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Text replacement - "<google>BUY_IOS3</google>" to "<htmlet>ios9_upgrade</htmlet>"
<googlehtmlet>BUY_IOS3ios9_upgrade</googlehtmlet>
The Cocoa Touch layer sits at the top of the iPhone OS stack and contains the frameworks that are most commonly used by iPhone application developers. Cocoa Touch is primarily written in Objective-C, is based on the standard Mac OS X Cocoa API and has been extended and modified to meet the needs of the iPhone.