canvas.style.height = shareContent.clientHeight * scale + "px";
canvas.getContext("2d").scale(scale, scale); //获取context,设置scale
let opts = {
scale: scale, // 添加的scale 参数
canvas: canvas, //自定义 canvas
logging: false, //日志开关，便于查看html2canvas的内部执行流程
width: width, //dom 原始宽度
height: height,
useCORS: true, // 【重要】开启跨域配置
};
html2Canvas(shareContent, opts).then(() => {
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;
//页面偏移
var position = 0;
//a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
var imgWidth = 595.28;
var imgHeight = (592.28 / contentWidth) * contentHeight;
var pageData = canvas.toDataURL("image/jpeg", 1.0);
var PDF = new JsPDF("", "pt", "a4");
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;
if (leftHeight > 0) {
PDF.addPage();
}
}
}
PDF.save(name + ".pdf"); // 这里是导出的文件名
});
},
