如何在angularjs中将图像从base64string转换为byte[]数组

ryevplcw 于 2021-09-29 发布在 Java

关注(0)|答案(2)|浏览(384)

我正在尝试将图像转换为字节数组。下面是我返回该图像的base64string的代码：

$scope.imageAdded = function (files) {
        angular.forEach(files,
            function (flowFile, i) {
                var fileReader = new FileReader();
                fileReader.onload = function (event) {
                    var uri = event.target.result;
                    $scope.imageStrings[i] = uri;
                };
                fileReader.readAsDataURL(flowFile.file);
                event.preventDefault(); //prevent file from uploading
            });
    }

任何形式的帮助都将不胜感激

JavaScript angularjs angularjs-directive

来源：https://stackoverflow.com/questions/68357746/how-to-convert-image-from-base64string-to-byte-array-in-angularjs

2条答案

按热度按时间

eqoofvh91#

试试这个

$scope.base64toByteArray = function(b64Data, contentType = '', sliceSize = 512) => {
        const byteCharacters = atob(b64Data);
        const byteArrays = [];

        for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
          const slice = byteCharacters.slice(offset, offset + sliceSize);

          const byteNumbers = new Array(slice.length);
          for (let i = 0; i < slice.length; i++) {
            byteNumbers[i] = slice.charCodeAt(i);
          }

          const byteArray = new Uint8Array(byteNumbers);
          byteArrays.push(byteArray);
        } 
        return byteArrays;
      }

赞(0）回复(0）举报 2021-09-29

6ss1mwsb2#

$scope.imageAdded = async function imageAdded (flowFiles) {
    const arrayBuffer = await flowFiles[0].file.arrayBuffer()
    const uint8array = new Uint8Array(arrayBuffer)
}

赞(0）回复(0）举报 2021-09-29

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如何在angularjs中将图像从base64string转换为byte[]数组

2条答案

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