

     */

<pre name="code" class="objc">#import "ViewController.h" #import <CoreLocation/CoreLocation.h> @interface ViewController ()<CLLocationManagerDelegate> { // 老位置 CLLocation *_oldL; } / 位置管理者 */ @property (nonatomic, strong) CLLocationManager *lM; @end @implementation ViewController #pragma mark - 懒加载 - (CLLocationManager *)lM { if (!_lM) { // 1. 创建位置管理者 _lM = [[CLLocationManager alloc] init]; // 1.1 代理, 通知, block _lM.delegate = self; // 每隔多米定位一次 // _lM.distanceFilter = 100; / kCLLocationAccuracyBestForNavigation // 最适合导航 kCLLocationAccuracyBest; // 最好的 kCLLocationAccuracyNearestTenMeters; // 10m kCLLocationAccuracyHundredMeters; // 100m kCLLocationAccuracyKilometer; // 1000m kCLLocationAccuracyThreeKilometers; // 3000m */ // 精确度越高, 越耗电, 定位时间越长 _lM.desiredAccuracy = kCLLocationAccuracyBest; / -------iOS8.0+定位适配-------- */ if([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) { // 前台定位授权(默认情况下,不可以在后台获取位置, 勾选后台模式 location update, 但是 会出现蓝条) [_lM requestWhenInUseAuthorization]; // 前后台定位授权(请求永久授权) // +authorizationStatus != kCLAuthorizationStatusNotDetermined // 这个方法不会有效 // 当前的授权状态为前台授权时,此方法也会有效 // [_lM requestAlwaysAuthorization]; } // 允许后台获取用户位置(iOS9.0) if([[UIDevice currentDevice].systemVersion floatValue] >= 9.0) { // 一定要勾选后台模式 location updates _lM.allowsBackgroundLocationUpdates = YES; } // if ([_lM respondsToSelector:@selector(requestAlwaysAuthorization)]) // { // [_lM requestAlwaysAuthorization]; // } } return _lM; } -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { [self.lM startUpdatingLocation]; // CLLocation *l1 = [[CLLocation alloc] initWithLatitude:21.123 longitude:123.456]; // CLLocation *l2 = [[CLLocation alloc] initWithLatitude:22.123 longitude:123.456]; // // CLLocationDistance distance = [l1 distanceFromLocation:l2]; // NSLog(@"distance=%f", distance); } #pragma mark - CLLocationManagerDelegate / * 更新到位置之后调用 * * @param manager 位置管理者 * @param locations 位置数组 * is kind of */ -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations { // NSLog(@"定位到了"); / * CLLocation 详解 * coordinate : 经纬度 * altitude : 海拔 * course : 航向 * speed ; 速度 */ CLLocation *location = [locations lastObject]; // NSLog(@"%@", location); / * 场景演示:打印当前用户的行走方向,偏离角度以及对应的行走距离, 例如:”北偏东 30度 方向,移动了8米” */ // 1. 获取方向偏向 NSString *angleStr = nil; switch ((int)location.course / 90) { case 0: angleStr = @"北偏东"; break; case 1: angleStr = @"东偏南"; break; case 2: angleStr = @"南偏西"; break; case 3: angleStr = @"西偏北"; break; default: angleStr = @"跑沟里去了!!"; break; } // 2. 偏向角度 NSInteger angle = 0; angle = (int)location.course % 90; // 代表正方向 if (angle == 0) { NSRange range = NSMakeRange(0, 1); angleStr = [NSString stringWithFormat:@"正%@", [angleStr substringWithRange:range]]; } // 3.移动多少米 double distance = 0; if(_oldL) { distance = [location distanceFromLocation:_oldL]; } _oldL = location; // 4. 拼串 打印 // 例如:”北偏东 30度 方向,移动了8米” NSString *noticeStr = [NSString stringWithFormat:@"%@%zd方向, 移动了%f米", angleStr, angle, distance]; NSLog(@"%@", noticeStr); } / * 授权状态发生改变时调用 * * @param manager 位置管理者 * @param status 状态 */ -(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status { switch (status) { // 用户还未决定 case kCLAuthorizationStatusNotDetermined: { NSLog(@"用户还未决定"); break; } // 问受限 case kCLAuthorizationStatusRestricted: { NSLog(@"访问受限"); break; } // 定位关闭时和对此APP授权为never时调用 case kCLAuthorizationStatusDenied: { // 定位是否可用（是否支持定位或者定位是否开启） if([CLLocationManager locationServicesEnabled]) { NSLog(@"定位开启，但被拒"); }else { NSLog(@"定位关闭，不可用"); } // NSLog(@"被拒"); break; } // 获取前后台定位授权 case kCLAuthorizationStatusAuthorizedAlways: // case kCLAuthorizationStatusAuthorized: // 失效，不建议使用 { NSLog(@"获取前后台定位授权"); break; } // 获得前台定位授权 case kCLAuthorizationStatusAuthorizedWhenInUse: { NSLog(@"获得前台定位授权"); break; } default: break; } } // 定位失败 -(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error { NSLog(@"定位失败"); } @end

