Re: drawRect is erasing view
Re: drawRect is erasing view
- Subject: Re: drawRect is erasing view
- From: "Kyle Sluder" <email@hidden>
- Date: Thu, 14 Aug 2008 16:51:19 -0400
On Thu, Aug 14, 2008 at 4:42 PM, <email@hidden> wrote:
> I'm trying to do some animation where each time drawRect is called it's
> drawing over what was previously drawn, but something is erasing the view.
> I've setBackgroundColor for the window to clearColor so it's no longer
> drawing the default stripes but now it's erasing to black.
Two things:
1) If you do not completely fill your view with drawing, you must
override -isOpaque to return NO.
2) When -drawRect: is called, you are responsible for drawing anything
and everything that should be drawn in that rectangle. You cannot
make any assumptions that anything is left in there from a previous
drawing operation.
--Kyle Sluder
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