Failed to load http://xxx:8081/index.delta?platform=ios&dev=true&minify=false: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8081' is therefore not allowed access. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled

[wuyunqiang]

下载安装chrome插件 Allow-Control-Allow-Origin: *
参考：https://stackoverflow.com/questions/48445514/react-native-js-debugger-issues-with-cors-ios