html2canvas(document.getElementById('content'), {
onrendered:function(canvas) {
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一頁pdf顯示html頁面生成的canvas高度;
var pageHeight = contentWidth / 592.28 * 841.89;
//未生成pdf的html頁面高度
var leftHeight = contentHeight;
//頁面偏移
var position = 0;
//a4紙的尺寸[595.28,841.89]乡革,html頁面生成的canvas在pdf中圖片的寬高
var imgWidth = 595.28;
var imgHeight = 592.28/contentWidth * contentHeight;
var pageData = canvas.toDataURL('image/jpeg', 1.0);
var pdf = new jsPDF('', 'pt', 'a4');
//有兩個高度需要區(qū)分,一個是html頁面的實際高度,和生成pdf的頁面高度(841.89)
//當(dāng)內(nèi)容未超過pdf一頁顯示的范圍,無需分頁
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;
//避免添加空白頁
if(leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save(str+".pdf");
}
});
記得在導(dǎo)出之前 將要導(dǎo)出的部分的背景顏色填充袍嬉,要不然會導(dǎo)出黑塊