vue-pdf在vue框架中的使用

在components目录下新建PdfViewer/index.vue

vue-pdf版本为4.3.0

javascript 复制代码

<template>
    <div :id="containerId" v-if="hasProps" class="container">
        <div class="right-btn">
            <div class="pageNum">
                <input v-model.number="currentPage" type="number" class="inputNumber" @input="inputEvent()"> / {{pageCount}}
            </div>
            <div @click="changePdfPage('first')" class="turn">首页</div>
            <div @click="changePdfPage('pre')" class="turn-btn" :style="currentPage===1?'cursor: not-allowed;':''">上一页</div>
            <div @click="changePdfPage('next')" class="turn-btn" :style="currentPage===pageCount?'cursor: not-allowed;':''">下一页</div>
            <div @click="changePdfPage('last')" class="turn">尾页</div>
            <div @click="scaleUp()" class="turn-btn">放大</div>
            <div @click="scaleDown()" class="turn-btn">缩小</div>
            <div @click="rotate()" class="turn-btn">旋转</div>
            <div @click="downPDF()" class="turn" v-if="isShowDownloadBtn">下载</div>
        </div>

        <div class="pdfArea">
            <pdf :src="src" :ref="pdfRef" :page="currentPage" @num-pages="pageCount=$event" @progress="loadedRatio = $event" @page-loaded="currentPage=$event" @loaded="loadPdfHandler" @link-clicked="currentPage = $event" style="display: inline-block;width:100%" />
        </div>
    </div>
</template>

<script>
import pdf from 'vue-pdf'

export default {
    name: "pdfViewer",
    props: {
        // src pdf资源路径
        src: {
            type: String,
            default: () => {
                return null;
            },
        },
        // 该pdf-viewer组件唯一id
        containerId: {
            type: String,
            default: () => {
                return null;
            },
        },
        // 该pdf-viewer组件唯一ref
        pdfRef: {
            type: String,
            default: () => {
                return null;
            },
        },
        // 是否展示下载按钮
        isShowDownloadBtn: {
            type: Boolean,
            default: () => {
                return false;
            }
        },
    },
    components: {
        pdf
    },
    computed: {
        hasProps() {
            return this.src && this.containerId && this.pdfRef;
        }
    },
    created() { },
    mounted() {
        this.$nextTick(() => {
            this.prohibit();
        })
    },
    data() {
        return {
            scale: 100,  //  开始的时候默认和容器一样大即宽高都是100%
            rotation: 0, // 旋转角度
            currentPage: 0, // 当前页数
            pageCount: 0, // 总页数
        }
    },
    methods: {
        rotate() {
            this.rotation += 90;
            this.$refs[this.pdfRef].$el.style.transform = `rotate(${this.rotation}deg)`;
            console.log(`当前旋转角度: ${this.rotation}°`);
        },
        // 页面回到顶部
        toTop() {
            document.getElementById(this.containerId).scrollTop = 0
        },
        // 输入页码时校验
        inputEvent() {
            if (this.currentPage > this.pageCount) {
                // 1. 大于max
                this.currentPage = this.pageCount
            } else if (this.currentPage < 1) {
                // 2. 小于min
                this.currentPage = 1
            }
        },
        // 切换页数
        changePdfPage(val) {
            if (val === 'pre' && this.currentPage > 1) {
                // 切换后页面回到顶部
                this.currentPage--
                this.toTop()
            } else if (val === 'next' && this.currentPage < this.pageCount) {
                this.currentPage++
                this.toTop()
            } else if (val === 'first') {
                this.currentPage = 1
                this.toTop()
            } else if (val === 'last' && this.currentPage < this.pageCount) {
                this.currentPage = this.pageCount
                this.toTop()
            }
            this.$refs[this.pdfRef].$el.style.transform = `rotate(0deg)`;
            this.rotation = 0;
        },

        // pdf加载时
        loadPdfHandler(e) {
            // 加载的时候先加载第一页
            // console.log(e);
            this.currentPage = 1
        },

