iOS系统定位那些事

 今天来说下iOS定位中的那些事,咱们闲话少叙,直奔主题。

 最近在做和定位有关的业务,索性就又研究了一下iOS 10系统级的定位功能(之前也做过和定位相关的app),从iOS 8以后,我们引用系统级的功能都要去在info.plsit中去设置访问权限,定位的权限:
 权限一:

NSLocationAlwaysUsageDescription
应用需要访问定位(始终)

 权限二:

NSLocationWhenInUseUsageDescription
应用需要访问定位(在使用期间)

当然我们把这两个权限全部添加进去也是可以的,我们值需要在初始化定位的时候告诉定位管理器,是按那种权限访问的就ok,比如:

//使用应用程序期间允许访问位置数据
[self.locationManagerrequestWhenInUseAuthorization];

这样就是在打开应用期间访问定位。

首先,我们先来创建一个定位管理器LocationManager,在LocationManager.h文件里面声明一些方法和变量,如下:

#import"LocationModel.h"

@interfaceLocationManager :NSObject

@property(nonatomic,strong)LocationModel*location;

//开始定位
- (void)beginUpdatingLocation;

//结束定位
- (void)stopLocationService;

//设置定位精度(这个属性依使用情况而定,如果要求不是很高的,只是用定位就不要设置高经度,设置的经度越高,系统越耗电)
-(double)setDesiredAccuracy:(CLLocationAccuracy)desiredAccuracy;

//设置每隔多少米定位一次
- (double) setDistanceFilter :(CLLocationDistance)distanceFilter;

+ (LocationManager*)shareLocation;

@end

现在可以在LocationManager.m文件去实现:


#import "LocationManager.h"

@interface LocationManager()


@property (nonatomic, strong) CLLocationManager * locationManager;

@end

@implementation LocationManager


+ (LocationManager *)shareLocation
{
    static LocationManager *location = nil;
    static dispatch_once_t once;
    dispatch_once(&once, ^{
        location = [[LocationManager alloc] init];
    });
    
    return location;
}


/******************************************************************************
 **** beginUpdatIngLocation Method                                         ****
******************************************************************************/
#pragma mark -
#pragma mark beginUpdatIngLocation Method

//开始定位
- (void)beginUpdatingLocation
{
    //判断定位操作是否被允许
    if([CLLocationManager locationServicesEnabled] == YES)
    {
        self.locationManager = [[CLLocationManager alloc] init] ;
        self.locationManager.delegate = self;
        //使用应用程序期间允许访问位置数据
        [self.locationManager requestWhenInUseAuthorization];
        // 开始定位
        [self.locationManager startUpdatingLocation];
    }
}
//typedef NS_ENUM(int, CLAuthorizationStatus) {
//    kCLAuthorizationStatusNotDetermined = 0,//用户还没有做选择
//    kCLAuthorizationStatusRestricted,//应用拒接使用定位服务
//    kCLAuthorizationStatusDenied,//用户拒绝授权
//    kCLAuthorizationStatusAuthorizedAlways,//8.0后可用,始终授权位置服务
//    kCLAuthorizationStatusAuthorizedWhenInUse,//8.0后可用,只在前台授权位置服务
//};

//停止定位
- (void)stopLocationService
{
    [self.locationManager stopUpdatingLocation];
    [self.locationManager setDelegate: nil];
}
//定位失败展现提示框
- (void)showAlertView
{
    UIAlertView *alertV = [[UIAlertView alloc]initWithTitle:@"提示"
                                                    message:@"定位服务当前可能尚未打开,请在设置中打开定位!"
                                                   delegate:self
                                          cancelButtonTitle:@"取消"
                                          otherButtonTitles:@"设置", nil];
    alertV.tag = 1000;
    [alertV show];
}

-    (void)alertView:(UIAlertView *)alertView
clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView.tag == 1000)
    {
        if (buttonIndex == 0)
        {
            return;
        }
        else if (buttonIndex == 1)
        {
            //定位服务设置界面
            NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
            if ([[UIApplication sharedApplication] canOpenURL:url])
            {
                [[UIApplication sharedApplication] openURL:url];
            }
        }
    }
}

/******************************************************************************
 **** location Delegate Method                                             ****
******************************************************************************/
#pragma mark -
#pragma mark location Delegate Method
//定位成功,获取地理位置
- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations
{
     //系统会一直更新数据,直到选择停止更新,因为我们只需要获得一次经纬度即可,所以获取之后就停止更新
    [self stopLocationService];
    //获取新的位置
    CLLocation * newLocation = [locations lastObject];
    
