Coloring in images transparent part in imageview
Question
The following images brown color part is transparent ,i tried coloring with the refrence http://www.edumobile.org/iphone/iphone-beginner-tutorials/digital-signature-application-in-iphone/ ,
Is it possible to coloring only at transparent part in the uiimage view?
2 answers
solution1
1 2012-11-15 17:34:40
一个非常简单的解决方案是在UIImageView后面有一个UIView ，确保UIImageView的背景设置为Clear，然后您就可以通过图像的透明区域查看背景视图中的内容。
solution2
0 2012-11-15 20:58:38
Check out Mike Ash's Implementing a Flood Fill and Optimizing Flood Fill . You'll have to swap out the NSGraphicsContext stuff for CGContext.
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