        // 禁用鼠标右击、F12 来禁止打印和打开调试工具
        prohibit() {
            let node = document.querySelector(`#${this.containerId}`);
            node.oncontextmenu = function () {
                return false
            }
            node.onkeydown = function (e) {
                console.log("禁用", e);
                if (e.ctrlKey && (e.keyCode === 65 || e.keyCode === 67 || e.keyCode === 73 || e.keyCode === 74 || e.keyCode === 80 || e.keyCode === 83 || e.keyCode === 85 || e.keyCode === 86 || e.keyCode === 117)) {
                    return false
                }
                if (e.keyCode === 18 || e.keyCode === 123) {
                    return false
                }
            }
        },
        //放大
        scaleUp() {
            if (this.scale == 300) {
                return;
            }

            this.scale += 5;
            this.$refs[this.pdfRef].$el.style.width = parseInt(this.scale) + "%";
            this.$refs[this.pdfRef].$el.style.height = parseInt(this.scale) + "%";
            console.log(`当前缩放倍数: ${this.scale}%`);
        },
        //缩小
        scaleDown() {
            if (this.scale == 30) {
                return;
            }
            this.scale += -5;
            this.$refs[this.pdfRef].$el.style.width = parseInt(this.scale) + "%";
            this.$refs[this.pdfRef].$el.style.height = parseInt(this.scale) + "%";
            console.log(`当前缩放倍数: ${this.scale}%`);
        },
        // 下载
        downPDF() { // 下载 pdf
            var url = this.src
            var tempLink = document.createElement("a");
            tempLink.style.display = "none";
            tempLink.href = url;
            tempLink.setAttribute("download", 'XXX.pdf');
            if (typeof tempLink.download === "undefined") {
                tempLink.setAttribute("target", "_blank");
            }
            document.body.appendChild(tempLink);
            tempLink.click();
            document.body.removeChild(tempLink);
        },
    }
}
</script>

<style lang="scss" scoped>
#container {
    overflow: auto;
    height: 800px;
    font-family: PingFang SC;
    width: 100%;
    display: flex;
    /* justify-content: center; */
    position: relative;
}

.container {
    position: relative;
}

/* 右侧功能按钮区 */
.right-btn {
    // position: fixed;
    position: absolute;
    right: 10%;
    // bottom: 15%;
    top: 5%;
    width: 120px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    z-index: 99;
    user-select: none;
}

.pdfArea {
    width: 80%;
}

/* ------------------- 输入页码 ------------------- */
.pageNum {
    margin: 10px 0;
    font-size: 18px;
}
/*在谷歌下移除input[number]的上下箭头*/
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none !important;
    margin: 0;
}

.inputNumber {
    border-radius: 8px;
    border: 1px solid #999999;
    height: 35px;
    font-size: 18px;
    width: 60px;
    text-align: center;
}
.inputNumber:focus {
    border: 1px solid #00aeff;
    background-color: rgba(18, 163, 230, 0.096);
    outline: none;
    transition: 0.2s;
}

/* ------------------- 切换页码 ------------------- */
.turn {
    background-color: #888888;
    opacity: 0.7;
    color: #ffffff;
    height: 70px;
    width: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 5px 0;
}

.turn-btn {
    background-color: #000000;
    opacity: 0.6;
    color: #ffffff;
    height: 70px;
    width: 70px;
    border-radius: 50%;
    margin: 5px 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.turn-btn:hover,
.turn:hover {
    transition: 0.3s;
    opacity: 0.5;
    cursor: pointer;
}

/* ------------------- 进度条 ------------------- */
.progress {
    position: absolute;
    right: 50%;
    top: 50%;
    text-align: center;
}
.progress > span {
    color: #199edb;
    font-size: 14px;
}
</style>

main.js中引用，全局注册

javascript 复制代码

import PdfViewer from "@/components/PdfViewer"
Vue.component('PdfViewer', PdfViewer)

在项目中使用

html 复制代码

<el-dialog>
    <PdfViewer :src="pdf地址" containerId="id，自定义" pdfRef="ref，自定义" :isShowDownloadBtn="布尔值，是否开启下载功能"></PdfViewer>
</el-dialog>

vue-pdf在vue框架中的使用

在components目录下新建PdfViewer/index.vue

main.js中引用，全局注册

在项目中使用

使用效果