使用 AFNetworking 3 在后台以及 运行 应用程序中将当前位置发送到服务器

Question

我试着搜索了很多，但没有得到我想要的确切答案。

我的问题是

当应用处于 运行 以及在后台运行时，我能否将用户的当前位置发送到服务器。

例如： 在我的应用程序中，我想每 2 分钟存储一次用户的当前位置，然后将他的当前位置发送到 server.as，就像用户移动 50 次一样米内不到2min便也。 我怎样才能做到这一点 ？我可以在后台模式和前台模式下向服务器发送位置更新吗？如果是那么怎么办？

我试过如下方式：

 self.locations = [[NSMutableArray alloc] init];
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.distanceFilter = 10;

self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
self.locationManager.delegate = self;
[self.locationManager requestAlwaysAuthorization];

[self.locationManager startUpdatingLocation];

...

- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
       fromLocation:(CLLocation *)oldLocation
{



 // Add another annotation to the map.
MKPointAnnotation *annotation = [[MKPointAnnotation alloc] init];
annotation.coordinate = newLocation.coordinate;
[self.map addAnnotation:annotation];

// Also add to our map so we can remove old values later
[self.locations addObject:annotation];

// Remove values if the array is too big
while (self.locations.count > 1)
{
    annotation = [self.locations objectAtIndex:0];
    [self.locations removeObjectAtIndex:0];

    // Also remove from the map
    [self.map removeAnnotation:annotation];
}


if (UIApplication.sharedApplication.applicationState == UIApplicationStateActive)
{
    // determine the region the points span so we can update our map's zoom.
    double maxLat = -91;
    double minLat =  91;
    double maxLon = -181;
    double minLon =  181;

    for (MKPointAnnotation *annotation in self.locations)
    {
        CLLocationCoordinate2D coordinate = annotation.coordinate;

        if (coordinate.latitude > maxLat)
            maxLat = coordinate.latitude;
        if (coordinate.latitude < minLat)
            minLat = coordinate.latitude;

        if (coordinate.longitude > maxLon)
            maxLon = coordinate.longitude;
        if (coordinate.longitude < minLon)
            minLon = coordinate.longitude;
    }

    MKCoordinateRegion region;
    region.span.latitudeDelta  = (maxLat +  90) - (minLat +  90);
    region.span.longitudeDelta = (maxLon + 180) - (minLon + 180);

    _latitude1=[NSString stringWithFormat:@"Latitude:%f",newLocation.coordinate.latitude];
    _longitude1=[NSString stringWithFormat:@"Longitude:%f",newLocation.coordinate.longitude];


    AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    appDelegate.fetchtokenString1 = [NSString stringWithString:_latitude1];
    appDelegate.fetchedriveridString1 = [NSString stringWithString:_longitude1];





    NSLog(@"%@",_latitude1);
    NSLog(@"%@",_longitude1);


    // the center point is the average of the max and mins
    region.center.latitude  = minLat + region.span.latitudeDelta / 2;
    region.center.longitude = minLon + region.span.longitudeDelta / 2;

    // Set the region of the map.
    [self.map setRegion:region animated:YES];
}
else
{
    NSLog(@"App is backgrounded. New location is %@", newLocation);
}

提前致谢..

Answer 1

当您的应用 运行 在前台时检查此项。

How can I get current location from user in iOS

选中此项以在您的应用程序处于后台时发送位置。

获取经纬度后，使用AFNetworking框架发送。

或

如果您不知道如何获取位置而需要从头开始，请按照以下步骤获取经纬度。

在 info.pList

中的两种字符串类型下方添加

然后在您的项目中添加 CoreLocation Framework。

将其导入您的 ViewController.h

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

 @interface ViewController : UIViewController<CLLocationManagerDelegate> 
 @property(nonatomic, retain) CLLocationManager *locationManager;

 @end

然后在你的 ViewController.m

中做以下一项

 #define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)

 #import "ViewController.h"

 @interface ViewController ()

 @end

 @implementation ViewController

 - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.

self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
#ifdef __IPHONE_8_0
if(IS_OS_8_OR_LATER) {
    // Use one or the other, not both. Depending on what you put in info.plist
    [self.locationManager requestWhenInUseAuthorization];
    [self.locationManager requestAlwaysAuthorization];
}
#endif
[self.locationManager startUpdatingLocation];


}

-(void)viewWillAppear:(BOOL)animated {

NSLog(@"latitude: %f, longitude: %f",self.locationManager.location.coordinate.latitude,self.locationManager.location.coordinate.longitude);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

日志会显示经纬度。