any method that has 'shared' or 'current' in front. http://developer.apple.com/library/ios/#documentation/uikit/reference/UIDevice_Class/Reference/UIDevice.htm

any method that has 'shared' or 'current' in front. http://developer.apple.com/library/ios/#documentation/uikit/reference/UIDevice_Class/Reference/UIDevice.html http://developer.apple.com/library/ios/#documentation/uikit/... It is almost everwhere. [MyClass sharedMyclass] is the Objective-C equivalent of getInstance() Also, singletons make good sense in mobile apps, as it is a very different type of a beast than a server side app.