show events in Firebase Debug View for debug build

Author: AGulev

Diff for: firebase/src/firebase_ios.mm

@@ -84,6 +84,13 @@ bool SetOption(const char* key, const char* value) {
     }
 
     void Initialize() {
+#if defined(DM_DEBUG)
+        // add this values provide opportunity to see events in Firebase Debug View
+        NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
+        [defaults setBool:YES forKey:@"/google/firebase/debug_mode"];
+        [defaults setBool:YES forKey:@"/google/measurement/debug_mode"];
+        [defaults synchronize];
+#endif
         @try {
             if(![FIRApp defaultApp]) {
                 if (!firOptions) {