我是本机反应的新手。我目前尝试使用Laravel API设置react-native的登录名。我使用的API已经过测试及其工作。但是，当我尝试放入react-native时，它在我调用API时显示了错误。 模拟器中的警告是： 可能的未处理的承诺拒绝（id：0）： TypeError：网络请求失败
这是我的代码。
import React, { Component } from 'react';
import {
StyleSheet,
View,
TextInput,
Text,
TouchableOpacity,
Alert,
AsyncStorage,
} from 'react-native';
import {Actions} from 'react-native-router-flux';
import Logo from '../components/Logo';
export default class Login extends Component {
constructor(props) {
super(props);
this.state = {
email: "",
password: ""
}
};
signup(){
Actions.signup()
}
home(){
Actions.home()
}
handleLogin = () => {
fetch('http://localhost:8888/api/login',{
method: 'POST',
header:{
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
email: this.state.email,
password: this.state.password,
})
})
.then((response) => response.json())
.then((res) => {
if (res.success === true){
alert(res.message)
}else{
alert(res.message)
}
alert('test')
})
}
render() {
return (
<View style={styles.container}>
<Logo/>
<View style={styles.inputContainer}>
<TextInput style={styles.inputBox}
underlineColorAndroid='0,0,0,0'
placeholder='Email'
placeholderTextColor= 'grey'
keyboardType= 'email-address'
onChangeText={(text) => this.setState({email:text})}
onSubmitEditing={()=> this.password.focus()}
/>
<TextInput style={styles.inputBox}
underlineColorAndroid='0,0,0,0'
placeholder='Password'
placeholderTextColor= 'grey'
secureTextEntry= {true}
ref={(input) => this.password = input}
onChangeText={(text) => this.setState({password:text})}
/>
<TouchableOpacity style={styles.button} onPress={this.handleLogin}>
<Text style={styles.buttonText}>Login</Text>
</TouchableOpacity>
</View>
<View style={styles.signupText}>
<Text>Don't have an account? </Text>
<TouchableOpacity onPress={this.signup}>
<Text style={styles.signupButton}>Signup</Text>
</TouchableOpacity>
</View>
</View>
);
}
}
有人知道出什么问题吗？