我正在从jsPDF api生成pdf，我想在页面编号的每个页面上添加页脚。
如何实现这一目标。它可以选择从HTML插件添加页脚，但我写的是没有HTML。
var doc = new jsPDF("portrait","px","a4");
答案 0 :(得分：5)
你必须自己实施。你可以这样做：
var doc = new jsPDF();
doc.page=1; // use this as a counter.
function footer(){
doc.text(150,285, 'page ' + doc.page); //print number bottom right
doc.page ++;
};
// and call footer() after each doc.addPage()
答案 1 :(得分：3)
如果您需要类似＆＃34;当前页面/总页数＆＃34;显示每个页面。 使用＆＃34;总页数＆＃34;插件在jspdf v1.0 +
中可用使用方法：
var doc = new jsPDF();
doc.page=1; // use this as a counter.
var totalPagesExp = "{total_pages_count_string}";
function footer(){
var str = "Page " + doc.page;
if (typeof doc.putTotalPages === 'function') {
str = str + "/" + totalPagesExp;
}
doc.text(150,285, str); //print number bottom right
}
// call footer() after each doc.addPage()
// and before doc.save() do not forget put
if (typeof doc.putTotalPages === 'function') {
doc.putTotalPages(totalPagesExp);
}
它应该工作。希望这会有所帮助。
答案 2 :(得分：3)
这对我有用：
我刚在A4纸上放了配药；
只需在 doc.save（）之前添加for即可；
//创建文档
var doc = new jsPDF('p','mm','a4');
// Some stuff
doc.text("Some text", 74, 150);
doc.addPage();
doc.text("Some text", 74, 150);
doc.addPage();
doc.text("Some text", 74, 150);
doc.addPage();
doc.text("Some text", 74, 150);
doc.addPage();
doc.text("Last page", 74, 150);
// PAGE NUMBERING
// Add Page number at bottom-right
// Get the number of pages
const pageCount = doc.internal.getNumberOfPages();
// For each page, print the page number and the total pages
for(var i = 1; i <= pageCount; i++) {
// Go to page i
doc.setPage(i);
//Print Page 1 of 4 for example
doc.text('Page ' + String(i) + ' of ' + String(pageCount),210-20,297-30,null,null,"right");
}
// Save the doc
doc.save('test.pdf');
答案 3 :(得分：2)
我知道这篇文章已经过时了，但我会提供另一种解决方案。 首先定义您的总页数。有多种方法可以确定这一点，所以我不会进入那个。
var doc = new jsPDF('p', 'pt', 'letter');
doc.page = 1; // use this as a counter.
var totalPages = 10; // define total amount of pages
// HEADER
doc.setFontSize(20);//optional
doc.setTextColor(40);//optional
doc.setFontStyle('normal');//optional
doc.text("Report", 50, 22);// set your margins
// FOOTER
var str = "Page " + doc.page + " of " + totalPages;
doc.setFontSize(10);// optional
doc.text(str, 50, doc.internal.pageSize.height - 10);//key is the interal pageSize function
// Add Page content
.....
//Add new page and increase page count
doc.addPage();
doc.page ++;
//Begin process all over again.
这在循环中很有效，因为您可以通过将array.length + 1设置为页数（因为它基于零）。
答案 4 :(得分：1)
在深入研究代码之后，我认为您提出的功能尚未实现。但是有一个从html生成页脚的功能，您可以使用此代码来满足您的需求。但要注意代码的某些部分标记为“ bad hack ”。
checkForFooter = function (elem, renderer, elementHandlers) {
//check if we can found a <footer> element
var footer = elem.getElementsByTagName("footer");
if (footer.length > 0) {
footer = footer[0];
//bad hack to get height of footer
//creat dummy out and check new y after fake rendering
var oldOut = renderer.pdf.internal.write;
var oldY = renderer.y;
renderer.pdf.internal.write = function () {};
DrillForContent(footer, renderer, elementHandlers);
var footerHeight = Math.ceil(renderer.y - oldY) + 5;
renderer.y = oldY;
renderer.pdf.internal.write = oldOut;
//add 20% to prevent overlapping
renderer.pdf.margins_doc.bottom += footerHeight;
//Create function render header on every page
var renderFooter = function (pageInfo) {
var pageNumber = pageInfo !== undefined ? pageInfo.pageNumber : 1;
//set current y position to old margin
var oldPosition = renderer.y;
//render all child nodes of the header element
renderer.y = renderer.pdf.internal.pageSize.height - renderer.pdf.margins_doc.bottom;
renderer.pdf.margins_doc.bottom -= footerHeight;
//check if we have to add page numbers
var spans = footer.getElementsByTagName('span');
for (var i = 0; i < spans.length; ++i) {
//if we find some span element with class pageCounter, set the page
if ((" " + spans[i].className + " ").replace(/[\n\t]/g, " ").indexOf(" pageCounter ") > -1) {
spans[i].innerHTML = pageNumber;
}
//if we find some span element with class totalPages, set a variable which is replaced after rendering of all pages
if ((" " + spans[i].className + " ").replace(/[\n\t]/g, " ").indexOf(" totalPages ") > -1) {
spans[i].innerHTML = '###jsPDFVarTotalPages###';
}
}
//render footer content
DrillForContent(footer, renderer, elementHandlers);
//set bottom margin to previous height including the footer height
renderer.pdf.margins_doc.bottom += footerHeight;
//important for other plugins (e.g. table) to start rendering at correct position after header
renderer.y = oldPosition;
};
//check if footer contains totalPages which shoudl be replace at the disoposal of the document
var spans = footer.getElementsByTagName('span');
for (var i = 0; i < spans.length; ++i) {
if ((" " + spans[i].className + " ").replace(/[\n\t]/g, " ").indexOf(" totalPages ") > -1) {
renderer.pdf.internal.events.subscribe('htmlRenderingFinished', renderer.pdf.putTotalPages.bind(renderer.pdf, '###jsPDFVarTotalPages###'), true);
}
}
//register event to render footer on every new page
renderer.pdf.internal.events.subscribe('addPage', renderFooter, false);
//render footer on first page
renderFooter();
//prevent footer rendering
SkipNode['FOOTER'] = 1;
}
};
答案 5 :(得分：1)
Stephen Collins是最好的答案！它与jspdf-autotable插件一起很好地工作。
通过此操作将所有文档添加到文档中，因此我们可以轻松使用总页数！
为斯蒂芬·柯林斯（Stephen Collins）答案添加一些样式：“ 第x页，总计”
const addFooters = doc => {
const pageCount = doc.internal.getNumberOfPages()
doc.setFont('helvetica', 'italic')
doc.setFontSize(8)
for (var i = 0; i < pageCount; i++) {
doc.text('Page ' + String(i + 1) + ' of ' + String(pageCount), doc.internal.pageSize.width / 2, 287, {
align: 'center'
})
}
}
let doc = new jsPDF()
doc.text(...)
doc.autoTable(...)
addFooters(doc)
doc.save()
答案 6 :(得分：0)
在运行doc.save()
function addFooters() {
const pageCount = doc.internal.getNumberOfPages();
for(var i = 0; i < pageCount; i++) {
doc.text(String(i),196,285);
}
}