我想创建一个输入按钮“保存图像”:
我已经找到了如何使用html2canvas创建潜水屏幕并在新标签中打开它,它完美无缺:
function printDiv2(div)
{
html2canvas((div), {
onrendered: function(canvas) {
var img = canvas.toDataURL();
window.open(img);
}
});
}
但是对于你保存为部分,是一种困难的部分...我发现了有趣的话题,因为我是JS(和对象)编码的新手,我有点困惑......我想我将不得不使用FileSaver.js并创建一个新的blob http://eligrey.com/blog/post/saving-generated-files-on-the-client-side/
但我不知道如何在我的html2canvas中实现saveAs,如何正确地投射新的blob ......
function printDiv2(div)
{
html2canvas((div), {
onrendered: function(canvas) {
var img = canvas.toDataURL();
window.open(img);
var blob = new Blob(img, {type: "image/jpeg"});
var filesaver = saveAs(blob, "my image.png");
}
});
}
此外,我尝试通过提取base64生成的URL来做一些事情,但是对于我来说理解每一个事情太复杂了: http://bl.ocks.org/nolanlawson/0eac306e4dac2114c752
但是有人给我一些提示并帮助我吗?
答案 0 :(得分:9)
你可以这样做:
//Creating dynamic link that automatically click
function downloadURI(uri, name) {
var link = document.createElement("a");
link.download = name;
link.href = uri;
link.click();
//after creating link you should delete dynamic link
//clearDynamicLink(link);
}
//Your modified code.
function printToFile(div) {
html2canvas(div, {
onrendered: function (canvas) {
var myImage = canvas.toDataURL("image/png");
//create your own dialog with warning before saving file
//beforeDownloadReadMessage();
//Then download file
downloadURI("data:" + myImage, "yourImage.png");
}
});
}
答案 1 :(得分:6)
这是最终的代码,如果它可以帮助你:
function PrintDiv(div)
{
html2canvas((div), {
onrendered: function(canvas) {
var myImage = canvas.toDataURL();
downloadURI(myImage, "MaSimulation.png");
}
});
}
function downloadURI(uri, name) {
var link = document.createElement("a");
link.download = name;
link.href = uri;
document.body.appendChild(link);
link.click();
//after creating link you should delete dynamic link
//clearDynamicLink(link);
}
答案 2 :(得分:1)
答案 3 :(得分:1)
这对我来说很好。
function downloadURI(uri, name) {
var link = document.createElement("a");
link.download = name;
link.href = uri;
document.body.appendChild(link);
link.click();
clearDynamicLink(link);
}
function DownloadAsImage() {
var element = $("#table-card")[0];
html2canvas(element).then(function (canvas) {
var myImage = canvas.toDataURL();
downloadURI(myImage, "cartao-virtual.png");
});
}