开启后台服务，如下图

在info.list文件里面需要开启持续定位服务

在AppDelegate里面添加如下代码

1. 创建CLLocationManager对象，并且设置CLLocationManagerDelegate的代理
2. 在didFinishLaunchingWithOptions方法里面调用rjxContinuedLocationManager这个方法

#import "AppDelegate.h"#import @interface AppDelegate()@property (nonatomic, strong) CLLocationManager *manager;@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {            //设置后台模式和锁屏模式下依然能够播放       [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionMixWithOthers error:nil];       [[AVAudioSession sharedInstance] setActive: YES error: nil];         [self rjxContinuedLocationManager];      [GeneratedPluginRegistrant registerWithRegistry:self];  // Override point for customization after application launch.  return [super application:application didFinishLaunchingWithOptions:launchOptions];}     // ios 8.x or older-(BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url{    return [FlutterAlipayPlugin handleOpenURL:url];}// ios 9.0+-(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary *)options{     return [FlutterAlipayPlugin handleOpenURL:url];}/** 应用进入后台执行定位 保证进程不被系统kill */-(void)rjxContinuedLocationManager{    //1.创建定位管理对象    _manager = [[CLLocationManager alloc]init];        //2.设置属性 distanceFilter、desiredAccuracy    [_manager setDistanceFilter:kCLDistanceFilterNone];//实时更新定位位置    [_manager setDesiredAccuracy:kCLLocationAccuracyBest];//定位精确度    if([_manager respondsToSelector:@selector(requestAlwaysAuthorization)]){        [_manager requestAlwaysAuthorization];    }    //该模式是抵抗程序在后台被杀，申明不能够被暂停    _manager.pausesLocationUpdatesAutomatically = NO;        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8) {        //在后台也可定位        [_manager requestAlwaysAuthorization];    }    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 9) {        _manager.allowsBackgroundLocationUpdates = YES;    }    //3.设置代理    _manager.delegate = self;    //4.开始定位    [_manager startUpdatingLocation];    //5.获取朝向    [_manager startUpdatingHeading];}// 当你的程序将要被挂起，会调用改方法- (void)applicationWillResignActive:(UIApplication *)application {    /** 应用进入后台执行定位 保证进程不被系统kill */    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];    [self.manager startUpdatingLocation];}/** 应用进入后台执行定位 保证进程不被系统kill */- (void)applicationDidEnterBackground:(UIApplication *)application {    UIApplication *app = [UIApplication sharedApplication];    __block  UIBackgroundTaskIdentifier bgTask;    bgTask = [app beginBackgroundTaskWithExpirationHandler:^{        dispatch_async(dispatch_get_main_queue(), ^{                        if (bgTask != UIBackgroundTaskInvalid){                bgTask = UIBackgroundTaskInvalid;            }        });    }];    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{        dispatch_async(dispatch_get_main_queue(), ^{            if (bgTask != UIBackgroundTaskInvalid){                bgTask = UIBackgroundTaskInvalid;            }        });    });            [self.manager startUpdatingLocation];}@end