Sharing on Facebook, Twitter and Google+

[FIXED]     Font of navbar.
[FIXED]     A few compile fixes.
[IMPROVED]  Made properties nonatomic.
[ADDED]     Support for facebook, twitter and google+ sharing.

External/google-plus-ios-sdk/OpenSource/GTL/GTLUtilities.h

@@ -0,0 +1,105 @@
+/* Copyright (c) 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#ifndef SKIP_GTL_DEFINES
+  #import "GTLDefines.h"
+#endif
+
+// helper functions for implementing isEqual:
+BOOL GTL_AreEqualOrBothNil(id obj1, id obj2);
+BOOL GTL_AreBoolsEqual(BOOL b1, BOOL b2);
+
+// Helper to ensure a number is a number.
+//
+// The GoogleAPI servers will send numbers >53 bits as strings to avoid
+// bugs in some JavaScript implementations.  Work around this by catching
+// the string and turning it back into a number.
+NSNumber *GTL_EnsureNSNumber(NSNumber *num);
+
+@interface GTLUtilities : NSObject
+
+//
+// String encoding
+//
+
+// URL encoding, different for parts of URLs and parts of URL parameters
+//
+// +stringByURLEncodingString just makes a string legal for a URL
+//
+// +stringByURLEncodingForURI also encodes some characters that are legal in
+// URLs but should not be used in URIs,
+// per http://bitworking.org/projects/atom/rfc5023.html#rfc.section.9.7
+//
+// +stringByURLEncodingStringParameter is like +stringByURLEncodingForURI but
+// replaces space characters with + characters rather than percent-escaping them
+//
++ (NSString *)stringByURLEncodingString:(NSString *)str;
++ (NSString *)stringByURLEncodingForURI:(NSString *)str;
++ (NSString *)stringByURLEncodingStringParameter:(NSString *)str;
+
+// Percent-encoded UTF-8
++ (NSString *)stringByPercentEncodingUTF8ForString:(NSString *)str;
+
+// Key-value coding searches in an array
+//
+// Utilities to get from an array objects having a known value (or nil)
+// at a keyPath
+
++ (NSArray *)objectsFromArray:(NSArray *)sourceArray
+                    withValue:(id)desiredValue
+                   forKeyPath:(NSString *)keyPath;
+
++ (id)firstObjectFromArray:(NSArray *)sourceArray
+                 withValue:(id)desiredValue
+                forKeyPath:(NSString *)keyPath;
+
+//
+// Version helpers
+//
+
++ (NSComparisonResult)compareVersion:(NSString *)ver1 toVersion:(NSString *)ver2;
+
+//
+// URL builder
+//
+
+// If there are already query parameters on urlString, the new ones are simple
+// appended after them.
++ (NSURL *)URLWithString:(NSString *)urlString
+         queryParameters:(NSDictionary *)queryParameters;
+
+// Allocate a global dictionary
++ (NSMutableDictionary *)newStaticDictionary;
+
+// Walk up the class tree merging dictionaries and return the result.
++ (NSDictionary *)mergedClassDictionaryForSelector:(SEL)selector
+                                        startClass:(Class)startClass
+                                     ancestorClass:(Class)ancestorClass
+                                             cache:(NSMutableDictionary *)cache;
+
+//
+// MIME Types
+//
+
+// Utility routine to convert a file path to the file's MIME type using
+// Mac OS X's UTI database
+#if !GTL_FOUNDATION_ONLY
++ (NSString *)MIMETypeForFileAtPath:(NSString *)path
+                    defaultMIMEType:(NSString *)defaultType;
+#endif
+
+@end