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：

[objc] view plain copy

#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：

[objc] view plain copy

#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