update README.md

Author: burt

README.md

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 Learning OpenGLES 2 for Android is written in Java language. There is an OpenGL ES 2.0 Tutorial at [https://www.raywenderlich.com/69983/video-tutorial-beginner-opengl-es-glkit-part-0-introduction](https://www.raywenderlich.com/69983/video-tutorial-beginner-opengl-es-glkit-part-0-introduction). This tutorial is really great! If you have to learn the opengl es 2.0, you'd like to watch the opengl es 2.0 video tutorial whatever you are iOS developer or Android developer. But This tutorial's example was written in ObjectiveC. So I've made the examples in Java while I am following the tutorial. I've excepted last four examples for making game in 3D. 
 
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+* There is a `LearningOpenGLES2-iOS` : [https://github.com/skyfe79/LearningOpenGLES2](https://github.com/skyfe79/LearningOpenGLES2)
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 ## Hello OpenGL
 
 ![](01.HelloOpenGL/result.png)