在使用GoogleSignin登录用户而不是呈现视图后,我想将用户重定向到视图
import React, { Component } from 'react';
import { AppRegistry, Platform, Text, Image, TouchableOpacity, View } from 'react-native'
import { StackNavigator, TabNavigator, NavigationActions } from 'react-navigation'
import { GoogleSignin, GoogleSigninButton } from 'react-native-google-signin'
import DashboardScreen from './Components/DashboardScreen'
// Routes
export const MyNavigator = StackNavigator({
DashboardScreen: {
name: 'DashboardScreen',
description: 'Dasboard available once logged in',
screen: DashboardScreen,
navigationOptions: {
title: 'Dashboard'
}
},
});
export default class MyApp extends Component {
//...
_signIn() {
GoogleSignin.signIn()
.then((user) => {
this.setState({
isLoggedIn: true,
user: user
})
// Redirect to screen here
})
.catch((err) => {
console.log('Signin error', err)
})
.done()
}
render() {
//...
}
}
我尝试了很多东西,我认为它应该是这样的:
const navigateAction = NavigationActions.navigate({
routeName: 'DashboardScreen',
params: { user: user.givenName }
})
this.props.navigation.dispatch(navigateAction)
但是控制台说this.props是未定义的。
你能帮忙吗?谢谢!
我猜this
里面的_signIn
不再是你的班级了,而是_signIn
函数。
为了使它工作,您可以将_signIn
修改为箭头函数:
_signIn = () => {
GoogleSignin.signIn()
.then((user) => {
this.setState({
isLoggedIn: true,
user: user
})
const navigateAction = NavigationActions.navigate({
routeName: 'DashboardScreen',
params: { user: user.givenName }
})
this.props.navigation.dispatch(navigateAction)
})
.catch((err) => {
console.log('Signin error', err)
})
.done()
}
以下是有关如何绑定this
:https://medium.freecodecamp.org/react-binding-patterns-5-approaches-for-handling-this-92c651b5af56的更多信息
您还可以查看其他几篇文章,因为它是React中的常见错误。
请在堆栈导航器中添加myApp并按照此操作
render() {
const { navigate } = this.props.navigation;
return(
// your code
<Button onPress={() => navigate({ routeName: 'DashboardScreen' ,params: { user:userData }}) />
);
}
并且你将使用它在DashboardScreen中获取userData。
this.props.navigation.state.params.user