369 lines
8.1 KiB
JavaScript
369 lines
8.1 KiB
JavaScript
export const networkReg = /^(http|\/\/)/;
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export const isBase64 = (path) => /^data:image\/(\w+);base64/.test(path);
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export function sleep(delay) {
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return new Promise(resolve => setTimeout(resolve, delay))
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}
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let {platform, SDKVersion} = uni.getSystemInfoSync()
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export const isPC = /windows|mac/.test(platform)
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// 缓存图片
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let cache = {}
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export function isNumber(value) {
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return /^-?\d+(\.\d+)?$/.test(value);
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}
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export function toPx(value, baseSize, isDecimal = false) {
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// 如果是数字
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if (typeof value === 'number') {
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return value
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}
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// 如果是字符串数字
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if (isNumber(value)) {
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return value * 1
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}
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// 如果有单位
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if (typeof value === 'string') {
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const reg = /^-?([0-9]+)?([.]{1}[0-9]+){0,1}(em|rpx|px|%)$/g
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const results = reg.exec(value);
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if (!value || !results) {
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return 0;
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}
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const unit = results[3];
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value = parseFloat(value);
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let res = 0;
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if (unit === 'rpx') {
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res = uni.upx2px(value);
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} else if (unit === 'px') {
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res = value * 1;
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} else if (unit === '%') {
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res = value * toPx(baseSize) / 100;
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} else if (unit === 'em') {
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res = value * toPx(baseSize || 14);
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}
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return isDecimal ? res.toFixed(2) * 1 : Math.round(res);
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}
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return 0
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}
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// 计算版本
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export function compareVersion(v1, v2) {
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v1 = v1.split('.')
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v2 = v2.split('.')
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const len = Math.max(v1.length, v2.length)
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while (v1.length < len) {
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v1.push('0')
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}
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while (v2.length < len) {
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v2.push('0')
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}
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for (let i = 0; i < len; i++) {
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const num1 = parseInt(v1[i], 10)
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const num2 = parseInt(v2[i], 10)
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if (num1 > num2) {
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return 1
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} else if (num1 < num2) {
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return -1
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}
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}
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return 0
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}
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function gte(version) {
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// #ifdef MP-ALIPAY
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SDKVersion = my.SDKVersion
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// #endif
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return compareVersion(SDKVersion, version) >= 0;
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}
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export function canIUseCanvas2d() {
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// #ifdef MP-WEIXIN
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return gte('2.9.2');
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// #endif
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// #ifdef MP-ALIPAY
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return gte('2.7.15');
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// #endif
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// #ifdef MP-TOUTIAO
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return gte('1.78.0');
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// #endif
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return false
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}
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// #ifdef MP
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export const prefix = () => {
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// #ifdef MP-TOUTIAO
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return tt
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// #endif
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// #ifdef MP-WEIXIN
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return wx
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// #endif
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// #ifdef MP-BAIDU
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return swan
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// #endif
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// #ifdef MP-ALIPAY
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return my
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// #endif
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// #ifdef MP-QQ
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return qq
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// #endif
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// #ifdef MP-360
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return qh
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// #endif
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}
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// #endif
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/**
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* base64转路径
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* @param {Object} base64
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*/
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export function base64ToPath(base64) {
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const [, format] = /^data:image\/(\w+);base64,/.exec(base64) || [];
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return new Promise((resolve, reject) => {
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// #ifdef MP
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const fs = uni.getFileSystemManager()
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//自定义文件名
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if (!format) {
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reject(new Error('ERROR_BASE64SRC_PARSE'))
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}
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const time = new Date().getTime();
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let pre = prefix()
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// #ifdef MP-TOUTIAO
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const filePath = `${pre.getEnvInfoSync().common.USER_DATA_PATH}/${time}.${format}`
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// #endif
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// #ifndef MP-TOUTIAO
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const filePath = `${pre.env.USER_DATA_PATH}/${time}.${format}`
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// #endif
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fs.writeFile({
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filePath,
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data: base64.split(',')[1],
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encoding: 'base64',
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success() {
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resolve(filePath)
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},
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fail(err) {
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console.error(err)
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reject(err)
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}
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})
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// #endif
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// #ifdef H5
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// mime类型
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let mimeString = base64.split(',')[0].split(':')[1].split(';')[0];
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//base64 解码
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let byteString = atob(base64.split(',')[1]);
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//创建缓冲数组
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let arrayBuffer = new ArrayBuffer(byteString.length);
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//创建视图
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let intArray = new Uint8Array(arrayBuffer);
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for (let i = 0; i < byteString.length; i++) {
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intArray[i] = byteString.charCodeAt(i);
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}
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resolve(URL.createObjectURL(new Blob([intArray], {
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type: mimeString
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})))
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// #endif
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// #ifdef APP-PLUS
