android - 在 React Native 中取消焦点文本输入

Question

我正在使用 React Native 构建一个 Android 应用。

如何强制 TextInput 为“unFocus”，这意味着光标在文本字段内闪烁。 isFocused() 和 onFocus() 有函数，但我实际上如何让文本字段放弃焦点。您会认为一旦我按 Enter 键，它就会自动执行此操作，但事实并非如此。

   import React, {Component} from 'react';
   import { AppRegistry, Text, View, StyleSheet, TextInput, TouchableOpacity} 
   from 'react-native';

   var SHA256 = require("crypto-js/sha256");

   export default class LoginForm extends Component{


constructor(props){
    super(props);
    this.state = {
        email: '',
        password:''
    };
}

tryLogin = () => {
    if(this.state.email=="email123" && this.state.password == "password"){
        console.log("password verified");
        this.props.navigator.replace({
            title: 'Dashboard'
        });
    }

    console.log(this.state.email);
    console.log(this.state.password);
    console.log("Hash" + SHA256(this.state.password));
}

render(){
    return(
        <View style={styles.container}>
            <TextInput 
                style={styles.input}

                placeholder="Email address" 
                placeholderTextColor="white"
                onChangeText={(email) => this.setState({email})}>
            </TextInput>
            <TextInput style={styles.input} 
                placeholder="Password" 
                placeholderTextColor="white" 
                secureTextEntry
                onChangeText={(password) => this.setState({password})}>
            </TextInput>

            <TouchableOpacity style={styles.loginButtonContainer} onPress={this.tryLogin}>
                <Text style={styles.loginButtonText}>LOGIN</Text>
            </TouchableOpacity>
        </View>
  );
}
}

AppRegistry.registerComponent('LoginForm', () => LoginForm);

const styles =  StyleSheet.create({
container: {
    padding: 20
},
input:{
    height: 40,
    backgroundColor: '#e74c3c',
    marginBottom: 20,
    color: 'white',
    paddingHorizontal: 15,
    opacity: .9
},
loginButtonContainer:{
    justifyContent: 'center',
    backgroundColor: '#bc4c3c',
    paddingVertical:15

},
loginButtonText:{
    textAlign:'center',
    color:'white',
    fontWeight: '700',
    fontSize: 24

}

   })

这对于真实用户来说可能并不重要，但我只是在模拟，如果我想重新加载它会很烦人。

Answer 1

更好的方法是使用 ScrollView 和 Keyboard.dismiss。当用户在 textInput 之外点击时使用 ScrollView，键盘会关闭。这样做是因为 ScrollView 的默认属性 keyboardShouldPersistTaps 是 never。这是用户期望的行为。为了关闭键盘，或者等效地模糊 textInput，当用户点击登录按钮时，将 Keyboard.dismissed() 添加到 tryLogin功能。

import React, {Component} from 'react';
import { AppRegistry, Text, View, StyleSheet, TextInput, TouchableOpacity, ScrollView, Keyboard}
  from 'react-native';
var SHA256 = require("crypto-js/sha256");

export default class LoginForm extends Component{


  constructor(props){
    super(props);
    this.state = {
      email: '',
      password:''
    };
  }

  tryLogin = () => {
    Keyboard.dismiss();
    if(this.state.email=="email123" && this.state.password == "password"){
      console.log("password verified");
      this.props.navigator.replace({
        title: 'Dashboard'
      });
    }

    console.log(this.state.email);
    console.log(this.state.password);
    console.log("Hash" + SHA256(this.state.password));
  }

  render(){
    return(
      <ScrollView style={styles.container}>
        <TextInput
          style={styles.input}

          placeholder="Email address"
          placeholderTextColor="white"
          onChangeText={(email) => this.setState({email})}>
        </TextInput>
        <TextInput style={styles.input}
                   placeholder="Password"
                   placeholderTextColor="white"
                   secureTextEntry
                   onChangeText={(password) => this.setState({password})}>
        </TextInput>

        <TouchableOpacity style={styles.loginButtonContainer} onPress={this.tryLogin}>
          <Text style={styles.loginButtonText}>LOGIN</Text>
        </TouchableOpacity>
      </ScrollView>
    );
  }
}

AppRegistry.registerComponent('LoginForm', () => LoginForm);

const styles =  StyleSheet.create({
  container: {
    padding: 20
  },
  input:{
    height: 40,
    backgroundColor: '#e74c3c',
    marginBottom: 20,
    color: 'white',
    paddingHorizontal: 15,
    opacity: .9
  },
  loginButtonContainer:{
    justifyContent: 'center',
    backgroundColor: '#bc4c3c',
    paddingVertical:15

  },
  loginButtonText:{
    textAlign:'center',
    color:'white',
    fontWeight: '700',
    fontSize: 24

  }

})