React Native- 模拟器正常真机出现跨域问题

https://github.com/facebook/react-native/issues/17618,react 自测解决办法：git 缘由是react-native版本  0.52.1的缘由，将版本降为0.51.0github Simply downgrading to React-Native 0.51.0 (by just runningnpm i -S react-native@0.

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