[RN] React Native 获取验证码 按钮

 React Native 获取验证码 按钮

效果如图：

 

实现方法：

一、获取验证码 按钮组件 封装

CountDownButton.js

"use strict";

import React from 'react';
import PropTypes from 'prop-types';

import {
    View,
    Text,
    TouchableOpacity,
    ViewPropTypes, StyleSheet
} from 'react-native';

const defaultShowText = '获取验证码';
export default class CountDownButton extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            timerCount: this.props.timerCount || 60,
            timerTitle: this.props.timerTitle || defaultShowText,
            counting: false,
            selfEnable: true,
        };
        this._shouldStartCount = this._shouldStartCount.bind(this);
        this._countDownAction = this._countDownAction.bind(this);
    }

    static propTypes = {
        style: ViewPropTypes.style,
        textStyle: Text.propTypes.style,
        onClick: PropTypes.func,
        disableColor: PropTypes.string,
        timerTitle: PropTypes.string,
        enable: PropTypes.oneOfType([PropTypes.bool, PropTypes.number]),
        timerEnd: PropTypes.func,
        timerActiveTitle: PropTypes.array,
        executeFunc: PropTypes.func
    };

    _countDownAction() {
        const codeTime = this.state.timerCount;
        const {timerActiveTitle, timerTitle} = this.props;
        const now = Date.now();
        const overTimeStamp = now + codeTime * 1000 + 100;
        /*过期时间戳（毫秒） +100 毫秒容错*/
        this.interval = setInterval(() => {
            const nowStamp = Date.now();
            if (nowStamp >= overTimeStamp) {
                this.interval && clearInterval(this.interval);
                this.setState({
                    timerCount: codeTime,
                    timerTitle: timerTitle || defaultShowText,
                    counting: false,
                    selfEnable: true
                });
                if (this.props.timerEnd) {
                    this.props.timerEnd()
                }
            } else {
                const leftTime = parseInt((overTimeStamp - nowStamp) / 1000, 10);
                let activeTitle = `重新获取(${leftTime}s)`;
                if (timerActiveTitle) {
                    if (timerActiveTitle.length > 1) {
                        activeTitle = timerActiveTitle[0] + leftTime + timerActiveTitle[1]
                    } else if (timerActiveTitle.length > 0) {
                        activeTitle = timerActiveTitle[0] + leftTime
                    }
                }
                this.setState({
                    timerCount: leftTime,
                    timerTitle: activeTitle,
                })
            }
        }, 1000)
    }

    _shouldStartCount(shouldStart) {
        if (this.state.counting) {
            return
        }
        if (shouldStart) {
            this._countDownAction();
            this.setState({counting: true, selfEnable: false})
        } else {
            this.setState({selfEnable: true})
        }
    }

    componentDidMount() {
        const {executeFunc} = this.props;
        executeFunc && executeFunc(this._shouldStartCount);
    }

    componentWillUnmount() {
        clearInterval(this.interval)
    }

    render() {
        const {onClick, style, textStyle, enable, disableColor} = this.props;
        const {counting, timerTitle, selfEnable} = this.state;
        return (
            <View style={[{ 90, height: 34}, style]}>
                <TouchableOpacity
                    activeOpacity={counting ? 1 : 0.8}
                    onPress={() => {
                        if (!counting && enable && selfEnable) {

                            this.setState({selfEnable: false});
                            onClick(this._shouldStartCount)
                        }
                    }}
                    style={[styles.container,
                        {backgroundColor: ((!counting && enable && selfEnable) ? 'red' : disableColor || '#ccc')}
                    ]}
                >
                    <Text
                        style={[
                            styles.defaultText,
                            textStyle,
                        ]}>{timerTitle}</Text>
                </TouchableOpacity>
            </View>
        )
    }
}

const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        borderWidth: 0.5,
        borderRadius: 5,
        borderColor: "white",
    },
    defaultText: {
        fontSize: 14,
        color: "white",
    }
});

使用：

import React, {Component} from "react";
import {StyleSheet, View,} from 'react-native';
import CountDownButton from './CountDownButton';

export default class TestButton extends Component {
    constructor(props) {
        super(props);
        this.state = {}
    }

    render() {

        return (
            <View style={{flex: 1}}>

                <CountDownButton enable={true}
                                 timerCount={10}
                                 onClick={(_shouldStartCount) => {
                                     _shouldStartCount(true)
                                 }}/>

            </View>
        );

    }
}

本博客地址： wukong1688

本文原文地址：https://www.cnblogs.com/wukong1688/p/11031600.html

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