将base64图像数据转换为angularjs中的图像文件 [英] Convert base64 image data to image file in angularjs

问题描述

在将base64文件转换为angularjs中的图像时获取损坏的文件任何人都可以建议我如何将base64文件转换为angularjs中的图像

getting corrupted file while converting base64 file to image in angularjs can anyone suggest me how to convert base64 file to image in angularjs

我正在使用此方法转换base64 file to image

I am using this method to convert base64 file to image

var imageBase64 = "image base64 data";
var blob = new Blob([imageBase64], {type: 'image/png'});

从这个blob中，你可以生成文件对象。

From this blob, you can generate file object.

var file = new File([blob], 'imageFileName.png');

推荐答案

首先，将dataURL转换为Blob
这样做

First, you convert dataURL to Blob do this

var blob = dataURItoBlob(imageBase64);

function dataURItoBlob(dataURI) {

            // convert base64/URLEncoded data component to raw binary data held in a string
            var byteString;
            if (dataURI.split(',')[0].indexOf('base64') >= 0)
                byteString = atob(dataURI.split(',')[1]);
            else
                byteString = unescape(dataURI.split(',')[1]);

            // separate out the mime component
            var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];

            // write the bytes of the string to a typed array
            var ia = new Uint8Array(byteString.length);
            for (var i = 0; i < byteString.length; i++) {
                ia[i] = byteString.charCodeAt(i);
            }

            return new Blob([ia], {type:mimeString});
        }

然后

var file = new File([blob], "fileName.jpeg", {
            type: "'image/jpeg'"
          });

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