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react-image-viewers

v1.0.8

Published

a native js imageViewerUtil and react image viewer

Downloads

40

Readme

react-image-viewers

一款 React 图片组件,基于 ImageViewerUtil 实现,包含:图片预览、放大、缩小、旋转、拖动功能

使用方式

yarn add react-image-viewers
import ReactImageViewer from 'react-image-viewers'
import 'react-image-viewers/lib/esm/index.css'


const reactImageViewerRef = useRef(null)
const [loading, setLoading] = useState(false)

<ReactImageViewer
    ref={reactImageViewerRef}
    url={imageUrl}
    timeout={5000}
    onLoadStart={(url) => {
        console.log(`ReactImageViewer Image LoadStart:: url=${url}`)
        setLoading(true)
    }}
    onLoad={(image) => {
        const { width, height } = image
        console.log(`ReactImageViewer Image Load:: width=${width},height=${height}`)
        setLoading(false)
    }}
    onLoadError={(err) => {
        console.error(`ReactImageViewer Image LoadError:: error=${JSON.stringify(err)}`)
        setLoading(false)
    }}
    onStyleChange={(opts) => {
        console.log(`ReactImageViewer Image StyleChange:: options=${JSON.stringify(opts)}`)
    }}
/>

API

1、属性

  • [url]: image url
  • [onLoadStart]:image loading
  • [onLoad]: image load
  • [onLoadError]: image load error
  • [onStyleChange]:image some attr change
  • [timeout]:delay show image
  • [config]: perScale?: number // 每次缩放比例 minScale?: number // 最小缩放比例 maxScale?: number // 最大缩放比例 perRotate?: number // 每次旋转角度 minRotate?: number // 最小旋转角度 maxRotate?: number // 最大旋转角度 translateTouchType?: 'mousewheel' | 'shift' | 'alt' | 'shift+mousewheel' | 'ctrl+shift+mousewheel' | 'ctrl+alt+mousewheel' // 滚轮缩放触发类型

2、ref

<button
    onClick={() => {
        reactImageViewerRef.current.setLarge()
    }}
>
    放大
</button>
<button
    onClick={() => {
        reactImageViewerRef.current.setSmall()
    }}
>
    缩小
</button>
<button
    onClick={() => {
        reactImageViewerRef.current.setReset()
    }}
>
    还原
</button>
<button
    onClick={() => {
        reactImageViewerRef.current.setRotate()
    }}
>
    旋转
</button>

ImageViewerUtil

此类使用原生 js 实现,不依赖任何第三方库

包含:图片预览、放大、缩小、旋转、拖动功能

使用方式

1、html 中使用

# 引入dist/ImageViewerUtil.js,详见:examples/purehtml/index.html
<script src="ImageViewerUtil.js"></script>

2、import 方式

import { ImageViewerUtil } from 'react-image-viewers'

API

1、初始化

const imageContainer = '<img /> 外层dom元素'
const image = '<img /> dom元素'
const config = {
    imageContainerNode: imageContainer,
    imageNode: image,
    onLoadStart: () => {
        // 图片加载中,loading
    },
    onLoad: () => {
        // 图片加载完成,loading 取消
    },
    onLoadError: () => {
        // 图片加载出错
    },
    onStyleChange: () => {
        // 图片放大、缩小、旋转、拖动回调
    },
}
const imageViewerUtil = new ImageViewerUti(config)

2、加载图片

切换上一张、下一张图片均自己控制

const imageUrl = '图片地址'
imageViewerUtil.update({ url: imageUrl })

3、图片放大

imageViewerUtil.setLarge()

4、图片缩小

imageViewerUtil.setSmall()

5、图片还原

imageViewerUtil.setReset()

6、图片旋转

imageViewerUtil.setRotate()

7、销毁实例

imageViewerUtil.destory()

7、debug 模式

imageViewerUtil.setDebug(true)

7、图片延迟加载

const timeout = 3000 // 3s后显示图片
imageViewerUtil.setTimeout(timeout)

8、更新 config

imageViewerUtil.setConfig({
    # perScale: 3, // 每次缩放比例
    # minScale: 2, // 最小缩放比例
    # maxScale: 7, // 最大缩放比例
    # perRotate: 10, // 每次旋转角度
    # minRotate: 0, // 最小旋转角度
    # maxRotate: 180, // 最大旋转角度
    # translateTouchType: 'shift+mousewheel', // 'mousewheel' | 'shift+mousewheel' | 'alt+mousewheel' | 'ctrl+shift+mousewheel' | 'ctrl+alt+mousewheel' // 滚轮缩放触发类型,默认mousewheel
})