यह प्रश्न पोस्ट करने के 3 महीने बाद हो गया है। क्या आपने इसे अपने आप पहले से ही समझ लिया है?
मैंने आपका कोड आजमाया। मैंने कुछ NSLogsAppDelegate प्रतिनिधि कार्यों में और viewDidLoad में डाल दिया। इसके अलावा, AppDelegate कक्षा में, मैंने पृष्ठभूमि समय छोड़ा।
तो startUpdatingLocation पृष्ठभूमि में जाने से पहले कहा जाता है: startUpdatingLocation पृष्ठभूमि में जाने के बाद कहा जाता है
2016-08-18 01:22:52.355 test background GPS from StackOF[2267:745042] viewDidLoad
2016-08-18 01:22:52.376 test background GPS from StackOF[2267:745042] _locationManager.allowsBackgroundLocationUpdates = YES;
2016-08-18 01:22:52.382 test background GPS from StackOF[2267:745042] _locationManager requestAlwaysAuthorization
2016-08-18 01:22:52.410 test background GPS from StackOF[2267:745042] applicationDidBecomeActive
2016-08-18 01:22:52.469 test background GPS from StackOF[2267:745042] viewDidAppear
2016-08-18 01:23:03.361 test background GPS from StackOF[2267:745042] [_locationManager startUpdatingLocation];
2016-08-18 01:23:03.362 test background GPS from StackOF[2267:745042] start updating location, _locationManager.allowsBackgroundLocationUpdates == YES
2016-08-18 01:23:03.382 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 65.000000
2016-08-18 01:23:03.630 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 1743.000000
2016-08-18 01:23:03.709 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 1743.000000
2016-08-18 01:23:03.716 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 1743.000000
2016-08-18 01:23:03.720 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 1743.000000
2016-08-18 01:23:03.814 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 65.000000
2016-08-18 01:23:05.004 test background GPS from StackOF[2267:745042] inner block [[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];
2016-08-18 01:23:05.005 test background GPS from StackOF[2267:745042] inner block start updating location, _locationManager.allowsBackgroundLocationUpdates == YES
2016-08-18 01:23:08.287 test background GPS from StackOF[2267:745042] applicationDidEnterBackground. Background time left: 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000
2016-08-18 01:23:10.319 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 65.000000
2016-08-18 01:23:19.321 test background GPS from StackOF[2267:745042] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 65.000000
/****
Keep on polling...
****/
हैं: पृष्ठभूमि समय छोड़ दिया की
2016-08-18 01:34:29.023 test background GPS from StackOF[2285:747132] viewDidLoad
2016-08-18 01:34:29.030 test background GPS from StackOF[2285:747132] _locationManager.allowsBackgroundLocationUpdates = YES;
2016-08-18 01:34:29.033 test background GPS from StackOF[2285:747132] _locationManager requestAlwaysAuthorization
2016-08-18 01:34:29.047 test background GPS from StackOF[2285:747132] applicationDidBecomeActive
2016-08-18 01:34:29.104 test background GPS from StackOF[2285:747132] viewDidAppear
2016-08-18 01:34:31.612 test background GPS from StackOF[2285:747132] applicationDidEnterBackground. Background time left: 179.964144
2016-08-18 01:34:40.004 test background GPS from StackOF[2285:747132] [_locationManager startUpdatingLocation];
2016-08-18 01:34:40.006 test background GPS from StackOF[2285:747132] start updating location, _locationManager.allowsBackgroundLocationUpdates == YES
2016-08-18 01:34:40.290 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 10.000000
2016-08-18 01:34:40.332 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 355.117789
2016-08-18 01:34:40.336 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 355.118536
2016-08-18 01:34:40.493 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 355.141209
2016-08-18 01:34:40.496 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 355.147748
2016-08-18 01:34:40.505 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 355.148158
2016-08-18 01:34:40.507 test background GPS from StackOF[2285:747132] Lat/Long: <redacted GPS coordinates>, horizontal accuracy: 65.000000
2016-08-18 01:34:41.640 test background GPS from StackOF[2285:747132] inner block [[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];
2016-08-18 01:34:41.642 test background GPS from StackOF[2285:747132] inner block start updating location, _locationManager.allowsBackgroundLocationUpdates == YES
/****
stops polling...
