[Post] Google APIs Client Library for Objective-C

_posts/2011-08-31-Google-APIs-for-Objective-C.markdown

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+--- 
+layout: post
+title: New Google APIs Client Library for Objective-C
+tags: [ios objective-c gdata]
+categories: blog
+---
+
+A while back, I wrote a [small tutorial on how to use Google's GData Client library for iPhone](http://johntwang.com/blog/2009/06/08/how-to-use-google-apis-with-iphone-sdk/). It's a pretty popular tutorial that constantly gets questions. Today, [Google announced a new version of the Google Data library for Objective-C](http://googlecode.blogspot.com/2011/08/new-objective-c-library-for-new.html). I'm pretty exicted about this for a couple of reasons. The [new Client library](http://code.google.com/p/google-api-objectivec-client/) utilizes JSON, which I'm a big fan of and it also the new [OAuth2 for authentication](http://googlecode.blogspot.com/2011/03/making-auth-easier-oauth-20-for-google.html).
+
+It looks just amazing.
+
+```
+#import "GTLBooks.h"
+
+GTLServiceBooks *service = [[GTLServiceBooks alloc] init];
+
+GTLQueryBooks *query = 
+  [GTLQueryBooks queryForVolumesListWithQ:@"Mark Twain"];
+query.filter = kGTLBooksFilterFreeEbooks;
+
+[service executeQuery:query
+    completionHandler:^(GTLServiceTicket *ticket,
+                        id object, NSError *error) {
+      // callback
+      if (error == nil) {
+        GTLBooksVolumes *results = object;
+        for (GTLBooksVolume *volume in results) {
+          NSLog(@"%@", volume.volumeInfo.title);
+        }
+      }
+    }];
+```
+
+And it also follows the [Google Objective-C Style Guide](http://google-styleguide.googlecode.com/svn/trunk/objcguide.xml) which I'm also a fan of.
+
+Check out the new version of the [Client library](http://code.google.com/p/google-api-objectivec-client/) at the Google Project page.
+
+I'm going to try and get a new updated tutorial in a couple of days.