    //创建自定制位置对象
    LocationModel *oneLocation = [[LocationModel alloc] init];
    
    //存储经度
    oneLocation.longitude = newLocation.coordinate.longitude;
    
    //存储纬度
    oneLocation.latitude = newLocation.coordinate.latitude;
    
    //获取当前所在的城市名
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    
    //根据经纬度反向地理编译出地址信息
    [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray * _Nullable placemarks, NSError * _Nullable error)
    {
         if (placemarks.count >0 && error == nil)
         {
             CLPlacemark *placemark = [placemarks objectAtIndex:0];
            //获取城市
             //存储位置信息
             oneLocation.country = String(placemark.country);
             oneLocation.administrativeArea = String(placemark.administrativeArea);
             oneLocation.subLocality = String(placemark.subLocality);
             oneLocation.thoroughfare = String(placemark.thoroughfare);
             oneLocation.subThoroughfare = String(placemark.subThoroughfare);
             oneLocation.locality = String(placemark.locality);
             oneLocation.concreteAdd = String(placemark.name);
             if (!oneLocation.locality)
             {
                 //四大直辖市的城市信息无法通过locality获得,只能通过获取省份的方法来获得(如果city为空,则可知为直辖市)
                 oneLocation.locality = String(placemark.administrativeArea);
             }
             self.location = oneLocation;
          }
        if (error != nil || placemarks.count == 0)
        {
            NSLog(@"No results were returned or An error occurred = %@", error);
            return ;
        }
     }];
}

// 代理方法中监听授权的改变,被拒绝有两种情况,一是真正被拒绝,二是服务关闭了
//-      (void)locationManager:(CLLocationManager *)manager
//didChangeAuthorizationStatus:(CLAuthorizationStatus)status
//{
//    switch (status)
//    {
//        case kCLAuthorizationStatusNotDetermined:
//        {
//            NSLog(@"用户未决定");
//            break;
//        }
//            // 系统预留字段,暂时还没用到
//        case kCLAuthorizationStatusRestricted:
//        {
//            NSLog(@"受限制");
//            break;
//        }
//        case kCLAuthorizationStatusDenied:
//        {
//            // 被拒绝有两种情况 1.设备不支持定位服务 2.定位服务被关闭
//            if ([CLLocationManager locationServicesEnabled]) {
//                NSLog(@"真正被拒绝");
//                // 跳转到设置界面
////                [self showAlertView];
//            }
//            else {
//                NSLog(@"没有开启此功能");
//            }
//            break;
//        }
//        case kCLAuthorizationStatusAuthorizedAlways:
//        {
//            NSLog(@"前后台定位授权");
//            break;
//        }
//        case kCLAuthorizationStatusAuthorizedWhenInUse:
//        {
//            NSLog(@"前台定位授权");
//            break;
//        }
//            
//        default:
//            break;
//    }
//}
//定位失败
-(void)locationManager:(CLLocationManager *)manager
      didFailWithError:(NSError *)error
{    
    self.location = nil;
    //[self showAlertView];
}
//设置过滤器
- (double)setDistanceFilter:(CLLocationDistance)distanceFilter
{
    NSLog(@"过滤器:%lf",distanceFilter);
    return _locationManager.distanceFilter = distanceFilter;
}
//设置定位精度
- (double)setDesiredAccuracy:(CLLocationAccuracy)desiredAccuracy
{
    NSLog(@"定位精度:%lf",desiredAccuracy);
    return _locationManager.desiredAccuracy = desiredAccuracy;
}

@end

数据的model:

#import 
#import 

@interface LocationModel : NSObject

//国家
@property (nonatomic, copy) NSString * country;

//省 直辖市
@property (nonatomic, copy) NSString * administrativeArea;

//地级市 直辖市区
@property (nonatomic, copy) NSString * locality;

//县 区
@property (nonatomic, copy) NSString * subLocality;

//街道
@property (nonatomic, copy) NSString * thoroughfare;

//子街道
@property (nonatomic, copy) NSString * subThoroughfare;

//具体地址:  xx市xx区xx街道
@property (nonatomic, copy) NSString *concreteAdd;

//经度
@property (nonatomic, assign) CLLocationDegrees longitude;

//纬度
@property (nonatomic, assign) CLLocationDegrees latitude;

//海拔
@property (nonatomic,assign) CLLocationDistance  altitude;

//航向
@property (nonatomic,assign) CLLocationDirection  course;

//行走速度
@property (nonatomic,assign) CLLocationDegrees  speed;


@end

以上,就是今天给大家分享的关于ios定位的那些事,希望可以帮助到大家,谢谢!

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