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19 lines
565 B
19 lines
565 B
/**
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* 字符串转二进制 unable
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*
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* @type signature
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* String a -> String b -> Blob c
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*/
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export default (mime, data) => {
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// dataURL 的格式为 “data:image/png;base64,****”,逗号之前都是一些说明性的文字，我们只需要逗号之后的就行了
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data = data.split(',')[1];
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data = window.atob(data);
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const ia = new Uint8Array(data.length);
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for (let i = 0; i < data.length; i++) {
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ia[i] = data.charCodeAt(i);
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}
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// canvas.toDataURL 返回的默认格式就是 image/png
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return new Blob([ia], {
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type: mime
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});
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}
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