react native toast (ios&android)

QQ20181217-160818-HD.gif

今天我带来了Quark浏览器的toast

设置:

• position => 位置
  ToastPosition.top
ToastPosition.center
ToastPosition.bottom默认⚠️
• duration => 时间
  DURATION.LENGTH_SHORT2秒
  DURATION.LENGTH_NORMAL3秒 默认⚠️
  DURATION.LENGTH_LOG4秒

使用方式

DeviceEventEmitter.emit('toast', 'show toast')

center.gif

top.gif

你把这NurToast.js直接调用indexjs或者是mainjs 就OK了比如：

export default class index extends Component {
    render() {
        return (
            ...
  
                {/**就一行*/}
                
            ...
    }
}

然后想显示toast的时候通过DeviceEventEmitter.emit('toast', msj)这方法把信息发送到NurToast.js就好了

NurToast.js:

import React, {Component} from 'react'
import {DeviceEventEmitter, Dimensions, LayoutAnimation, Platform, Text, UIManager, View} from "react-native";

const window = Dimensions.get('window');

export const ToastPosition = {bottom: 8, center: 2.2, top: 1.2};
export const DURATION = {
    LENGTH_SHORT: 2000,
    LENGTH_NORMAL: 3000,
    LENGTH_LOG: 4000,
};
export default class NurToast extends Component {


    propTypes: {
        ...ViewPropTypes,
        position: PropTypes.number,
        duration: PropTypes.number,
    };

    // 构造
    constructor(props) {
        super(props);

        this.toastCloseNum = 0;
        this.toastCloseNumOld = 0;
        // 初始状态
        this.state = {
            toastR: window.width,
            toastMessage: ''
        };
    }


    componentDidMount() {
        this.toastListner = DeviceEventEmitter.addListener('toast', (text) => {
            this.showToast(text);
        })
    }

    componentWillUnmount() {
        this.toastListner && this.toastListner.remove();
        this.timer && clearTimeout(this.timer)
    }


    /**
     * show toast
     * @param msj
     */
    showToast(msj) {
        let state = this.state;
        if (!state.toastR && state.toastMessage !== msj) {
            this.toastCloseNum += 1;
            this.anim();
            this.setState({
                toastR: window.width,
            });

            this.timer = setTimeout(() => {
                this.anim();
                this.setState({
                    toastR: null,
                    toastMessage: msj,
                });
            }, 300);
            this.closeToast();
        } else if (state.toastR) {
            this.toastCloseNum += 1;

            this.anim();
            this.setState({
                toastR: null,
                toastMessage: msj,
            });
            this.closeToast();
        }
    }

    /**
     * toast close
     */
    closeToast() {
        this.timer = setTimeout(() => {
            this.toastCloseNumOld += 1;
            if (this.toastCloseNumOld === this.toastCloseNum) {
                this.toastCloseNumOld = 0;
                this.toastCloseNum = 0;
                this.anim();
                this.setState({
                    toastR: window.width,
                });
            }
        }, this.props.duration || DURATION.LENGTH_NORMAL);
    }

    /**
     * set动画效果
     */
    anim() {
        if (Platform.OS === 'android') {
            UIManager.setLayoutAnimationEnabledExperimental(true);
        }
        LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
    }


    render() {
        return 

            {this.state.toastMessage}

        
    }
}