****/
लें टिप्पणी। यदि CLLocationManager स्थान अपडेट करना प्रारंभ करने से पहले ऐप पृष्ठभूमि में जाता है, तो पृष्ठभूमि का समय शेष 3 मिनट होता है। मैं खुद को भी यकीन नहीं कर रहा हूं क्योंकि मेरे पास भी अपनी जीपीएस पृष्ठभूमि चल रही समस्या है, लेकिन इस संक्षिप्त परीक्षण से ऐसा लगता है कि ऐप पृष्ठभूमि से ऐप्पल जाने से पहले CLLocationManager को कॉल किया जाना चाहिए था।
यहाँ जहां मैं अपने NSLogs डाल:
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSLog(@"viewDidLoad");
_locationManager = [[CLLocationManager alloc] init];
if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_8_3)
{
_locationManager.allowsBackgroundLocationUpdates = YES;
NSLog(@"_locationManager.allowsBackgroundLocationUpdates = YES;");
}
_locationManager.delegate = self;
_locationManager.activityType = CLActivityTypeOther;
_locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
_locationManager.distanceFilter = kCLDistanceFilterNone;
[_locationManager requestAlwaysAuthorization];
NSLog(@"_locationManager requestAlwaysAuthorization");
// Creating a background task to delay the start of the startUpdatingLocation
__block UIBackgroundTaskIdentifier taskIdentifier = UIBackgroundTaskInvalid;
taskIdentifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
[[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];
NSLog(@"[[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];");
}];
// Delaying the call to startUpdatingLocation 10 seconds, enough time to dismiss the application
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(10 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[_locationManager startUpdatingLocation];
NSLog(@"[_locationManager startUpdatingLocation];");
if(_locationManager.allowsBackgroundLocationUpdates == YES)
{
NSLog(@"start updating location, _locationManager.allowsBackgroundLocationUpdates == YES");
}
else
{
NSLog(@"start updating location, _locationManager.allowsBackgroundLocationUpdates == NO");
}
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];
NSLog(@"inner block [[UIApplication sharedApplication] endBackgroundTask:taskIdentifier];");
if(_locationManager.allowsBackgroundLocationUpdates == YES)
{
NSLog(@"inner block start updating location, _locationManager.allowsBackgroundLocationUpdates == YES");
}
else
{
NSLog(@"inner block start updating location, _locationManager.allowsBackgroundLocationUpdates == NO");
}
});
});
}
CLLocationManager प्रतिनिधि समारोह:
-(void)locationManager:(CLLocationManager *) manager didUpdateLocations:(nonnull NSArray<CLLocation *> *)locations
{
CLLocation *location = [locations firstObject];
NSLog(@"Lat/Long: %f %f, horizontal accuracy: %f",
location.coordinate.latitude,
location.coordinate.longitude,
location.horizontalAccuracy);
}
AppDelegate:
- (void)applicationDidEnterBackground:(UIApplication *)application {
NSLog(@"applicationDidEnterBackground. Background time left: %f", [[UIApplication sharedApplication] backgroundTimeRemaining]);
}
टी एल; डॉ: startUpdatingLocation बुला की कोशिशमें ठीक हैया ऐपडिलेगेट में application:didFinishLaunchingWithOptions:
मुझे एक ही समस्या मिलती है। मेरे मामले में, स्थान काफी लंबे समय तक चल सकते हैं, या बस कुछ ही सेकंड बंद हो जाते हैं, या फिर शुरू नहीं होते हैं। पृष्ठभूमि में स्थान शुरू करते समय भी पृष्ठभूमि कार्य को चालू रखने की कोशिश करता हूं लेकिन कोई भाग्य नहीं है ... – nahung89