Add support for App Extensions

- Added simple detection method to check wether the SDK runs in an extension
- BITCrashManager will send crash reports without UI (UIAlertViews aren't allowed in extensions anyway)
- Don't start BITUpdateManager, BITStoreUpdateManager, BITFeedbackManager and BITAuthenticator in app extensions

Classes/BITCrashManager.m

@@ -919,7 +919,10 @@ static PLCrashReporterCallbacks plCrashCallbacks = {
  * - Send pending approved crash reports
  */
 - (void)invokeDelayedProcessing {
-  if ([[UIApplication sharedApplication] applicationState] != UIApplicationStateActive) return;
+  if (!bit_isRunningInAppExtension() &&
+      [[UIApplication sharedApplication] applicationState] != UIApplicationStateActive) {
+    return;
+  }
   
   BITHockeyLog(@"INFO: Start delayed CrashManager processing");
   
@@ -945,7 +948,7 @@ static PLCrashReporterCallbacks plCrashCallbacks = {
       _lastCrashFilename = [notApprovedReportFilename lastPathComponent];
     }
 
-    if (!BITHockeyBundle()) {
+    if (!BITHockeyBundle() || bit_isRunningInAppExtension()) {
       [self sendNextCrashReport];
     } else if (_crashManagerStatus != BITCrashManagerStatusAutoSend && notApprovedReportFilename) {
       

Classes/BITHockeyHelper.h

@@ -48,6 +48,7 @@ NSString *bit_UUID(void);
 NSString *bit_appAnonID(void);
 BOOL bit_isPreiOS7Environment(void);
 BOOL bit_isPreiOS8Environment(void);
+BOOL bit_isRunningInAppExtension(void);
 
 NSString *bit_validAppIconStringFromIcons(NSBundle *resourceBundle, NSArray *icons);
 NSString *bit_validAppIconFilename(NSBundle *bundle, NSBundle *resourceBundle);

Classes/BITHockeyHelper.m

@@ -260,6 +260,17 @@ BOOL bit_isPreiOS8Environment(void) {
   return isPreiOS8Environment;
 }
 
+BOOL bit_isRunningInAppExtension(void) {
+  static BOOL isRunningInAppExtension = NO;
+  static dispatch_once_t checkAppExtension;
+  
+  dispatch_once(&checkAppExtension, ^{
+    isRunningInAppExtension = [[[NSBundle mainBundle] executablePath] containsString:@".appex/"];
+  });
+  
+  return isRunningInAppExtension;
+}
+
 /**
  Find a valid app icon filename that points to a proper app icon image
  

Classes/BITHockeyManager.m

@@ -242,6 +242,11 @@ bitstadium_info_t bitstadium_library_info __attribute__((section("__TEXT,__bit_h
   }
 #endif /* HOCKEYSDK_FEATURE_CRASH_REPORTER */
   
+  // App Extensions can only use BITCrashManager, so ignore all others automatically
+  if (bit_isRunningInAppExtension()) {
+    return;
+  }
+  
 #if HOCKEYSDK_FEATURE_STORE_UPDATES
   // start StoreUpdateManager
   if ([self isStoreUpdateManagerEnabled]) {