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我需要帮助我得到这个错误在位置1的JSON中意外的标记o我已经试过翻阅文档和堆栈，仍然没有运气。响应有问题吗？React本地网络
'use strict'
import React,{Component} from 'react'
import {View,StyleSheet,Image,Text,TouchableOpacity,TextInput} from 'react-native'
import StatusBarBackground from './StatusBarBackground'
import TextBoxLayout from './loginComponents/textInput'
import Button from './loginComponents/button'
import IconIm from 'react-native-vector-icons/Ionicons'
class SignUp extends React.Component{
constructor(props) {
super(props);
this.state = {name: '',
password:'',
username:''};
}
_navigateToProfile(){
this.props.navigator.push({
indent:'Profile'
})
}
_updateServer(){
console.log("HEY ",this.state.name)
console.log(JSON.stringify({
email: this.state.name,
username: this.state.username,
password:this.state.password
}));
fetch('http://localhost:3000/endpoint/', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"email": this.state.username,
"username": this.state.username,
"password":this.state.password
})
}).then((response)=>response.json())
.then((responseJson)=>{
console.log(responseJson);
return responseJson
}) .catch((error) => { console.error(error); });
}
render(){
return(
<View style={styles.container}>
<StatusBarBackground/>
<View style={styles.top} >
<Text style={[styles.login,styles.lineHeight]}>Sign up</Text>
<TouchableOpacity style={styles.button}><Text style={styles.login}>SIGN UP WITH FACEBOOK</Text></TouchableOpacity>
<Text style={styles.login}>or</Text>
</View>
<View style={[styles.bot]}>
<View style={styles.sizer}>
<View style = {styles.textInput}>
<View style={[styles.ImgCon,styles.space]}>
<IconIm name='ios-mail' color="#dae0ea" size={25} style={styles.img}/>
</View>
<TextInput style={[styles.textbla,styles.space]} paceholderTextColor='white' placeholder='Enter Email'
onChangeText={(name) => {
this.setState({name})
}}/>
</View>
</View>
<View style={styles.sizer}>
<View style = {styles.textInput}>
<View style={[styles.ImgCon,styles.space]}>
<IconIm name='ios-person' color="#dae0ea" size={25} style={styles.img}/>
</View>
<TextInput style={[styles.textbla,styles.space]} paceholderTextColor='white' placeholder='Enter Username'
onChangeText={(username) => {
this.setState({username})
}}/>
</View>
</View>
<View style={styles.sizer}>
<View style = {styles.textInput}>
<View style={[styles.ImgCon,styles.space]}>
<IconIm name='ios-lock' color="#dae0ea" size={25} style={styles.img}/>
</View>
<TextInput style={[styles.textbla,styles.space]} paceholderTextColor='white' placeholder='Enter Password'
onChangeText={(password) => {
this.setState({password})
}}/>
</View>
</View>
<TouchableOpacity onPress ={()=>this._updateServer()}>
<Button text='signup'/>
</TouchableOpacity>
<TouchableOpacity onPress={()=>this._navigateToProfile()}>
<Text style ={{color:'white'}}>CLICK MEE</Text>
</TouchableOpacity>
</View>
</View>
)
}
}
const styles = StyleSheet.create({
container:{
flex:1,
alignItems:'center',
backgroundColor: '#181c26'
},
top:{
flex:2,
justifyContent:'space-between',
flexDirection:'column',
alignItems:'center',
},
sizer:{width:300,height:50},
bot:{
flex:7,
flexDirection:'column',
alignItems:'center'
},
lineHeight:{
lineHeight:60
},
button:{
width:300,
height:50,
backgroundColor:'#3B5998',
overflow:'hidden',
borderRadius:25,
alignItems:'center',
justifyContent:'center'
},
login:{
fontSize:20,fontWeight:'500',color:"#f7f7f7"
,fontFamily:'AvenirNextCondensed-Heavy'
},
input:{
flexDirection:'row',
justifyContent:'center',
borderRadius:10,
overflow:'hidden'
},
imgCon:{
alignItems:'center',
justifyContent:'center',
backgroundColor:'blue',
width:200
},
textInput:{
flex:7,
backgroundColor:'#353535'
},
textInput:{
flex:1,
flexDirection:'row',
backgroundColor:'#353535',
borderRadius:5,
overflow:'hidden'
},
space:{
justifyContent:'center',
alignItems:'center'
},
ImgCon:{
flex:2
},
textbla:{
flex:9,
color:'white'
}
})
module.exports = SignUp