前端base64与图片相互转换(附代码)
作者：MoXinXueWEB
有时候会遇到要把前端发送过来的图片的文件base64编码转化成图片,所以下面这篇文章主要给大家介绍了关于前端base64与图片相互转换的相关资料,需要的朋友可以参考下
base64转图片
如下图：（后端返回的数据）
<img :src="baseImg" > let baseImg = "" this.baseImg ="data:image/png;base64," + data?.flowChar
base64转换图片文件
base64ImgtoFile = (dataurl, filename = 'file') => {
let arr = dataurl.split(',')
let mime = arr[0].match(/:(.*?);/)[1]
let suffix = mime.split('/')[1]
let bstr = atob(arr[1])
let n = bstr.length
let u8arr = new Uint8Array(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n)
}
return new File([u8arr], `${filename}.${suffix}`, {
type: mime
})
}，
// base64编码的图片
baseImg = 'data:image/png;base64,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';
//转换图片文件
const imgFile = base64ImgtoFile(baseImg);
console.log("imgFile",imgFile);
图片(url)转换base64
getBase64 = (url, callback) => {
let Img = new Image(),
dataURL = '';
Img.src = url + '?v=' + Math.random();
Img.setAttribute('crossOrigin', 'Anonymous');
Img.onload = function() {
let canvas = document.createElement('canvas'),
width = Img.width,
height = Img.height;
canvas.width = width;
canvas.height = height;
canvas.getContext('2d').drawImage(Img, 0, 0, width, height);
dataURL = canvas.toDataURL('image/jpeg', 1); //可选取多种模式
return callback ? callback(dataURL) : null; //回掉函数获取Base64编码
};
}
// 调用
let imgUrl=‘https://www.baidu.com/img/bd_logo1.png'
this.getBase64(imgUrl, dataURL => {
console.log(dataURL:就是base64了)
});便捷的图片转化base64
利用 Chrome 浏览器，在 chrome 下新建一个窗口，然后把要转化的图片直接拖入浏览器，打开控制台，点 Source，如下图所示，点击图片，右侧就会显示该图片的 base64 编码
总结
到此这篇关于前端base64与图片相互转换的文章就介绍到这了,更多相关base64与图片相互转换内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！