I have react-native/graphql/apollo app.用户发出请求以从服务器获取凭据,并在通过 async/await 将其写入钥匙串后获取凭据。如果成功,用户必须从身份验证导航到主屏幕。我使用 .then 在钥匙串异步/等待之后进行导航。有人可以告诉我这是一个好方法还是我不需要使用.then?
const AuthScreen = ({ navigation }) => {
const sign = useMutation(SIGN_IN)
const handleSignIn = code => {
sign({
variables: { code },
update: async (cache, { data }) => {
const accessToken = data.signIn.accessToken
const refreshToken = data.signIn.refreshToken
await Keychain.setGenericPassword(accessToken, refreshToken)
}
}).then(() => navigation.navigate('Home'))
}
const getToken = async () => {
// setLoading(true)
RNAccountKit.configure({
responseType: 'code',
initialPhoneCountryPrefix: '+7',
initialPhoneNumber: '9855316514',
defaultCountry: 'RU'
})
const payload = await RNAccountKit.loginWithPhone()
console.log('payload.code', payload.code)
handleSignIn(payload.code)
}
const { container } = styles
return (
<View style={container}>
<Text>Put your phone number for Login</Text>
<Button title="Login" onPress={getToken} />
</View>
)
}
Async/await 只是 Promise 的合成糖。这:
const handleSignIn = code => {
sign({
variables: { code },
update: async (cache, { data }) => {
const accessToken = data.signIn.accessToken
const refreshToken = data.signIn.refreshToken
await Keychain.setGenericPassword(accessToken, refreshToken)
}
}).then(() => navigation.navigate('Home'))
}
而这个
const handleSignIn = async (code) => {
await sign({
variables: { code },
update: async (cache, { data }) => {
const accessToken = data.signIn.accessToken
const refreshToken = data.signIn.refreshToken
await Keychain.setGenericPassword(accessToken, refreshToken)
}
})
return navigation.navigate('Home')
}
做同样的事情。Async/await 只是让代码更易于阅读和推理。