A new Objective-C library for a new generation of APIs

Four years ago, we introduced an Objective-C library for Google Data APIs. At first, it supported a scant three services - Google Base, Calendar, and Spreadsheets. Perhaps more surprising is that it was written just for Mac applications; the iPhone SDK was still a year off. In the years since, the library has grown to support 16 APIs, and has been used in many hundreds of applications. In a fine example of unforeseen consequences, most of those applications run not on the Mac but on iOS.

The Google Data APIs were built on XML and the Atom Publishing Protocol, a reasonable industry standard for the time. But mobile, low-power, and bandwidth-limited computers are now the biggest audience for client software. Across the Internet, XML and AtomPub have given way to the lighter-weight JSON data interchange format.

Other fundamental changes have also shifted the API landscape. Password-based authentication is being supplanted by the more secure and flexible OAuth 2 standard. The number of APIs has grown dramatically, making it impractical to hand-craft data classes for all APIs and all languages. When services offer API improvements, developers want access to those changes as quickly as possible.

To support this evolving world, we are introducing a brand new library for Cocoa developers, the Google APIs Client Library for Objective-C. The library supports recent Google JSON APIs, including Tasks, Latitude, Books, URL Shortener, and many others. It is designed to make efficient use of the device’s processor and memory, so it’s a great fit for iOS applications.

Read more: Google code blog
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