版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/qq_39759115/article/details/82734459
解决办法~canvas
//下载图片到本地
export function downloadIamge(imgsrc, name) {
//下载图片地址和图片名
var image = new Image();
// 解决跨域 Canvas 污染问题
image.setAttribute('crossOrigin', 'anonymous');
image.onload = function () {
var canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;
var context = canvas.getContext('2d');
context.drawImage(image, 0, 0, image.width, image.height);
var _dataURL = canvas.toDataURL('image/png'); //得到图片的base64编码数据
var blob_ = dataURLtoBlob(_dataURL ); // 用到Blob是因为图片文件过大时,在一部风浏览器上会下载失败,而Blob就不会
var url= {
name: name || "图片.png", // 图片名称不需要加.png后缀名
src: blob_
};
if (window.navigator.msSaveOrOpenBlob) { // if browser is IE
navigator.msSaveBlob(url.src, url.name );//filename文件名包括扩展名,下载路径为浏览器默认路径
} else {
var link = document.createElement("a");
link.setAttribute("href", window.URL.createObjectURL(url.src));
link.setAttribute("download", url.name + '.png');
document.body.appendChild(link);
link.click();
}
};
image.src = imgsrc;
function dataURLtoBlob(dataurl) {
var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
return new Blob([u8arr], { type: mime });
}
}