startMonitoringLocationPushes of CLLocationManager is not returning

Question

When I call startMonitoringLocationPushesWithCompletion, the completion "callback" is never executed.

This is what we have done to prepare for this service:

We have the com.apple.developer.location.push in the entitlements file
Our request to use the location push service has been approved
We have enabled Location Push Service Extension in Certificates, Identifiers & Profiles of our app on developer.apple.com
We have the push notification and location update capabilities
The user has granted the app "Always" location access
We have these purpose strings in our info.plist already: NSLocationAlwaysAndWhenInUseUsageDescription, NSLocationAlwaysUsageDescription and NSLocationWhenInUseUsageDescription
We have the automatically generated location push service extension

Here is the code that we use to test the service:

#import <React/RCTLog.h>
#import <CoreLocation/CoreLocation.h>
#import "AppDelegate.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  if (@available(iOS 15.0, *)) {
    RCTLogInfo(@"Starting monitoring location pushes");
    CLLocationManager *locationManager = [[CLLocationManager alloc] init];
    [locationManager startMonitoringLocationPushesWithCompletion:^(NSData * _Nullable token, NSError * _Nullable error) {
      RCTLogInfo(@"Completion called");
      if (token) {
        NSString *tokenString = [NSString stringWithFormat:@"%@", token];
        RCTLogInfo(@"Token: %@", tokenString);
      }
      if (error){
        RCTLogError(@"Error: %@", error);
      }
      RCTLogInfo(@"Completion ends %@ %@", token, error);
    }];
    RCTLogInfo(@"End monitoring location pushes");
  } else {
    RCTLogError(@"Incompatible iOS version");
  }
  return YES;
}

The only logs:

2022-03-29 18:38:02.736615+0100 ***[yyy] [native] Starting monitoring location pushes
2022-03-29 18:38:02.738087+0100 ***[yyy] [native] End monitoring location pushes

Core Location

256

Posted by

EricHo73

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Answer 1

I don't know exactly how but it works after I put locationManager outside the @available block like this:

CLLocationManager *locationManager = [[CLLocationManager alloc] init];
if (@available(iOS 15.0, *)) {
  RCTLogInfo(@"Starting monitoring location pushes");
  [locationManager startMonitoringLocationPushesWithCompletion:^(NSData * _Nullable token, NSError * _Nullable error) {
    RCTLogInfo(@"Completion called");
    if (token) {
      NSString *tokenString = [NSString stringWithFormat:@"%@", token];
      RCTLogInfo(@"Token: %@", tokenString);
    }
    if (error){
      RCTLogError(@"Error: %@", error);
    }
    RCTLogInfo(@"Completion ends %@ %@", token, error);
  }];
  RCTLogInfo(@"End monitoring location pushes");
} else {
  RCTLogError(@"Incompatible iOS version");
}

Probably related to garbage collection?

P.S. As a react-native module you would also need to override methodQueue of RCTBridgeModule : (Swift)

extension MyModule {
  override var methodQueue: DispatchQueue {
    get {
      return DispatchQueue.main
    }
  }
  // ...
}

Posted by

EricHo73

var methodQueue is only available on RCTEventEmitter, so it can't be overridden if you only use RCTBridgeModule. Instead you use declare it like
extension MyModule { @objc var methodQueue: DispatchQueue { get { return DispatchQueue.main } } }
—
EricHo73

Add a Comment

Answer 2

I don't know exactly how but it works after I put locationManager outside the @available block like this:

CLLocationManager *locationManager = [[CLLocationManager alloc] init];
if (@available(iOS 15.0, *)) {
  RCTLogInfo(@"Starting monitoring location pushes");
  [locationManager startMonitoringLocationPushesWithCompletion:^(NSData * _Nullable token, NSError * _Nullable error) {
    RCTLogInfo(@"Completion called");
    if (token) {
      NSString *tokenString = [NSString stringWithFormat:@"%@", token];
      RCTLogInfo(@"Token: %@", tokenString);
    }
    if (error){
      RCTLogError(@"Error: %@", error);
    }
    RCTLogInfo(@"Completion ends %@ %@", token, error);
  }];
  RCTLogInfo(@"End monitoring location pushes");
} else {
  RCTLogError(@"Incompatible iOS version");
}

Probably related to garbage collection?

P.S. As a react-native module you would also need to override methodQueue of RCTBridgeModule : (Swift)

extension MyModule {
  override var methodQueue: DispatchQueue {
    get {
      return DispatchQueue.main
    }
  }
  // ...
}

Posted by

EricHo73

var methodQueue is only available on RCTEventEmitter, so it can't be overridden if you only use RCTBridgeModule. Instead you use declare it like
extension MyModule { @objc var methodQueue: DispatchQueue { get { return DispatchQueue.main } } }
—
EricHo73

Add a Comment

startMonitoringLocationPushes of CLLocationManager is not returning

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