iOS 后台持续定位详解(支持ISO9.0以上)

iOS 后台持续定位详解(支持ISO9.0以上)

#import <CoreLocation/CoreLocation.h>并实现CLLocationManagerDelegate 代理，.h文件完整代码如下：

 

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>

@interface ViewController : UIViewController<CLLocationManagerDelegate>

@end

 

 

2.info.list文件:

右键，Add Row,添加的Key为NSLocationAlwaysUsageDescription，其它值默认，示例如下：

 

3.添加后台定位权限

4.ViewController.m 文件：

(1)定义一个私有CLLocationManager对象

 

(2)初始化并设置参数（initLocation方法），其中

locationManager.desiredAccuracy设置定位精度，有六个值可选，精度依次递减

 

kCLLocationAccuracyBestForNavigation 

kCLLocationAccuracyBest

kCLLocationAccuracyNearestTenMeters

kCLLocationAccuracyHundredMeters

kCLLocationAccuracyKilometer

kCLLocationAccuracyThreeKilometers

 

 

locationManager.pausesLocationUpdatesAutomatically 设置是否允许系统自动暂停定位，这里要设置为NO，刚开始我没有设置，后台定位持续20分钟左右就停止了！

 

(3)实现CLLocationManagerDelegate的代理方法，此方法在每次定位成功后调用：

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray*)locations;

*也可以通过实现以下方法：

- (void)locationManager:(CLLocationManager *)manager

didUpdateToLocation:(CLLocation *)newLocation

  fromLocation:(CLLocation *)oldLocation

 

 

(4)实现CLLocationManagerDelegate的代理方法，此方法在定位出错后调用：

 

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

 

.m文件完整代码如下：

#import "ViewController.h"

@interface ViewController (){
    CLLocationManager *locationManager;
    CLLocation *newLocation;
    CLLocationCoordinate2D coordinate;
}

@end

@implementation ViewController

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

#pragma mark 初始化定位
-(void)initLocation {
    locationManager=[[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;//设置定位精度
    if([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0){
        [locationManager requestAlwaysAuthorization];
    }
    // 9.0以后这个必须要加不加是不能实现后台持续定位的的
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 9.0) {
        locationManager.allowsBackgroundLocationUpdates = YES;
    }
    if(![CLLocationManager locationServicesEnabled]){
        NSLog(@"请开启定位:设置 > 隐私 > 位置 > 定位服务");
    }
    locationManager.pausesLocationUpdatesAutomatically = NO;
    [locationManager startUpdatingLocation];
    //[locationManager startMonitoringSignificantLocationChanges];
}

#pragma mark 定位成功
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{
    newLocation = [locations lastObject];
    double lat = newLocation.coordinate.latitude;
    double lon = newLocation.coordinate.longitude;
    NSLog(@"lat:%f,lon:%f",lat,lon);
}

#pragma mark 定位失败
-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    NSLog(@"error:%@",error);
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end