在移动设备上使用jsPDF下载 [英] Download using jsPDF on a mobile devices

问题描述

我有一个包含使用jsPDF的下载按钮的页面。在台式机上，它应该下载页面。但是， pdf.save（）在我的平板电脑或手机上无效。

I have a page that includes a download button using jsPDF. On desktop machines it downloads the page as it should. However, pdf.save() does not work on my tablet or phone.

我试图添加一个特殊的移动设备在新窗口中打开PDF的情况，因为移动设备不会下载与桌面相同的东西，其想法是，一旦PDF在新窗口中打开，用户可以选择手动保存。 / p>

I tried to add a special case for mobile devices to open the PDF in a new window, since mobile devices don't download things the same as desktops, with the idea being that once the PDF is open in a new window the user can choose to save it manually.

var pdf = new jsPDF('p', 'pt', 'letter');
var specialElementHandlers = {
    '#editor': function (element, renderer) {
        return true;
    }
};

html2canvas($("#pdf-area"), {
    onrendered: function (canvas) {
        $("#pdf-canvas").append(canvas);
        $("#pdf-canvas canvas").css("padding", "20px");
    }
});

var options = {
    pagesplit: true
};

function download(doctitle) {
    pdf.addHTML($("#pdf-area")[0], options, function () {
        if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
            pdf.output('dataurlnewwindow');           
        } else {
            pdf.save(doctitle);
        }        
    });
}

但是下载功能在我的平板电脑/手机上仍然没有任何功能。我用它来测试它，以确保pdf.output（）函数正常工作：

But the download function still does nothing on my tablet/phone. I tested it with this to make sure the pdf.output() function was working:

    pdf.addHTML($("#pdf-area")[0], options, function () {
        pdf.output('dataurlnewwindow');                
    });

，它仍然可以在桌面上工作，但在移动设备上不起作用。

and it does still work on desktop, but does nothing on mobile.

推荐答案

如果您使用Cordova平台进行开发，这里是一个例子：

Here is the example if you're using the Cordova platform for your development:

< a href =https://github.com/saharcasm/Cordova-jsPDF-Email =nofollow noreferrer> https://github.com/saharcasm/Cordova-jsPDF-Email

未在设备中下载的PDF的解决方法是使用cordova-plugin-file。

The workaround of the pdf not being downloaded in the devices is to use cordova-plugin-file.

使用输出法在文件上，将给你需要编写的原始pdf保存在一个文件中。

Use the output method on the doc that will give you the raw pdf which needs to be written & saved in a file.

例如，

var doc = new JsPDF(); 
//... some work with the object
var pdfOutput = doc.output("blob"); //returns the raw object of the pdf file

然后通过使用pdfOutput将其写入实际文件文件插件。

The pdfOutput is then written on an actual file by using the file plugin.

这篇关于在移动设备上使用jsPDF下载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！