Added a .clang-format file which conforms to the Google Obj-C style guide: https://google.github.io/styleguide/objcguide.xml

Reformatted code according to it :)
Also made a minor change to the FirebaseUIChat example

Author: asciimike

.clang-format

@@ -0,0 +1,4 @@
+BasedOnStyle: Google
+ColumnLimit: 100
+BinPackParameters: false
+AllowAllParametersOfDeclarationOnNextLine: true

FirebaseUI/API/FirebaseArray.h

@@ -36,24 +36,27 @@
 @class FDataSnapshot;
 
 /**
- * FirebaseArray provides an array structure that is synchronized with a Firebase reference or query. It is useful for building custom data structures or sources, and provides the base for FirebaseDataSource.
+ * FirebaseArray provides an array structure that is synchronized with a Firebase reference or
+ * query. It is useful for building custom data structures or sources, and provides the base for
+ * FirebaseDataSource.
  */
 @interface FirebaseArray : NSObject
 
 /**
- * The delegate object that array changes are surfaced to, which conforms to the [FirebaseArrayDelegate Protocol](FirebaseArrayDelegate).
+ * The delegate object that array changes are surfaced to, which conforms to the
+ * [FirebaseArrayDelegate Protocol](FirebaseArrayDelegate).
  */
-@property (weak, nonatomic) id<FirebaseArrayDelegate> delegate;
+@property(weak, nonatomic) id<FirebaseArrayDelegate> delegate;
 
 /**
  * The query on a Firebase reference that provides data to populate the instance of FirebaseArray.
  */
-@property (strong, nonatomic) FQuery *query;
+@property(strong, nonatomic) FQuery *query;
 
 /**
  * The delegate object that array changes are surfaced to.
  */
-@property (strong, nonatomic) NSMutableArray __GENERIC(FDataSnapshot *) *snapshots;
+@property(strong, nonatomic) NSMutableArray __GENERIC(FDataSnapshot *) * snapshots;
 
 #pragma mark -
 #pragma mark Initializer methods
@@ -99,10 +102,13 @@
 #pragma mark Private API methods
 
 /**
- * Returns an index for a given object's key (that matches the object's key in the corresponding Firebase reference).
+ * Returns an index for a given object's key (that matches the object's key in the corresponding
+ * Firebase reference).
  * @param key The key of the desired object
  * @return The index of the object for which the key matches or -1 if the key is null
- * @exception FirebaseArrayKeyNotFoundException Thrown when the desired key is not in the FirebaseArray, likely indicating that the FirebaseArray is no longer being properly synchronized with the Firebase database.
+ * @exception FirebaseArrayKeyNotFoundException Thrown when the desired key is not in the
+ * FirebaseArray, likely indicating that the FirebaseArray is no longer being properly synchronized
+ * with the Firebase database.
  */
 - (NSUInteger)indexForKey:(NSString *)key;
 

FirebaseUI/API/FirebaseArrayDelegate.h

@@ -27,40 +27,53 @@
  */
 
 /**
- * A protocol to allow instances of FirebaseArray to raise events through a delegate. Raises all Firebase events except FEventTypeValue.
+ * A protocol to allow instances of FirebaseArray to raise events through a delegate. Raises all
+ * Firebase events except FEventTypeValue.
  */
 
-@protocol FirebaseArrayDelegate <NSObject>
+@protocol FirebaseArrayDelegate<NSObject>
 
 @optional
 
 /**
- * Delegate method which is called whenever an object is added to a FirebaseArray. On a FirebaseArray synchronized to a Firebase reference, this corresponds to an [FEventTypeChildAdded](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types) event being raised.
+ * Delegate method which is called whenever an object is added to a FirebaseArray. On a
+ * FirebaseArray synchronized to a Firebase reference, this corresponds to an
+ * [FEventTypeChildAdded](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types)
+ * event being raised.
  * @param object The object added to the FirebaseArray
  * @param index The index the child was added at
  */
-- (void) childAdded:(id)object atIndex:(NSUInteger)index;
+- (void)childAdded:(id)object atIndex:(NSUInteger)index;
 
 /**
- * Delegate method which is called whenever an object is chinged in a FirebaseArray. On a FirebaseArray synchronized to a Firebase reference, this corresponds to an [FEventTypeChildChanged](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types) event being raised.
+ * Delegate method which is called whenever an object is chinged in a FirebaseArray. On a
+ * FirebaseArray synchronized to a Firebase reference, this corresponds to an
+ * [FEventTypeChildChanged](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types)
+ * event being raised.
  * @param object The object that changed in the FirebaseArray
  * @param index The index the child was changed at
  */
-- (void) childChanged:(id)object atIndex:(NSUInteger)index;
+- (void)childChanged:(id)object atIndex:(NSUInteger)index;
 
 /**
- * Delegate method which is called whenever an object is removed from a FirebaseArray. On a FirebaseArray synchronized to a Firebase reference, this corresponds to an [FEventTypeChildRemoved](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types) event being raised.
+ * Delegate method which is called whenever an object is removed from a FirebaseArray. On a
+ * FirebaseArray synchronized to a Firebase reference, this corresponds to an
+ * [FEventTypeChildRemoved](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types)
+ * event being raised.
  * @param object The object removed from the FirebaseArray
  * @param index The index the child was removed at
  */
-- (void) childRemoved:(id)object atIndex:(NSUInteger)index;
+- (void)childRemoved:(id)object atIndex:(NSUInteger)index;
 
 /**
- * Delegate method which is called whenever an object is moved within a FirebaseArray. On a FirebaseArray synchronized to a Firebase reference, this corresponds to an [FEventTypeChildMoved](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types) event being raised.
+ * Delegate method which is called whenever an object is moved within a FirebaseArray. On a
+ * FirebaseArray synchronized to a Firebase reference, this corresponds to an
+ * [FEventTypeChildMoved](https://www.firebase.com/docs/ios/guide/retrieving-data.html#section-event-types)
+ * event being raised.
  * @param object The object that has moved locations in the FirebaseArray
  * @param fromIndex The index the child is being moved from
  * @param toIndex The index the child is being moved to
  */
-- (void) childMoved:(id)object fromIndex:(NSUInteger)fromIndex toIndex:(NSUInteger)toIndex;
+- (void)childMoved:(id)object fromIndex:(NSUInteger)fromIndex toIndex:(NSUInteger)toIndex;
 
 @end