React Native 适配XCode11.3

在下面那个目录，报错__attribute__ 不识别

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

只需要找到当前类实现文件，找到RCTParseUnused函数，做以下修改

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

就可以了