Xcode11 Unknown argument type '__attribute__' in method

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解决方法：

node_modules/react-native/React/Base/RCTModuleMethod.mm

其中的方法修改成下面这样：

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