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+<template>
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+ <div class="common-pdfView-modal">
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+ <div>
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+ <div id="canvas"></div>
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+ <div class="tools">
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+ <div>
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+ 调整比例:{{ Math.round(scalVal*100) }}%
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+ <div>
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+ <u-button :disabled="scalLoading" style="margin-right: 10px;" size="mini" @click="setScalVal(0)"><a-icon type="minus" /> 缩小</u-button>
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+ <u-button :disabled="scalLoading" size="mini" @click="setScalVal(1)"><a-icon type="plus" /> 放大</u-button>
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+ </div>
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+ </div>
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+ <div>
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+ <div v-if="hasClipboard">
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+ <u-button :disabled="scalLoading" size="mini" @click="handleCapture('export')"><a-icon type="export" /> 导出图片</u-button>
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+ </div>
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+ </div>
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+ <div>
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+ </div>
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+ </div>
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+ <div :style="{width: '100%',height: '70vh',margin:'0 auto',padding: '10px 0',overflow:'auto'}">
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+ <div v-if="loadedRatio > 0 && loadedRatio < 1" style="background-color: green; color: white; text-align: center" :style="{ width: loadedRatio * 100 + '%' }">{{ Math.floor(loadedRatio * 100) }}%</div>
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+ <pdf
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+ ref="pdf"
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+ v-for="(item,index) in pdfList"
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+ :key="'pdf-'+index"
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+ :style="{width: Math.round(scalVal*100)+'%',margin:'0 auto'}"
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+ :src="getUrl('data:application/pdf;base64,' + item)"
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+ :page="page"
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+ :rotate="rotate"
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+ @error="error"
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+ ></pdf>
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+ </div>
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+ </div>
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+ <div class="btn-box">
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+ <u-button size="large" style="margin-right: 25px;" @click="handleCommonCancel">取消</u-button>
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+ <u-button size="large" style="margin-right: 25px;" type="default" @click="handleCapture(hasClipboard?'copy':'export')">
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+ {{ hasClipboard?'复制截图':'导出图片' }}
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+ </u-button>
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+ </div>
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+ </div>
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+</template>
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+
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+<script>
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+import moment from 'moment'
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+import pdf from 'vue-pdf-signature'
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+import CMapReaderFactory from 'vue-pdf-signature/src/CMapReaderFactory.js'
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+export default {
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+ components: {
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+ pdf
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+ },
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+ name: 'PdfView',
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+ data () {
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+ return {
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+ scalLoading: false,
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+ pdfAllLoad: 0,
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+ scalVal: 0.75,
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+ show: true,
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+ pdfList: [],
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+ src: '',
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+ loadedRatio: 0,
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+ page: 1,
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+ numPages: 0,
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+ rotate: 0,
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+ curpage: 1,
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+ total: 3,
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+ }
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+ },
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+ computed: {
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+ hasClipboard () {
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+ return typeof ClipboardItem !== 'undefined'
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+ }
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+ },
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+ onload(opts){
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+ this.setData()
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+ },
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+ methods: {
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+ // 缩放
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+ setScalVal (t) {
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+ if (!this.scalLoading) {
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+ this.scalLoading = true
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+ this.scalVal = this.scalVal + (t ? 0.05 : -0.05)
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+ if (this.scalVal > 1) {
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+ this.scalVal = 1
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+ }
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+ if (this.scalVal < 0.5) {
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+ this.scalVal = 0.5
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+ }
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+ setTimeout(() => {
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+ this.scalLoading = false
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+ }, 1000)
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+ }
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+ },
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+ getUrl (item) {
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+ const src = pdf.createLoadingTask({ url: item, CMapReaderFactory })
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+ return src
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+ },
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+ setData () {
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+ this.pdfList = this.$store.state.vuex_tempData
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+ this.curpage = 1
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+ this.total = data.length
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+ },
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+ error: function (err) {
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+ console.log(err)
