正在跳转至 https://github.com/SunshineBrother/JHBlog/blob/master/iOS%E7%9F%A5%E8%AF%86%E7%82%B9/iOS%E5%A4%A7%E6%9D%82%E7%83%A9/%E5%8A%A8%E7%94%BB/drawRect/drawRect%E4%B8%BA%E4%BB%80%E4%B9%88%E5%AF%BC%E8%87%B4CPU%E9%A3%99%E5%8D%87.md