yl-gzh/components/lzc-OCR/common/base64.js

/**
 * @description 本地图片转base64方法（兼容APP、H5、小程序）
 * @param {number} path 图片本地路径
 * @returns Promise对象
 */
const toBase64 = (path) => {
	return new Promise((resolve, reject) => {
		// #ifdef APP-PLUS
		plus.io.resolveLocalFileSystemURL(path, (entry) => {
			entry.file((file) => {
				let fileReader = new plus.io.FileReader()
				fileReader.readAsDataURL(file)
				fileReader.onloadend = (evt) => {
					let base64 = evt.target.result.split(",")[1]
					resolve(base64)
				}
			})
		})
		// #endif
		// #ifdef H5
		uni.request({
			url: path,
			responseType: 'arraybuffer',
			success: (res) => {
				resolve(uni.arrayBufferToBase64(res.data))
			}
		})
		// #endif
		// #ifdef MP-WEIXIN
		uni.getFileSystemManager().readFile({
			filePath: path,
			encoding: 'base64',
			success: (res) => {
				resolve(res.data)
			}
		})
		// #endif
	})
}

export {
	toBase64
}