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+ },
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+ // 取消
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+ handleCommonCancel () {
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+ this.pdfList = []
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+ uni.navigateBack()
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+ },
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+ // 截图
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+ handleCapture (type) {
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+ if (this.scalLoading) { return }
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+ const pdf = this.$refs.pdf
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+ const len = pdf.length
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+ const imgsList = []
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+ const canvas = document.createElement('canvas')
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+ let maxHeight = 0
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+ const maxWidth = pdf[0].$refs.canvas.width
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+ for (let i = 0; i < len; i++) {
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+ const imgs = pdf[i].$refs.canvas
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+ maxHeight = maxHeight + imgs.height
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+ imgsList.push(imgs)
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+ }
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+ // 设置画布宽度和高度
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+ canvas.width = maxWidth
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+ canvas.height = maxHeight
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+ const ctx = canvas.getContext('2d')
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+ // 开始合并
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+ let y = 0
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+ imgsList.map(item => {
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+ ctx.drawImage(item, 0, y, item.width, item.height)
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+ y = y + item.height
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+ })
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+ const base64Str = canvas.toDataURL('image/png')
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+ // 复制图片
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+ if (type == 'copy') {
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+ this.copyImgBtn(base64Str)
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+ }
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+ // 下载图片
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+ if (type == 'export') {
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+ const fileName = moment().format('YYYYMMDDHHmmss')
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+ this.downloadFile(fileName, base64Str)
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+ }
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+ // 清除画布
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+ ctx.clearRect(0, 0, maxWidth, maxHeight)
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+ },
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+ downloadFile (fileName, base64Data) {
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+ const aLink = document.createElement('a')
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+ const blob = this.convertBase64ToBlob(base64Data.split(',')[1], 'image/png')
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+ const evt = document.createEvent('HTMLEvents')
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+ // initEvent 不加后两个参数在FF下会报错 事件类型,是否冒泡,是否阻止浏览器的默认行为
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+ evt.initEvent('click', true, true)
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+ aLink.download = fileName
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+ aLink.href = URL.createObjectURL(blob)
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+ aLink.click()
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+ },
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+ // 将照片复制到剪贴版
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+ copyImgBtn (base64Data) {
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+ const blobInput = this.convertBase64ToBlob(base64Data.split(',')[1], 'image/png')
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+ if (navigator.clipboard) {
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+ const clipboardItemInput = new ClipboardItem({ 'image/png': blobInput })
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+ navigator.clipboard.write([clipboardItemInput])
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+ this.$message.success('截图成功,可以右键去粘贴图片!')
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+ } else {
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+ const image = nativeImageElectron.createFromDataURL(base64Data)
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+ clipboardElectron.writeImage(image)
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+ this.$message.success('截图成功,可以右键去粘贴图片!')
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+ }
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+ },
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+ convertBase64ToBlob (base64, type) {
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+ var bytes = window.atob(base64)
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+ var ab = new ArrayBuffer(bytes.length)
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+ var ua = new Uint8Array(ab)
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+ for (var i = 0; i < bytes.length; i++) {
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+ ua[i] = bytes.charCodeAt(i)
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+ }
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+ return new Blob([ab], { type: type })
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+ }
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+ },
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+ watch: {
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+ }
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+}
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+</script>
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+
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+<style lang="less">
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+ .common-pdfView-modal{
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+ background-color: #666;
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+ .tools{
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+ padding: 10px;
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+ display: flex;
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+ align-items: center;
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+ border-bottom: 1px solid #eee;
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+ background-color: #f8f8f8;
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+ justify-content: space-between;
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+ > div{
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+ display: flex;
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+ align-items: center;
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+ >div{
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+ padding: 0 10px;
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+ }
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+ }
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+ }
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+ .btn-box{
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+ text-align: center;
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+ margin-top: 20px;
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+ }
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+ }
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+</style>
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