反应本机自定义TextInput占位符

Question

I know you can dynamically change the Placeholder text and style, but can you create a custom Placeholder view all together?

This is what I'm trying to achieve:

Is it possible to do something like this?

Answer 1

I would suggest you to use custom style with the functional component.Create a functional component called RenderInput for which pass placeholder as props.

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

const RenderInput = ({ label , inputvalue,styleLabel, ipOnChangeText, placeholder}) => {
    const {inputStyle, labelStyle, containerStyle} = styles;
    return(
        <View style = {containerStyle}>
            <Text style= {styleLabel ? labelStyle : ""} >{label}</Text>
            <TextInput 
               autoCorrect={false}
               placeholder={placeholder}
               style= {inputStyle}
            />
        </View>
    );
 }

const styles ={
    inputStyle:{
        color: '#333',
        fontSize: 16,
        lineHeight: 23,  
        borderBottomColor: '#333',
        borderBottomWidth: 0.5,
        fontFamily: 'System',
    },
    labelStyle:{
        fontSize: 18,
        color: '#737373',
        paddingBottom: 10,
        fontFamily: 'System',
        position: 'relative',
        ':after': {
           content: '* ',
           position: absolute,
           left: 5,
           top: 0,
           color: '#bbb'
        }
    },
    containerStyle:{
        flexDirection: 'column',
        marginTop: 10,
        marginBottom: 10
    }
}
export { RenderInput };

Answer 2

Creat a componet with name MyTextInput like this:

class MyTextInput extends Component {
  constructor(props) {
    super(props);
    this.state = { placeholder: props.text.length == 0 }
    this.handleChange = this.handleChange.bind(this);
  }
  handleChange(ev) {
    this.setState({ placeholder: ev.nativeEvent.text.length == 0 }); 
    this.props.onChange && this.props.onChange(ev); 
  }
  render() {
    const { placeholderStyle, style, onChange, ...rest } = this.props;

    return <TextInput 
      {...rest} 
      onChange={this.handleChange}
      style={this.state.placeholder ? [style, placeholderStyle] : style}
      />
  }
}

and use this in another component:

import MyTextInput from '.../MyTextInput';

<MyTextInput 
  text={this.state.myText}
  style={{ fontFamily: "Your Font" }}
  placeholderStyle={{ fontFamily: "AnotherFont", borderColor: 'red' }}
/>

you can custom any component you want with this way.

Answer 3

You can do something like this

<TextInput 
  placeholder="YOUR TEXT"
  placeholderTextColor="#555555"
/>

OR of course you can create your own version of the component TextInput something that contains the custom placeholder on top of the TextInput and once the text change you hide the custom placeholder