Javascript - 从 ArrayBuffer 中获取数据？
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Javascript - get data out of ArrayBuffer?
提问by Ben
I've got a drag and drop script that uses readAsArrayBuffer(). The length of the buffer is perfect, but I can't seem to figure out how to pull the data out of the buffer.
我有一个使用readAsArrayBuffer(). 缓冲区的长度是完美的，但我似乎无法弄清楚如何将数据拉出缓冲区。
Apparently I've got to make a DataViewor an Uint8Arrayor something, then iterate through its byteLength...help!
显然我必须制作一个DataView或一个Uint8Array或其他东西，然后遍历它的byteLength...帮助！
EDITPertinent code (there's not much of it):
编辑相关代码（内容不多）：
var reader = new FileReader();
reader.onload = function(e) {
// do something with e.target.result, which is an ArrayBuffer
}
reader.readAsArrayBuffer(someFileHandle);
采纳答案by haylem
This might change based on your answer to my comment, but if I assume that you are using a FileReadersomewhere, you need to read it's resultattribute in the loadedcallback that you need to provide:
这可能会根据您对我的评论的回答而改变，但是如果我假设您正在使用FileReader某个地方，则需要result在loaded您需要提供的回调中读取它的属性：
function loaded(evt) {
var datastring = evt.target.result;
// do something here
}
reader.onload = loaded; // where reader is a FileReader, FileReaderSync
Update:Ah, I see. Well then your best course of action is to follow to this duplicate:
更新：啊，我明白了。那么你最好的行动方案是遵循这个副本：
Converting between strings and ArrayBuffers
Update2:Note that you could probably use readAsText()then, but I don't know if you're at liberty to do this.
更新 2：请注意，您可能会在readAsText()那时使用，但我不知道您是否可以自由执行此操作。
