vue ：用html2canvas 转pdf

dom:

导出
导出图片

    

js:

test1() {//到出图片
    html2canvas(this.$refs.exportContent, {
        //dpi: 172,//导出pdf清晰度
    }).then((canvas) => {
        this.imgData = canvas.toDataURL("image/png");
    })
},
test() {//到出
    html2canvas(this.$refs.exportContent, {
        dpi: 300,//导出pdf清晰度
    }).then((canvas) => {
        var contentWidth = canvas.width;
        var contentHeight = canvas.height;

        //一页pdf显示html页面生成的canvas高度;
        var pageHeight = contentWidth / 592.28 * 841.89;
        //未生成pdf的html页面高度
        var leftHeight = contentHeight;
        //pdf页面偏移
        var position = 0;
        //html页面生成的canvas在pdf中图片的宽高（a4纸的尺寸[595.28,841.89]）
        var imgWidth = 595.28;
        var imgHeight = 592.28 / contentWidth * contentHeight;

        var pageData = canvas.toDataURL('image/jpeg', 1.0);
        var pdf = new jsPDF('', 'pt', 'a4');

        //有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
        //当内容未超过pdf一页显示的范围，无需分页
        if (leftHeight < pageHeight) {
            pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight);
        } else {
            while (leftHeight > 0) {
                pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
                leftHeight -= pageHeight;
                position -= 841.89;
                //避免添加空白页
                if (leftHeight > 0) {
                    pdf.addPage();
                }
            }
        }
        //pdf.vue.save('content.pdf.vue');
        let file = pdf.output("blob");
        let files = new window.File([file], this.pdfData.studentInfoUid, {type: file.type})
        //console.log(files)
        this.$http.ybx_admin_studentInfo_uploadFile_post({
            data: {
                studentInfoUid: this.pdfData.studentInfoUid?this.pdfData.studentInfoUid:this.$route.query.uid,
                file: files
            },
            isUpload: true,
            fileKey: 'file',
            load: {fullLoading: true}
        }).then(()=> {
            this.$emit('on-change');
        })
    })
},

注:

动态绑定数据，如果是中文，会产生叠加，解决方法：利用css的文字之间间距调整

letter-spacing: .7mm;