如何在 React Native 中實現單選按鈕

Question

我正在將 React 代碼轉換為 React Native。 所以我需要實現單選按鈕。

Answer 1

您可以使用准系統 RN 非常輕松地模擬單選按鈕。 這是我使用的一個簡單實現。 根據需要調整大小、顏色等。 它看起來像這樣（具有不同的色調和一些文字）。 在頂部添加TouchableOpacity以將其變成可以執行某些操作的按鈕。

function RadioButton(props) {
  return (
      <View style={[{
        height: 24,
        width: 24,
        borderRadius: 12,
        borderWidth: 2,
        borderColor: '#000',
        alignItems: 'center',
        justifyContent: 'center',
      }, props.style]}>
        {
          props.selected ?
            <View style={{
              height: 12,
              width: 12,
              borderRadius: 6,
              backgroundColor: '#000',
            }}/>
            : null
        }
      </View>
  );
}

Answer 2

這是創建單選按鈕的另一種方式（來源，感謝 php step by step 頻道）

方法一

constructor(props) {
    super(props);
    this.state = {
        radioBtnsData: ['Item1', 'Item2', 'Item3'],
        checked: 0
    }
}

---

import { View, TextInput, TouchableOpacity } from 'react-native';

{this.state.radioBtnsData.map((data, key) => {
    return (
        <View key={key}>
            {this.state.checked == key ?
                <TouchableOpacity style={styles.btn}>
                    <Image style={styles.img} source={require("./img/rb_selected.png")}/>
                    <Text>{data}</Text>
                </TouchableOpacity>
                :
                <TouchableOpacity onPress={()=>{this.setState({checked: key})}} style={styles.btn}>
                    <Image style={styles.img} source={require("./img/rb_unselected.png")} />
                    <Text>{data}</Text>
                </TouchableOpacity>
            }
        </View>
    )
})}

---

const styles = StyleSheet.create({
    img:{
        height:20,
        width: 20
    },
    btn:{
        flexDirection: 'row'
    }
});

將下面的圖像放在img文件夾中

方法二

為新開發人員精心設計的 LaneRettig ex

感謝 Lane Rettig

constructor(props){
    super(props);
    this.state = {
      radioSelected: 1
    }
  }


  radioClick(id) {
    this.setState({
      radioSelected: id
    })
  }

  render() {

    const products = [{
      id: 1
    },
    {
      id: 2
    },
    {
      id: 3
    }];

    return (
      products.map((val) => {
        return (
          <TouchableOpacity key={val.id} onPress={this.radioClick.bind(this, val.id)}>
            <View style={{
              height: 24,
              width: 24,
              borderRadius: 12,
              borderWidth: 2,
              borderColor: '#000',
              alignItems: 'center',
              justifyContent: 'center',
            }}>
              {
                val.id == this.state.radioSelected ?
                  <View style={{
                    height: 12,
                    width: 12,
                    borderRadius: 6,
                    backgroundColor: '#000',
                  }} />
                  : null
              }
            </View>
          </TouchableOpacity>
        )
      })
    );
  }

Answer 3

有一個叫做react-native-radio-buttons的 react-native 組件可以做一些你需要的事情：

Answer 4

這是我使用功能組件的單選按鈕解決方案。

注意- 我已將圖像用於選中和未選中的單選圖標

import React, {useState} from 'react';
import {View, Text, StyleSheet, TouchableOpacity, Image} from 'react-native';

const Radio = () => {
  const [checked, setChecked] = useState(0);
  var gender = ['Male', 'Female'];
  return (
    <View>
      <View style={styles.btn}>
        {gender.map((gender, key) => {
          return (
            <View key={gender}>
              {checked == key ? (
                <TouchableOpacity style={styles.btn}>
                  <Image
                    style={styles.img}
                    source={require('../images/radio_Checked.jpg')}
                  />
                  <Text>{gender}</Text>
                </TouchableOpacity>
              ) : (
                <TouchableOpacity
                  onPress={() => {
                    setChecked(key);
                  }}
                  style={styles.btn}>
                  <Image
                    style={styles.img}
                    source={require('../images/radio_Unchecked.png')}
                  />
                  <Text>{gender}</Text>
                </TouchableOpacity>
              )}
            </View>
          );
        })}
      </View>
      {/* <Text>{gender[checked]}</Text> */}
    </View>
  );
};

const styles = StyleSheet.create({
  radio: {
    flexDirection: 'row',
  },
  img: {
    height: 20,
    width: 20,
    marginHorizontal: 5,
  },
  btn: {
    flexDirection: 'row',
    alignItems: 'center',
  },
});

export default Radio;

Answer 5

我在react-native使用Checkbox來創建單選按鈕。 請參考以下代碼。

constructor(props){
    super(props);
    this.state = {radioButton:'value1'};
}
render(){
    return(
        <View>
            <CheckBox 
                title='value1'
                checkedIcon='dot-circle-o'
                uncheckedIcon='circle-o'
                checked={this.state.radioButton === 'value1'}
                onPress={() => this.setState({radioButton: 'value1'})}
                ></CheckBox>
            <CheckBox 
                title='value2'
                checkedIcon='dot-circle-o'
                uncheckedIcon='circle-o'
                checked={this.state.radioButton === 'value2'}
                onPress={() => this.setState({radioButton: 'value2'})}
                ></CheckBox> 
            <CheckBox 
                title='value3'
                checkedIcon='dot-circle-o'
                uncheckedIcon='circle-o'
                checked={this.state.radioButton === 'value3'}
                onPress={() => this.setState({radioButton: 'value3'})}
                ></CheckBox> 
            <CheckBox 
                title='value4'
                checkedIcon='dot-circle-o'
                uncheckedIcon='circle-o'
                checked={this.state.radioButton === 'value4'}
                onPress={() => this.setState({radioButton: 'value4'})}
                ></CheckBox> 
            <CheckBox 
                title='value5'
                checkedIcon='dot-circle-o'
                uncheckedIcon='circle-o'
                checked={this.state.radioButton === 'value5'}
                onPress={() => this.setState({radioButton: 'value5'})}
                ></CheckBox>  

