将blob转换为base64 [英] Convert blob to base64

问题描述

这是我想要执行的代码的片段 Blob 到 Base64 字符串：

This is a snippet for the code that I want to do Blob to Base64 string:

这个评论的部分有效，当由此生成的URL设置为img src时，它会显示图像：

This commented part works and that when the URL generated by this is set to img src it displays the image:

var blob = items[i].getAsFile();
//var URLObj = window.URL || window.webkitURL;
//var source = URLObj.createObjectURL(blob);
//console.log("image source=" + source);

var reader = new FileReader();
reader.onload = function(event){
console.log(event.target.result)
}; // data url!
var source = reader.readAsBinaryString(blob);

问题在于代码越低，生成的源变量为null

The problem is with the the lower code, the source variable generated is null

更新：

使用JQuery是否有更简单的方法可以创建Base64字符串来自Blob文件，如上面的代码？

Is there an easier way to do this with JQuery to be able to create Base64 String from Blob file as in the code above?

推荐答案

 var reader = new FileReader();
 reader.readAsDataURL(blob); 
 reader.onloadend = function() {
     base64data = reader.result;                
     console.log(base64data);
 }

形成 docs readAsDataURL 编码为base64

Form the docs readAsDataURL encodes to base64

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