Ios 定期更新后台位置

我觉得我已经读了很多关于这个问题的帖子，很多答案都不一样，这让事情变得非常困难

简而言之，我希望在后台更新用户位置，并定期（理想情况下每90秒到5分钟）将结果上传到API。在一些挖掘之后，我会定期更新位置，但当我调用一个NSOject类时问题就会出现，该类反过来在didUpdateToLocation中运行一个NSURLSessionDataTask（只有在NSDate过期时才会执行，因此不是每次调用该方法时都会执行），它会对整个过程进行计时

通过测试，我发现设备通常会运行此方法两次，然后失败。我猜是因为操作系统让应用程序安静下来，因为电话太重了

下面是我的位置方法和AppDelegate方法的外观

AppDelege

-(void)applicationWillEnterForeground:(UIApplication *)application {
    [self applicationUpdateLocationStatus:true];

}

-

-

定位对象

-(void)queryNearby:(CLLocation *)location completion:(void (^)(NSError *error, NSArray *content))completion {

    [[NSOperationQueue mainQueue] addOperationWithBlock:^{                       
            sessionConfigure = [NSURLSessionConfiguration defaultSessionConfiguration];
            session = [NSURLSession sessionWithConfiguration:sessionConfigure delegate:nil delegateQueue:[NSOperationQueue mainQueue]];

            sessionURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@user/usernearby.php" ,APP_BASE_URL]];
            sessionTask = [session dataTaskWithURL:sessionURL completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
            //COMPLETION HANDLER OUTPUT 

            }];

            [sessionTask resume];

     }];

}

注意：从其他帖子中，启动和停止locationManager显然是关键

-(void)locationApplicationStatus:(BOOL)forground {
    [self.locationManager stopUpdatingLocation];
    [self.locationManager setDesiredAccuracy:kCLLocationAccuracyThreeKilometers];
    [self.locationManager setDistanceFilter:5];
    [self.locationManager setPausesLocationUpdatesAutomatically:false];
    [self.locationManager setActivityType:CLActivityTypeOther];
    [self.locationManager startUpdatingLocation];

}

在这里，我尝试使用

startMonitoringSignificantLocationChanges

，但更新不够频繁，同样的问题仍然存在

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
    [self.locationManager stopUpdatingLocation];

}

-

附近的对象

-(void)queryNearby:(CLLocation *)location completion:(void (^)(NSError *error, NSArray *content))completion {

    [[NSOperationQueue mainQueue] addOperationWithBlock:^{                       
            sessionConfigure = [NSURLSessionConfiguration defaultSessionConfiguration];
            session = [NSURLSession sessionWithConfiguration:sessionConfigure delegate:nil delegateQueue:[NSOperationQueue mainQueue]];

            sessionURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@user/usernearby.php" ,APP_BASE_URL]];
            sessionTask = [session dataTaskWithURL:sessionURL completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
            //COMPLETION HANDLER OUTPUT 

            }];

            [sessionTask resume];

     }];

}

---

注意：我已经调用了

[self.locationManager requestAlwaysAuthorization]当应用程序启动且用户已授予权限时
 您正在
applicationIdentinterbackground
和
applicationUpdateLocationStatus
中启动长时间运行的后台任务，但在这两种情况下都不会结束后台任务，因此这将导致您耗尽后台执行时间。@Paulw11我应该在哪里调用它？在完成处理程序之后？不，只要您完成了后台任务，那么在数据会话完成之后
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    self.nearby = [[NearbyObject alloc] init];

    self.currentLatitude = newLocation.coordinate.latitude;
    self.currentLongitude = newLocation.coordinate.longitude;
    self.currentAccuracy = newLocation.horizontalAccuracy;

    [self.nearby queryNearby:[[CLLocation alloc] initWithLatitude:self.currentLatitude longitude:self.currentLongitude] completion:^(NSError *error, NSArray *content) {
        //SAVE RETURN DATA HERE & EXPIRY
    }];


}

-(void)queryNearby:(CLLocation *)location completion:(void (^)(NSError *error, NSArray *content))completion {

    [[NSOperationQueue mainQueue] addOperationWithBlock:^{                       
            sessionConfigure = [NSURLSessionConfiguration defaultSessionConfiguration];
            session = [NSURLSession sessionWithConfiguration:sessionConfigure delegate:nil delegateQueue:[NSOperationQueue mainQueue]];

            sessionURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@user/usernearby.php" ,APP_BASE_URL]];
            sessionTask = [session dataTaskWithURL:sessionURL completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
            //COMPLETION HANDLER OUTPUT 

            }];

            [sessionTask resume];

     }];

}