Chapter 15. Drawing
Many UIView subclasses, such as a UIButton or a UITextField, know how to draw themselves; sooner or later, though, you’re going to want to do some drawing of your own. A class like UIImageView will display a static image; you can generate that image dynamically by drawing it in code. And a pure UIView does little or no drawing of its own; you can draw its appearance.
Drawing is not difficult, but it is a very large topic. This chapter will make you comfortable with the basic principles, so that you can consult and understand Apple’s documentation when you need further details.
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