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→Creating the UIView Subclass
Double click on the ''draw2DViewController.xib'' file so that it loads into the Interface Builder tool and select the UIView component in the View window. Display the Identity Inspector (''Tools -> Identity Inspector'' or press the ''Command+4'' key combination) and change the Class setting from UIView to our new class named draw2D:
<google>IOSBOX</google>
[[Image:iphone_draw_2d_uiview_class_change.jpg|Changing the base class of a UIView component]]
