Описание тега uiappearance
NoneI OS 5+ API for appearance customisation. You use the UIAppearance protocol to get the appearance proxy for a class. You customize the appearance of instances of a class by sending appearance modification messages to the class’s appearance proxy.
UIAppearance allows the appearance of views and controls to be consistently defined across the entire application.
UIAppearance is a protocol that returns a proxy that will forward any configuration to instances of a particular class.
API introduced in iOS 5 allowing convenient customisation of appearance properties for all instances of class by sending appearance specification messages to the class' appearance proxy..
Note: iOS applies appearance changes when a view enters a window, it doesn’t change the appearance of a view that’s already in a window. To change the appearance of a view that’s currently in a window, remove the view from the view hierarchy and then put it back.