iOS MKMapView 后台定位

MKMapView 定位

进入前台可以使用 MKMapView 定位并画线

 mapView.mapType = MKMapTypeStandard;
  mapView.delegate = self;
//表示用定位
  mapView.showsUserLocation = YES;

代理

//通过这个更新用户定位数据
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation

//画线
- (MKPolyline *)polylineForLocations:(NSArray *)locations {
    CLLocationCoordinate2D coordinates[locations.count];
    for (int i = 0; i < locations.count; i++) {
        CLLocation *location = locations[i];
        coordinates[i] = location.coordinate;
    }
    
    return [MKPolyline polylineWithCoordinates:coordinates count:locations.count];
}

但是进入后台定位后，MKMapView就不起作用了，必须用到CLLocationManager

后台定位 CLLocationManager

 self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;
    if ([UIDevice currentDevice].systemVersion.floatValue >= 9.0) {
        //允许后台定位
        [self.locationManager setAllowsBackgroundLocationUpdates:YES];
    }
    // 精确度最佳
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
//    self.locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;//导航级别的精确度
    //位置管理器专门为其他类型的大型交通工具导航，而不是汽车导航 CLActivityTypeOtherNavigation
    ////位置管理器专门为步行、跑步、骑自行车等健身时，提供导航
    self.locationManager.activityType = CLActivityTypeFitness;
    
    self.locationManager.pausesLocationUpdatesAutomatically = NO; //不允许自动暂停刷新
    self.locationManager.distanceFilter = kCLDistanceFilterNone;  //不需要移动都可以刷新

代理

//用户定位获取， 这里有个坑，如果是国内的App就是这里的定位信息需要转成国内，不然定位信息对不上
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations

+(CLLocationCoordinate2D)transformFromWGSToGCJ:(CLLocationCoordinate2D)wgsLoc
{
    CLLocationCoordinate2D adjustLoc;
//    if([self isLocationOutOfChina:wgsLoc]){
//        adjustLoc = wgsLoc;
//    }else{
        double adjustLat = [self transformLatWithX:wgsLoc.longitude - 105.0 withY:wgsLoc.latitude - 35.0];
        double adjustLon = [self transformLonWithX:wgsLoc.longitude - 105.0 withY:wgsLoc.latitude - 35.0];
        double radLat = wgsLoc.latitude / 180.0 * pi;
        double magic = sin(radLat);
        magic = 1 - ee * magic * magic;
        double sqrtMagic = sqrt(magic);
        adjustLat = (adjustLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
        adjustLon = (adjustLon * 180.0) / (a / sqrtMagic * cos(radLat) * pi);
        adjustLoc.latitude = wgsLoc.latitude + adjustLat;
        adjustLoc.longitude = wgsLoc.longitude + adjustLon;
//    }
    return adjustLoc;
}

//获取授权弹框处理逻辑
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
    switch (status) {
        case kCLAuthorizationStatusNotDetermined:
            // 请求定位权限
            if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
                [self.locationManager requestAlwaysAuthorization];
            }
            
            break;
        case kCLAuthorizationStatusRestricted:
        case kCLAuthorizationStatusDenied:
            if (self.locationBlock) {
                self.locationBlock(NO);
            }
            break;
        case kCLAuthorizationStatusAuthorizedAlways:
        case kCLAuthorizationStatusAuthorizedWhenInUse:
            if (self.locationBlock) {
                self.locationBlock(YES);
            }
            break;
        default:
            if (self.locationBlock) {
                self.locationBlock(NO);
            }
            break;
    }
}

后台定位后，进入前台需要将后台定位信息画上去
这里用到监听切换前后台通知

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationWillEnterForeground:) name:UIApplicationWillEnterForegroundNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(applicationDidEnterBackground:) name:UIApplicationDidEnterBackgroundNotification object:nil];

-(void)applicationWillEnterForeground:(NSNotification *)noti {
    NSLog(@"进入前台");
    if (self.isSportMap) {
        mapView.showsUserLocation = YES;
        [self.locationManager stopUpdatingLocation];
        [self drawRoute];
        
    }
}

 

-(void)applicationDidEnterBackground:(NSNotification *)noti{
    NSLog(@"进入后台");
    if (self.isSportMap) {
        mapView.showsUserLocation = NO;
        [self.locationManager requestAlwaysAuthorization];
        [self.locationManager startUpdatingLocation];
    }

}