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iOS 马赛克画笔一种实现思路

先看下效果:

GIF

功能:

  • 能实现马赛克画笔功能,并提供多种马赛克图案层叠测试
  • 实现了重做，撤销功能
  • 实现了对原图做处理功能，并不是失真保存图案
  • 优化了处理时 CPU 占用太高问题

关于项目

  • 本项目只是作为一个 DEMO 演示,并不是一个控件封装。简单说下思路:使用 CAShapeLayer 与 mask 实现实时马赛克预览, 使用 core graphic 实现每一笔画完之后生成马赛克图。下面提供了思路具体实现文章，有兴趣同学可以自己封装一个控件使用。
  • 另外，因为只是作演示做法,项目中的 撤销 与 重做 功能，使用的是内存缓存。最好的做法其实就是每画完一笔，生成的原图马赛克，做沙盒储存，减少内存消耗!!

思路可参考下面文章👇 ：

马赛克画笔思路传送门

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