3.指南针

3.1.磁北角度

4.区域监听

#import "ViewController.h" #import <CoreLocation/CoreLocation.h> @interface ViewController ()<CLLocationManagerDelegate> / 位置管理者 */ @property (nonatomic, strong) CLLocationManager *lM; @end @implementation ViewController - (CLLocationManager *)lM { if (!_lM) { _lM = [[CLLocationManager alloc] init]; _lM.delegate = self; //请求用户定位授权 if([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) { [_lM requestAlwaysAuthorization]; } } return _lM; } - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { // 区域监听 CLLocationCoordinate2D center = {21.13, 123.456}; CLCircularRegion *region = [[CLCircularRegion alloc] initWithCenter:center radius:1000 identifier:@"walden"]; // [self.lM startMonitoringForRegion:region]; // CLLocationCoordinate2D center2 = {21.13, 123.456}; // CLCircularRegion *region2 = [[CLCircularRegion alloc] initWithCenter:center2 radius:1000 identifier:@"walden"]; // // [self.lM startMonitoringForRegion:region2]; // 请求区域状态 [self.lM requestStateForRegion:region]; } #pragma mark - CLLocationManagerDelegate // 进入区域 -(void)locationManager:(CLLocationManager *)manager didEnterRegion:(CLRegion *)region { NSLog(@"进入区域--%@", region.identifier); } // 离开区域 -(void)locationManager:(CLLocationManager *)manager didExitRegion:(CLRegion *)region { NSLog(@"离开区域--%@", region.identifier); } -(void)locationManager:(CLLocationManager *)manager didDetermineState:(CLRegionState)state forRegion:(CLRegion *)region { NSLog(@"%zd", state); //这个state是个枚举值 / * CLRegionState * * Discussion: * Represents the current state of the device with reference to a region. * * typedef NS_ENUM(NSInteger, CLRegionState){ CLRegionStateUnknown, CLRegionStateInside, CLRegionStateOutside } NS_ENUM_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED __WATCHOS_PROHIBITED; */ } @end

5.地理编码与反地理编码

#import "ViewController.h" #import <CoreLocation/CoreLocation.h> @interface ViewController () @property (weak, nonatomic) IBOutlet UITextView *addressTV; @property (weak, nonatomic) IBOutlet UITextField *laTF; @property (weak, nonatomic) IBOutlet UITextField *longTF; / 地理编码 */ @property (nonatomic, strong) CLGeocoder *geoC; @end @implementation ViewController - (CLGeocoder *)geoC { if (!_geoC) { _geoC = [[CLGeocoder alloc] init]; } return _geoC; } - (IBAction)geoCoder { NSString *addr = self.addressTV.text; // if ([addr length] == 0) { // return; // } [self.geoC geocodeAddressString:@"重庆" completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) { / * CLPlacemark location : 位置对象 addressDictionary : 地址字典 name : 地址全称 */ if(error == nil) { NSLog(@"%@", placemarks); [placemarks enumerateObjectsUsingBlock:^(CLPlacemark * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { NSLog(@"%@", obj.name); self.addressTV.text = obj.name; self.laTF.text = @(obj.location.coordinate.latitude).stringValue; self.longTF.text = @(obj.location.coordinate.longitude).stringValue; }]; }else { NSLog(@"cuowu--%@", error.localizedDescription); } }]; } - (IBAction)reverseGeoCoder { double lati = [self.laTF.text doubleValue]; double longi = [self.longTF.text doubleValue]; // TODO: 容错 CLLocation *loc = [[CLLocation alloc] initWithLatitude:lati longitude:longi]; [self.geoC reverseGeocodeLocation:loc completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) { if(error == nil) { NSLog(@"%@", placemarks); [placemarks enumerateObjectsUsingBlock:^(CLPlacemark * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { NSLog(@"%@", obj.name); self.addressTV.text = obj.name; self.laTF.text = @(obj.location.coordinate.latitude).stringValue; self.longTF.text = @(obj.location.coordinate.longitude).stringValue; }]; }else { NSLog(@"cuowu"); } }]; } @end 

效果：

6. INTULocationManager框架的使用

#import "ViewController.h" #import "INTULocationManager.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { #warning 注意要在info.plist中配置请求用户隐私权限的key //精确度 超时 是否一直获取位置信息 // INTULocationManager *locMgr = [INTULocationManager sharedInstance]; // INTULocationRequestID requestID = [locMgr requestLocationWithDesiredAccuracy:INTULocationAccuracyCity // timeout:5.0 // delayUntilAuthorized:YES // block:^(CLLocation *currentLocation, INTULocationAccuracy achievedAccuracy, INTULocationStatus status) { // if (status == INTULocationStatusSuccess) { // NSLog(@"%@", currentLocation); // } // else // { // NSLog(@"cuowu--%zd", status); // } // }]; // INTULocationManager *locMgr = [INTULocationManager sharedInstance]; INTULocationRequestID requestID = [locMgr subscribeToLocationUpdatesWithBlock:^(CLLocation *currentLocation, INTULocationAccuracy achievedAccuracy, INTULocationStatus status) { if (status == INTULocationStatusSuccess) { NSLog(@"%@", currentLocation); } else { NSLog(@"cuowu--%zd", status); } }]; // Force the request to complete early, like a manual timeout (will execute the block) // [[INTULocationManager sharedInstance] forceCompleteLocationRequest:requestID]; // Cancel the request (won't execute the block) // [[INTULocationManager sharedInstance] cancelLocationRequest:requestID]; } @end