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react nativeでapiたたいたら[AxiosError: Network Error]が出てきたので修正する

Posted at

修正前

try {
  console.log("try to create user");
  await axios({
    method: 'post',
    url: 'http://localhost:5050/api/v1/users',
    data: jsonData,
  }).then((response) => {
    console.log(response.data);
  }).catch(error => console.log(error));
} catch (ex: any) {
  console.error("ex", ex);
}

修正後

try {
  console.log("try to create user");
  await axios({
    method: 'post',
    url: 'http://10.0.2.2:5050/api/v1/users',
    data: jsonData,
  }).then((response) => {
    console.log(response.data);
  }).catch(error => console.log(error));
} catch (ex: any) {
  console.error("ex", ex);
}

解説編

👆こちらに以下のような表があります!

スクリーンショット 2022-10-25 23.16.18.png

エミュレーターからするとlocalhostとはエミュレーター自身のことで、普段のweb開発で使用するlocalhost(127.0.0.1)で使うような開発マシンは「10.0.2.2」となります!
これで解決できるわけですね!

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