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Creating a Smudge tool effect in ipad apps

H开发者_StackOverflow社区ow to create a smudge tool effect in ipad apps using core graphics?.


Andy Finnell wrote a blog post about implementing smudge and stamp tools.

Some of the code uses Core Graphics; some of it uses AppKit, which is Mac-specific. Even so, it should be possible for you to port the AppKit bits to UIKit with a bit of work and documentation-checking.

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