问题：Xcode升级到11版本后报Unknown argument type 'attribute' in method -[RCTUIManager setJSResponder:blockNativeResponder:]. Extend RCTConvert to support this type

解决方案：
在 React/Base/RCTModuleMethod.mm 中找到RCTParseUnused 方法，修改为如下代码：

static BOOL RCTParseUnused(const char **input)
{
  return RCTReadString(input, "__attribute__((unused))") ||
     RCTReadString(input, "__attribute__((__unused__))") ||
     RCTReadString(input, "__unused");
}

参考：https://github.com/facebook/react-native/issues/25138