{"id":5199,"date":"2025-04-28T11:45:34","date_gmt":"2025-04-28T03:45:34","guid":{"rendered":"https:\/\/support.fuxinsoft.cn\/?p=5199"},"modified":"2025-05-19T15:20:45","modified_gmt":"2025-05-19T07:20:45","slug":"%e4%bd%bf%e7%94%a8%e5%9b%be%e7%ab%a0%e5%b7%a5%e5%85%b7%e5%9c%a8%e9%a1%b5%e9%9d%a2%e4%b8%8a%e6%b7%bb%e5%8a%a0%e8%87%aa%e5%ae%9a%e4%b9%89%e5%9b%be%e7%ab%a0%e6%97%b6%ef%bc%8c%e5%a6%82%e4%bd%95%e6%8b%bf","status":"publish","type":"post","link":"https:\/\/support.fuxinsoft.cn\/?p=5199","title":{"rendered":"\u5982\u4f55\u5728\u6dfb\u52a0\u81ea\u5b9a\u4e49\u56fe\u7ae0\u65f6\u83b7\u53d6\u5176Base64\u6570\u636e\uff1f\u2014\u57fa\u4e8eannotationAdded\u4e8b\u4ef6\u7684\u5b9e\u73b0\u65b9\u6848"},"content":{"rendered":"\n

\u4f7f\u7528\u56fe\u7ae0\u5de5\u5177\u5728\u9875\u9762\u4e0a\u6dfb\u52a0\u81ea\u5b9a\u4e49\u56fe\u7ae0\u65f6\uff0c\u5f00\u53d1\u8005\u53ef\u80fd\u9700\u8981\u83b7\u53d6\u5f53\u524d\u56fe\u7ae0\u7684\u56fe\u50cf\u6570\u636e\uff08\u5982Base64\u683c\u5f0f\uff09\u3002\u901a\u8fc7\u76d1\u542cannotationAdded\u4e8b\u4ef6\uff0c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u8fd9\u4e00\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u5177\u4f53\u5b9e\u73b0\u65b9\u6cd5\uff1a<\/p>\n\n\n\n

\u5f53\u5728\u9875\u9762\u4e0a\u6dfb\u52a0\u6ce8\u91ca\u65f6\uff0c\u7cfb\u7edf\u4f1a\u89e6\u53d1annotationAdded\u4e8b\u4ef6\u3002\u5728\u8be5\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u83b7\u53d6\u5230\u521a\u6dfb\u52a0\u7684\u6ce8\u91ca\u5bf9\u8c61\u6570\u7ec4\u3002\u5bf9\u4e8e\u56fe\u7ae0\u7c7b\u578b\u7684\u6ce8\u91ca\u5bf9\u8c61\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528getImage\u63a5\u53e3\uff0c\u6309\u6307\u5b9a\u683c\u5f0f\uff08’canvas’\u3001’image’\u6216’buffer’\uff09\u83b7\u53d6\u56fe\u7ae0\u7684\u56fe\u50cf\u6570\u636e\u3002<\/p>\n\n\n\n

\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n

function blobToDataURI(blob, callback) {
    var reader = new FileReader();
    reader.readAsDataURL(blob);
    reader.onload = function (e) {
        callback(e.target.result);
    }
}
\/\/\u5728annotationAdded\u76d1\u542c\u4e8b\u4ef6\u7684\u56de\u8c03\u4e2d\u62ff\u5230Stamp\u6ce8\u91ca\u5bf9\u8c61annot\u540e\uff0c\u901a\u8fc7getImage\u63a5\u53e3\u83b7\u53d6\u56fe\u7ae0\u7684\u56fe\u50cf\u6570\u636e
pdfui.eventEmitter.on(PDF.constant.DataEvents.annotationAdded, async (annotations) => {
    let annot = annotations.find((item) => item.info.type != \"popup\");
    
    var imageBuf = await annot.getImage('buffer');
    var blob = new Blob([imageBuf], {type: 'image\/png'});

    \/\/\u4ee5png\u56fe\u7247\u5f62\u5f0f\u4e0b\u8f7d\u8be5\u56fe\u7ae0
    var url = URL.createObjectURL(blob);
    console.log(url);
    let link = document.createElement('a');
    link.style.display = 'none';
    link.href = url;
    link.setAttribute('download', \"test\");
    document.body.appendChild(link);
    link.click();
    URL.revokeObjectURL(link.href); \/\/ \u91ca\u653eURL \u5bf9\u8c61
    document.body.removeChild(link);

    \/\/\u5c06blob\u683c\u5f0f\u8f6c\u6362\u4e3abase64\u683c\u5f0f
    blobToDataURI(blob,function(result){    
        console.log(result);
    })
})

<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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