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Possible Duplicate:
Subclassing UIView to draw in Quartz
Hello i am searching good example how to draw something on UIView, UIScrollView … using QuartzCore.
For first try i want to draw a triangle or even a line on some view. Is it possible this implement in UIVIewController ?
Thanks.
The easiest way is to subclass a UIView, have your UIViewController add an instance of the subclass as a visible sub view, and call setNeedsDisplay on it. Then, when the drawRect method of your UIView subclass gets called, do your quartz drawing on the context given.