        </View>
    );
}

Answer 6

您可以使用 react-native-radio-input。 它的使用非常簡單。

import RadioGroup,{Radio} from "react-native-radio-input";
.
.
.
//Receive the checked value (ES6 syntax)
getChecked = (value) => {
// value = our checked value
alert(value)
}
 <RadioGroup getChecked={this.getChecked}>
  <Radio iconName={"lens"} label={"The first option"} value={"A"} />
  <Radio iconName={"lens"} label={"The first option"} value={"B"} />
  <Radio iconName={"lens"} label={"I need numbers"} value={1} />
  <Radio label={"Is IconName Optional?"} value={"Yes"} />
  <Radio label={"Show Sentence Value"} value={"This is a Sentence"} />
</RadioGroup>
.
.

Answer 7

也許您可以將樣式設置為圓形按鈕，例如單選按鈕或其他東西：

const period = [
      {
        key: 1,
        name : '1 Month',
        value : 1,

      },
      {
        key : 2,
        name : '12 Month',
        value : 12,

      }
    ];

    constructor(props) {
        super(props);
        this.state = {
          value: 0,
        };
      }

    onChangeTabs = (tabs) => {

        this.setState({
          value : tabs,

        })

      }

    renderTabs = () => {
        return period.map(item => (
          <TouchableWithoutFeedback
            key={item.key}
            value={item.value}
            onPress={this.onChangeTabs.bind(this, item.value)}
          >
            <View style={this.state.value == item.value ? styles.periodActive : styles.period}>
              <Text style={styles.periodText}>{item.name}</Text>
            </View>
          </TouchableWithoutFeedback>
        ));
      };


    const styles = StyleSheet.create({
    period: {
        borderRadius: 5,
        borderColor: '#fff',
        borderWidth: 1,

        marginHorizontal: 5,
      },
      periodActive: {
        backgroundColor: '#333',
      },
    });

Answer 8

import RadioForm, { RadioButton, RadioButtonInput, RadioButtonLabel } from 'react-native-simple-radio-button';
const radioProps = [
  { label: 'Male', value: false },
  { label: 'Female, value: true }
];



<View style={{ marginTop: 30 }}>
                <RadioForm
                  buttonColor={gray}
                  buttonSize={12}
                  radioStyle={{paddingTop:25}}
                  selectedButtonColor="#000000"
                  radio_props={radioProps}
                  initial={0}
                  animation={false}
                  onPress={(value) => setGender(value)}
                />
              </View>

Answer 9

我正在使用我自己的自定義單選按鈕組。它的樣式也可以自定義。

 // radio button component
import React, { useState } from 'react'
import { Text, TouchableOpacity, View } from 'react-native'

const RadioButtons = (props) => {
  const radioPress = () => {
props.setChecked(props?.item?.id)
  }
  return (
    <View style={{
  flexDirection: "row",
  alignItems: "center",
  justifyContent: "center",
  margin:5,
}}>

  <TouchableOpacity style={{
  }} onPress={radioPress}>

    <View style={[{
      height: 24,
      width: 24,
      borderRadius: 12,
      borderWidth: 2,
      borderColor: '#000',
      alignItems: 'center',
      justifyContent: 'center',
    }, props.style]}>
      {
        props?.checked == props?.item?.id ?
          <View style={{
            height: 12,
            width: 12,
            borderRadius: 6,
            backgroundColor: '#000',
          }} />
          : null
      }
    </View>
  </TouchableOpacity>
  <Text style={{
    marginLeft: 5,
    fontWeight:"500",
    fontSize:20,
    textTransform:"capitalize"

  }}>
    {props?.item?.label}
  </Text>

</View>
 )
}

export default RadioButtons

在任何地方使用，例如：

   <View style={{
                    flexDirection:"row",
                    flexWrap:"wrap",
                }}>
                    {
                        [{label:'male',id:0}, {label:'female',id:1}, 
   {label:'other',id:2}].map((item,i)=>{
                            return(
                                <RadioButtons key={i} item={item} checked= 
  {checked} setChecked={setChecked} />
                            ) 
                        })
                    }
                </View>

Answer 10

import React, { useState } from "react";
import { Ionicons } from "@expo/vector-icons";
import { View, Text, TouchableOpacity } from "react-native";

export default function RadioButton() {
const [radioButton, setRadioButton] = useState("Yes");
return (
  <View style={{ flexDirection: "row", justifyContent: "space-around" }}>
  <TouchableOpacity onPress={() => setRadioButton("Yes")}>
    <Text>
      <Ionicons name={ radioButton === "Yes" ? "radio-button-on" : "radio-button-off" } size={18} color="green" /> 
      Yes
    </Text>
  </TouchableOpacity>
    
  <TouchableOpacity onPress={() => setRadioButton("No")}>
    <Text>
      <Ionicons name={radioButton === "No" ? "radio-button-on" : "radio-button-off"} size={18} color="green" />
      No
    </Text>
  </TouchableOpacity>
  </View>
)}