前言
项目生成公司水印是很普遍的需求，下面是vue项目生产水印的方法。话不多说，复制粘贴就可以马上解决你的需求
①. vue页面打印水印[一]
- ①. 创建watermark.js文件
/** 水印添加方法 */ let setWatermark = (str1, str2) => { let id = '1.23452384164.123412415' if (document.getElementById(id) !== null) { document.body.removeChild(document.getElementById(id)) } let can = document.createElement('canvas') // 设置canvas画布大小 can.width = 150 can.height = 80 let cans = can.getContext('2d') cans.rotate(-20 * Math.PI / 180) // 水印旋转角度 cans.font = '15px Vedana' cans.fillStyle = '#666666' cans.textAlign = 'center' cans.textBaseline = 'Middle' cans.fillText(str1, can.width / 2, can.height) // 水印在画布的位置x，y轴 cans.fillText(str2, can.width / 2, can.height + 22) let div = document.createElement('div') div.id = id div.style.pointerEvents = 'none' div.style.top = '40px' div.style.left = '0px' div.style.opacity = '0.15' div.style.position = 'fixed' div.style.zIndex = '100000' div.style.width = document.documentElement.clientWidth + 'px' div.style.height = document.documentElement.clientHeight + 'px' div.style.background = 'url(' + can.toDataURL('image/png') + ') left top repeat' document.body.appendChild(div) return id } // 添加水印方法 export const setWaterMark = (str1, str2) => { let id = setWatermark(str1, str2) if (document.getElementById(id) === null) { id = setWatermark(str1, str2) } } // 移除水印方法 export const removeWatermark = () => { let id = '1.23452384164.123412415' if (document.getElementById(id) !== null) { document.body.removeChild(document.getElementById(id)) } }
②. 在vue页面进行引入
import { removeWatermark, setWaterMark } from '@/common/watermark' mounted() { setWaterMark('liergou', '李二狗'); }, destroyed() { removeWatermark(); },
②. vue页面打印水印[二]
前言
这种方式是自己在项目中用到的,在destroy方法中将打印在页面上的div移除掉
①. 代码如下
//打印水印 watermark(settings) { //默认设置 var defaultSettings = { watermark_txt: settings, watermark_x:220,//水印起始位置x轴坐标 watermark_y:100,//水印起始位置Y轴坐标 watermark_rows:20,//水印行数 watermark_cols:20,//水印列数 watermark_x_space:140,//水印x轴间隔 watermark_y_space:80,//水印y轴间隔 watermark_color:'#CCEED0',//水印字体颜色 watermark_alpha:0.9,//水印透明度 watermark_fontsize:'10px',//水印字体大小 watermark_font:'微软雅黑',//水印字体 watermark_width:120,//水印宽度 watermark_height:80,//水印长度 //watermark_angle:15//水印倾斜度数 }; var oTemp = document.createDocumentFragment(); //获取页面最大宽度 var page_width = Math.max(document.body.scrollWidth, document.body.clientWidth); //获取页面最大长度 var page_height = Math.max(document.body.scrollHeight, document.body.clientHeight); //如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔 if (defaultSettings.watermark_cols == 0 || (parseInt(defaultSettings.watermark_x + defaultSettings.watermark_width * defaultSettings.watermark_cols + defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1)) > page_width)) { defaultSettings.watermark_cols = parseInt((page_width - defaultSettings.watermark_x + defaultSettings.watermark_x_space) / (defaultSettings.watermark_width + defaultSettings.watermark_x_space)); defaultSettings.watermark_x_space = parseInt((page_width - defaultSettings.watermark_x - defaultSettings.watermark_width * defaultSettings.watermark_cols) / (defaultSettings.watermark_cols - 1)); } //如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔 if (defaultSettings.watermark_rows == 0 || (parseInt(defaultSettings.watermark_y + defaultSettings.watermark_height * defaultSettings.watermark_rows + defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1)) > page_height)) { defaultSettings.watermark_rows = parseInt((defaultSettings.watermark_y_space + page_height - defaultSettings.watermark_y) / (defaultSettings.watermark_height + defaultSettings.watermark_y_space)); defaultSettings.watermark_y_space = parseInt((page_height - defaultSettings.watermark_y - defaultSettings.watermark_height * defaultSettings.watermark_rows) / (defaultSettings.watermark_rows - 1)); } var x; var y; for (var i = 0; i < defaultSettings.watermark_rows; i++) { y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i; for (var j = 0; j < defaultSettings.watermark_cols; j++) { x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j; var mask_div = document.createElement('div'); mask_div.id = 'mask_div' + i + j; //alert(mask_div.id) mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt)); //设置水印div倾斜显示 mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)"; mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)"; mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)"; mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)"; mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)"; mask_div.style.visibility = ""; mask_div.style.position = "absolute"; mask_div.style.left = x + 'px'; mask_div.style.top = y + 'px'; mask_div.style.overflow = "hidden"; mask_div.style.zIndex = "9999"; //mask_div.style.border="solid #eee 1px"; mask_div.style.opacity = defaultSettings.watermark_alpha; mask_div.style.fontSize = defaultSettings.watermark_fontsize; mask_div.style.fontFamily = defaultSettings.watermark_font; mask_div.style.color = defaultSettings.watermark_color; mask_div.style.textAlign = "center"; mask_div.style.width = defaultSettings.watermark_width + 'px'; mask_div.style.height = defaultSettings.watermark_height + 'px'; mask_div.style.display = "block"; oTemp.appendChild(mask_div); }; }; document.body.appendChild(oTemp); }
//这个方法用来在页面进行跳转的时候将水印的div消除 destroyed() { //注意这个40是水印的div的行数,可以根据测试自己定义 for (var i = 0; i < 40; i++) { for (var j = 0; j < 40; j++) { var id="mask_div" + i + j; if(document.getElementById(id)!=null){ //某个标签 var tag = document.getElementById(id); //删除 tag.parentNode.removeChild(tag); } } } }
②. 效果如图：
