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 "===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 "htmlcode">

<MyCountTime timeLeft={5}>

</MyCountTime>



当然这只是，最简单的应用的代码，我们还提供了很多的自定义的属性，大家可以根据自己项目的需要，去调节这些参数。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。