最近使用真机调试加载UIWebView的时候忽然报错，令人费解。报错如下：
validateFunctionArguments:2819: failed assertion `MTLPixelFormat of texture [ (MTLPixelFormatRGBA16Unorm)] bound at index 0 is incompatible with texture parameter [MTLDataTypeHalf texture0[0]]. MTLPixelFormatRGBA16Unorm is compatible with texture data types type(s) ( float ).'
解决方案：Edit Scheme 做如下设置即可解决问题：
