我是这个平台的新手,这是我在这个平台上的第二天。我试图通过创建简单的登录、注册、新闻提要应用程序来自学它。我能够构建登录页面,但是在从 InputText 获取值时,它显示错误消息“不能同时指定值和子项”,我在这里发布我的 login.js 类
export default class LoginScreen extends Component {
constructor(props) {
super(props);
this.state = {
username: '',
password: ''
};
}
login = () => {
alert(this.state.username + " " + this.state.password);
}
render() {
return (
<View style={styles.container}>
<Image source={require('../images/hulk.jpg')} style={styles.backgroundimage}>
<View style={styles.content}>
<Image source={require('../images/logo.png')} style={styles.logo}>
</Image>
<View style={styles.inputcontainer}>
<TextInput underLineColorAndroid='transparent' style={styles.input} value={this.state.username} onChangeText={(username) => this.setState({ username })} placeholderText='username' > </TextInput>
<TextInput secureTextEntry={true} underLineColorAndroid='transparent' style={styles.input} value={this.state.password} onChangeText={(password) => this.setState({ password })} placeholderText='password' placeholderTextColor='black'> </TextInput>
</View>
<TouchableOpacity onPress={this.login} style={styles.buttonContainer}>
<Text style={styles.buttonText}>LOGIN</Text>
</TouchableOpacity>
</View>
</Image>
</View>
);
}
}
请让我知道我的代码哪里出错了
问候
最佳答案
你能试试这个吗
export default class LoginScreen extends Component {
constructor(props) {
super(props);
this.state = {username: '',password: ''};
}
login = () => {
alert(this.state.username + " " + this.state.password);
}
render() {
return (
<View style={styles.container}>
<Image source={require('../images/hulk.jpg')} style={styles.backgroundimage}>
<View style={styles.content}>
<Image source={require('../images/logo.png')} style={styles.logo}>
</Image>
<View style={styles.inputcontainer}>
<TextInput
underLineColorAndroid='transparent'
style={styles.input}
value={this.state.username}
onChangeText={(text) => this.setState({ username: text })}
placeholderText='username'/>
<TextInput
secureTextEntry={true}
underLineColorAndroid='transparent'
style={styles.input}
value={this.state.password}
onChangeText={(text) => this.setState({ password:text })}
placeholderText='password'
placeholderTextColor='black'/>
</View>
<TouchableOpacity onPress={this.login()} style={styles.buttonContainer}>
<Text style={styles.buttonText}>LOGIN</Text>
</TouchableOpacity>
</View>
</Image>
</View>
);
}
关于javascript - TextInput onChangeText 无法正常工作 React Native,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44064308/