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最近新接了一个需求,想要在前端实现打印功能,最开始试了window.print()这个方法,结果发现我想打印的图片它只能打印图片中的一部分,打印的不完整,如下图
调整了缩放比例之后发现还是不可以,后来又尝试了vue里面的一个插件vue-print-nb,但是当所有的东西都配置好之后,点击打印的时候竟然报错,大概意思是说我的css样式获取不到
然后我试了最后一种方法,亲测好使print.js
1.首先src下新建文件夹(只是方便管理,你放在其他位置也可以)
2.附上print.js的代码
你也可以直接去这里下载源码
https://github.com/xyl66/vuePlugs_printjs
- // 打印类属性、方法定义
- /* eslint-disable */
- const Print = function (dom, options) {
- if (!(this instanceof Print)) return new Print(dom, options);
-
- this.options = this.extend({
- 'noPrint': '.no-print'
- }, options);
-
- if ((typeof dom) === "string") {
- this.dom = document.querySelector(dom);
- } else {
- this.isDOM(dom)
- this.dom = this.isDOM(dom) ? dom : dom.$el;
- }
-
- this.init();
- };
- Print.prototype = {
- init: function () {
- var content = this.getStyle() + this.getHtml();
- this.writeIframe(content);
- },
- extend: function (obj, obj2) {
- for (var k in obj2) {
- obj[k] = obj2[k];
- }
- return obj;
- },
-
- getStyle: function () {
- var str = "",
- styles = document.querySelectorAll('style,link');
- for (var i = 0; i < styles.length; i++) {
- str += styles[i].outerHTML;
- }
- str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
-
- return str;
- },
-
- getHtml: function () {
- var inputs = document.querySelectorAll('input');
- var textareas = document.querySelectorAll('textarea');
- var selects = document.querySelectorAll('select');
-
- for (var k = 0; k < inputs.length; k++) {
- if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
- if (inputs[k].checked == true) {
- inputs[k].setAttribute('checked', "checked")
- } else {
- inputs[k].removeAttribute('checked')
- }
- } else if (inputs[k].type == "text") {
- inputs[k].setAttribute('value', inputs[k].value)
- } else {
- inputs[k].setAttribute('value', inputs[k].value)
- }
- }
-
- for (var k2 = 0; k2 < textareas.length; k2++) {
- if (textareas[k2].type == 'textarea') {
- textareas[k2].innerHTML = textareas[k2].value
- }
- }
-
- for (var k3 = 0; k3 < selects.length; k3++) {
- if (selects[k3].type == 'select-one') {
- var child = selects[k3].children;
- for (var i in child) {
- if (child[i].tagName == 'OPTION') {
- if (child[i].selected == true) {
- child[i].setAttribute('selected', "selected")
- } else {
- child[i].removeAttribute('selected')
- }
- }
- }
- }
- }
-
- return this.dom.outerHTML;
- },
-
- writeIframe: function (content) {
- var w, doc, iframe = document.createElement('iframe'),
- f = document.body.appendChild(iframe);
- iframe.id = "myIframe";
- //iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
- iframe.setAttribute('style', 'position:absolute;width:0;height:0;top:-10px;left:-10px;');
- w = f.contentWindow || f.contentDocument;
- doc = f.contentDocument || f.contentWindow.document;
- doc.open();
- doc.write(content);
- doc.close();
- var _this = this
- iframe.onload = function(){
- _this.toPrint(w);
- setTimeout(function () {
- document.body.removeChild(iframe)
- }, 100)
- }
- },
-
- toPrint: function (frameWindow) {
- try {
- setTimeout(function () {
- frameWindow.focus();
- try {
- if (!frameWindow.document.execCommand('print', false, null)) {
- frameWindow.print();
- }
- } catch (e) {
- frameWindow.print();
- }
- frameWindow.close();
- }, 10);
- } catch (err) {
- console.log('err', err);
- }
- },
- isDOM: (typeof HTMLElement === 'object') ?
- function (obj) {
- return obj instanceof HTMLElement;
- } :
- function (obj) {
- return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
- }
- };
- const MyPlugin = {}
- MyPlugin.install = function (Vue, options) {
- // 4. 添加实例方法
- Vue.prototype.$print = Print
- }
- export default MyPlugin
3.在main.js里面引入
4.最后就可以在自己的页面使用了
- <section ref="print" class="recordImg" id="printRecord">
- <img :src="image" alt="">
- </section>
- <span slot="footer" class="dialog-footer">
- <el-button @click="recordVisible = false">取 消</el-button>
- <el-button type="primary" @click="PrintRow">打 印</el-button>
- </span>
- //打印
- PrintRow(index, row){
- this.$print(this.$refs.print) // 使用
- },
好啦,到这里就可以啦,如果有小伙伴有更好的办法或者问题欢迎在下面留言讨论
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