Add warning about missing UIBackgroundModes

Author: zoontek

example/ios/Podfile.lock

@@ -301,7 +301,7 @@ DEPENDENCIES:
   - Yoga (from `../node_modules/react-native/ReactCommon/yoga`)
 
 SPEC REPOS:
-  https://github.com/cocoapods/specs.git:
+  https://github.com/CocoaPods/Specs.git:
     - boost-for-react-native
 
 EXTERNAL SOURCES:
@@ -435,6 +435,6 @@ SPEC CHECKSUMS:
   RNVectorIcons: 0bb4def82230be1333ddaeee9fcba45f0b288ed4
   Yoga: 14927e37bd25376d216b150ab2a561773d57911f
 
-PODFILE CHECKSUM: ec8fe71d38ad340f719e72f6450303b56c99944c
+PODFILE CHECKSUM: 70f55b4fbde93d4bb26d3fe0576d9f0813e81c72
 
-COCOAPODS: 1.7.5
+COCOAPODS: 1.8.1

example/ios/RNPermissionsExample.xcodeproj/project.pbxproj

@@ -109,7 +109,7 @@
 				13B07F8C1A680F5B00A75B9A /* Frameworks */,
 				13B07F8E1A680F5B00A75B9A /* Resources */,
 				00DD1BFF1BD5951E006B06BC /* Bundle React Native code and images */,
-				7BFDA05E75F4BA8ABC64EEC3 /* [CP] Copy Pods Resources */,
+				D15EC6C7ABF193B661727531 /* [CP] Copy Pods Resources */,
 			);
 			buildRules = (
 			);
@@ -202,7 +202,7 @@
 			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
 			showEnvVarsInLog = 0;
 		};
-		7BFDA05E75F4BA8ABC64EEC3 /* [CP] Copy Pods Resources */ = {
+		D15EC6C7ABF193B661727531 /* [CP] Copy Pods Resources */ = {
 			isa = PBXShellScriptBuildPhase;
 			buildActionMask = 2147483647;
 			files = (

ios/RNPermissions.m

@@ -247,7 +247,15 @@ + (void)flagAsRequested:(NSString * _Nonnull)handlerId {
 
 + (bool)isBackgroundModeEnabled:(NSString * _Nonnull)mode {
   NSArray *modes = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UIBackgroundModes"];
-  return [modes isKindOfClass:[NSArray class]] && [modes containsObject:mode];
+  bool isEnabled = [modes isKindOfClass:[NSArray class]] && [modes containsObject:mode];
+
+#if RCT_DEV
+  if (!isEnabled) {
+    RCTLogWarn(@"Missing \"%@\" in \"UIBackgroundModes\" forces check / request result to \"unavailable\" status", mode);
+  }
+#endif
+
+  return isEnabled;
 }
 
 RCT_REMAP_METHOD(openSettings,