Question

我希望每X秒获得一次用户坐标我添加了进入app delegate的位置。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
...
locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    if([CLLocationManager locationServicesEnabled]){
        [self.locationManager startUpdatingLocation];
    }
...

这里我处理新的坐标

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *loc = [locations objectAtIndex:0];

    NSDate* eventDate = loc.timestamp;
    NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
    if (howRecent < 10)
    {
        CLLocation* location = [locations lastObject];

        double lat = location.coordinate.latitude;
        double lng = location.coordinate.longitude;
        NSLog(@"lat:%f lng:%f", lat, lng);
...

但是当应用程序处于后台时，我不知道如何继续获取iPhone坐标。我想我应该添加一些代码：

- (void)applicationDidEnterBackground:(UIApplication *)application...

但我不知道如何让位置变为现场？

Answer 1

在您的info.plist中：

R.Click - ＆gt;添加一行，然后选择Required background modes - ＆gt;在第0项中选择App registers for location updates

应用程序在后台时，每X秒获取一次用户坐标

1 个答案: