ReactNative短信驗(yàn)證碼倒計(jì)時(shí)控件
功能
根據(jù)項(xiàng)目的需要罚攀，需要寫(xiě)一個(gè)自定義的控件，實(shí)現(xiàn)如下功能：
- 默認(rèn)文字為點(diǎn)擊獲取驗(yàn)證碼
- 點(diǎn)擊后出現(xiàn)60秒的倒計(jì)時(shí)
- 顏色孤页，字號(hào)可調(diào)
- 倒計(jì)時(shí)過(guò)程中医增，再次點(diǎn)擊需要忽略掉
- 倒計(jì)時(shí)完成后文本恢復(fù)成點(diǎn)擊獲取驗(yàn)證碼
- 再幾次點(diǎn)擊同之前
其實(shí)說(shuō)了這么多，就是個(gè)最普通的驗(yàn)證碼的功能裸扶。。搬素。
效果
效果圖如下：(錄的圖片比較一般呵晨，對(duì)付著看吧)
實(shí)現(xiàn)原理
自己封裝了個(gè)控件，它內(nèi)部含有一個(gè)Text控件熬尺，然后我們又寫(xiě)了一個(gè)timer摸屠，然后負(fù)責(zé)倒計(jì)時(shí)，然后每次都需要判斷一下是否繼續(xù)粱哼，然后加了一個(gè)flag字段季二，判斷是否接受下次點(diǎn)擊事件，當(dāng)?shù)褂?jì)時(shí)結(jié)束之后還需要將初始狀態(tài)重置回去即可。
代碼
控件代碼
import React, {Component } from 'react';
import {
StyleSheet,
Text,
View,
Image,
TextInput,
TouchableHighlight,
StatusBar,
Alert,
AppRegistry
} from 'react-native';
import LinkRow from '../components/LinkRow';
import cStyles from '../styles/CommonStyle';
import axios from 'axios';
class MyCountTime extends Component {
constructor(props) {
super(props);
let timeLeft = this.props.timeLeft > 0 ? this.props.timeLeft : 5;
let width = this.props.width || 100;
let height = this.props.height || 50;
let color = this.props.color || '#42A5F5';
let fontSize = this.props.fontSize || 30;
let fontWeight = this.props.fontWeight || '600';
let borderColor = this.props.borderColor || '#42A5F5';
let borderWidth = this.props.borderWidth || 1;
let borderRadius = this.props.borderRadius || 4;
let backgroundColor = this.props.backgroundColor || '#42A5F5';
let begin = 0;
let press = this.props.press;
this.afterEnd = this.props.afterEnd || this._afterEnd;
this.style = this.props.style;
this.state = {
timeLeft: timeLeft,
begin: begin
};
this.countTextStyle = {
textAlign: 'center',
color: '#42A5F5',
fontSize: fontSize,
fontWeight: fontWeight
};
this.countViewStyle = {
backgroundColor: backgroundColor,
alignItems: 'center',
borderColor: borderColor,
borderWidth: borderWidth,
borderRadius: borderRadius,
width: width,
height: height
}
}
countdownfn(timeLeft, callback, begin) {
if (timeLeft > 0) {
this.state.begin = 1;
console.log("===lin===>");
let that = this;
let interval = setInterval(function () {
if (that.state.timeLeft < 1) {
clearInterval(interval);
callback(that)
} else {
let totalTime = that.state.timeLeft;
that.setState({
timeLeft: totalTime - 1
})
}
}, 1000)
}
}
_beginCountDown() {
if (this.state.begin === 1){
return;
}
let time = this.state.timeLeft;
console.log("===lin===> time " + time);
let afterEnd = this.afterEnd;
let begin = this.state.begin;
console.log("===lin===> start " + begin);
this.countdownfn(time, afterEnd, begin)
}
_afterEnd(that) {
console.log('------------time over');
that.setState({
begin : 0,
timeLeft : 5,
})
}
componentDidMount() {
}
render() {
return (
<View style={{position:'absolute',top:13,right:43,height:30}}>
<Text
onPress={this._beginCountDown.bind(this)}
style={{color: '#42A5F5', fontSize: 17,height:40 , zIndex:999}}> { this.state.begin === 0 ? '點(diǎn)擊獲取驗(yàn)證碼' : this.state.timeLeft} </Text>
</View>
)
}
}
應(yīng)用代碼
<MyCountTime timeLeft={5}>
</MyCountTime>
當(dāng)然這只是胯舷，最簡(jiǎn)單的應(yīng)用的代碼刻蚯，我們還提供了很多的自定義的屬性，大家可以根據(jù)自己項(xiàng)目的需要桑嘶，去調(diào)節(jié)這些參數(shù)芦倒。
由于最近剛開(kāi)始認(rèn)真的搞RN，可能有一些封裝的不是最佳實(shí)踐不翩，還是希望大家多提意見(jiàn)，和大家一起進(jìn)步吧麻裳。
