首页 > 代码库 > 计时器60s
计时器60s
计时器是经常用到的功能,下面以react nativ的例子简介来写一个倒计时60s的小demo。
代码如下:
import React, { Component } from ‘react‘; import { Text, View, TouchableOpacity } from ‘react-native‘; import { Button, Content, Container, Header, InputGroup, Input, List, ListItem, Thumbnail, Title, } from ‘native-base‘; import MyTheme from ‘../../themes/myTheme‘; import SetNewPasswordView from ‘./../login-register/set-newPassword-view‘ export default class FindPasswordView extends Component { constructor(props) { super(props); this.state = { data: 60, sendButton: true }; this._index = 60; this._timer = null; } countTime() { this.setState({sendButton: false}); this._timer = setInterval(()=> { this.setState({data: this._index--}); if (this.state.data <= 0) { this._timer && clearInterval(this._timer); this.setState({sendButton: true}); } }, 1000); } componentWillUnmount() { this._timer && clearInterval(this._timer); } _navigate(name, component, role, type = ‘Normal‘) { this.props.navigator.push({ component: component, name: name, passProps: { name: name, role: role }, onPress: this._onPress, rightText: ‘右边‘, type: type }) } render() { return ( <Container theme={MyTheme}> <Header> <Button transparent onPress={()=>this.props.navigator.pop()}> <Text style={{color:‘#35b873‘}}>取消</Text> </Button> <Title>找回密码</Title> </Header> <Content style={{backgroundColor:‘#eff2f3‘}}> <View style={{flex:1,flexDirection:‘row‘,backgroundColor:‘#fff‘,marginTop:20,borderBottomWidth:0.5,borderColor:‘#ccc‘}}> <Text style={{marginTop:13,marginLeft:15}}>手机号</Text> <Input style={{marginLeft:20}} placeholderTextColor={‘#ccc‘} placeholder="请输入手机号..."/> </View> <ListItem style={{backgroundColor:‘#fff‘,paddingLeft:0,marginLeft:0,marginTop:20,borderBottomWidth:0}}> <InputGroup> <Input style={{marginLeft:5,marginRight:10}} placeholderTextColor={‘#ccc‘} placeholder="请输入验证码..."/> { this.state.sendButton ? <Button style={{marginLeft:5,marginRight:10}} small success onPress={this.countTime.bind(this)}>发送验证码</Button> : <Button disabled style={{marginLeft:5,marginRight:10}} small>请等待{this.state.data}s</Button> } </InputGroup> </ListItem> <Button block success onPress={()=>this._navigate(‘找回密码‘,SetNewPasswordView)} style={{marginLeft:15,marginRight:15,marginTop:40,padding:15,height:45}}> 验证 </Button> </Content> </Container> ) } }
计时器60s
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。