52,797
社区成员
发帖
与我相关
我的任务
分享
//保存海报
function downloadImg(){
html2canvas($(".active")[0]).then(function (canvas) {
$('#snapshot').attr('src',canvas.toDataURL('image/png'));
download(canvas.toDataURL('image/png'));
msg.alert('海报已下载!');
});
}
//下载图片
function download(da){
let imgData = da;
this.downloadFile('share.png', imgData);
}
//下载
function downloadFile(fileName, content){
let aLink = document.createElement('a');
let blob = this.base64ToBlob(content); //new Blob([content]);
let evt = document.createEvent("HTMLEvents");
evt.initEvent("click", true, true);//initEvent 不加后两个参数在FF下会报错 事件类型,是否冒泡,是否阻止浏览器的默认行为
aLink.download = fileName;
aLink.href = URL.createObjectURL(blob);
aLink.click()
}
//base64转blob
function base64ToBlob(code){
let parts = code.split(';base64,');
let contentType = parts[0].split(':')[1];
let raw = window.atob(parts[1]);
let rawLength = raw.length;
let uInt8Array = new Uint8Array(rawLength);
for (let i = 0; i < rawLength; ++i) {
uInt8Array[i] = raw.charCodeAt(i);
}
return new Blob([uInt8Array], {type: contentType});
}