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const bitmap = new plus.nativeObj.Bitmap('bitmap' + Date.now())
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bitmap.loadBase64Data(base64, () => {
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if (!format) {
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reject(new Error('ERROR_BASE64SRC_PARSE'))
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}
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const time = new Date().getTime();
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const filePath = `_doc/uniapp_temp/${time}.${format}`
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bitmap.save(filePath, {},
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() => {
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bitmap.clear()
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resolve(filePath)
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},
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(error) => {
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bitmap.clear()
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reject(error)
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})
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}, (error) => {
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bitmap.clear()
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reject(error)
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})
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// #endif
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})
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}
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/**
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* 路径转base64
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* @param {Object} string
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*/
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export function pathToBase64(path) {
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if (/^data:/.test(path)) return path
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return new Promise((resolve, reject) => {
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// #ifdef H5
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let image = new Image();
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image.setAttribute("crossOrigin", 'Anonymous');
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image.onload = function() {
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let canvas = document.createElement('canvas');
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canvas.width = this.naturalWidth;
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canvas.height = this.naturalHeight;
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canvas.getContext('2d').drawImage(image, 0, 0);
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let result = canvas.toDataURL('image/png')
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resolve(result);
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canvas.height = canvas.width = 0
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}
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image.src = path + '?v=' + Math.random()
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image.onerror = (error) => {
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reject(error);
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};
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// #endif
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// #ifdef MP
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if (uni.canIUse('getFileSystemManager')) {
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uni.getFileSystemManager().readFile({
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filePath: path,
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encoding: 'base64',
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success: (res) => {
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resolve('data:image/png;base64,' + res.data)
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},
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fail: (error) => {
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console.error({error, path})
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reject(error)
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}
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})
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}
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// #endif
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// #ifdef APP-PLUS
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plus.io.resolveLocalFileSystemURL(getLocalFilePath(path), (entry) => {
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entry.file((file) => {
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const fileReader = new plus.io.FileReader()
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fileReader.onload = (data) => {
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resolve(data.target.result)
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}
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fileReader.onerror = (error) => {
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reject(error)
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}
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fileReader.readAsDataURL(file)
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}, reject)
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}, reject)
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// #endif
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})
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}
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export function getImageInfo(path, useCORS) {
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const isCanvas2D = this && this.canvas && this.canvas.createImage
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return new Promise(async (resolve, reject) => {
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// let time = +new Date()
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let src = path.replace(/^@\//,'/')
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if (cache[path] && cache[path].errMsg) {
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resolve(cache[path])
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} else {
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try {
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// #ifdef MP || APP-PLUS
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if (isBase64(path) && (isCanvas2D ? isPC : true)) {
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src = await base64ToPath(path)
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}
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// #endif
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// #ifdef H5
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if(useCORS) {
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src = await pathToBase64(path)
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}
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// #endif
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} catch (error) {
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reject({
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...error,
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src
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})
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}
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// #ifndef APP-NVUE
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if(isCanvas2D && !isPC) {
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const img = this.canvas.createImage()
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img.onload = function() {
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const image = {
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path: img,
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width: img.width,
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height: img.height
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}
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cache[path] = image
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resolve(cache[path])
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}
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img.onerror = function(err) {
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reject({err,path})
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}
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img.src = src
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return
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}
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// #endif
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uni.getImageInfo({
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src,
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success: (image) => {
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const localReg = /^\.|^\/(?=[^\/])/;
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// #ifdef MP-WEIXIN || MP-BAIDU || MP-QQ || MP-TOUTIAO
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image.path = localReg.test(src) ? `/${image.path}` : image.path;
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// #endif
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if(isCanvas2D) {
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const img = this.canvas.createImage()
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img.onload = function() {
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image.path = img
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cache[path] = image
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resolve(cache[path])
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}
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img.onerror = function(err) {
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reject({err,path})
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}
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img.src = src
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return
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}
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// #ifdef APP-PLUS
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// console.log('getImageInfo', +new Date() - time)
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// ios 比较严格 可能需要设置跨域
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if(uni.getSystemInfoSync().osName == 'ios' && useCORS) {
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pathToBase64(image.path).then(base64 => {
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image.path = base64
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cache[path] = image
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resolve(cache[path])
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}).catch(err => {
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console.error({err, path})
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reject({err,path})
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})
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return
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}
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// #endif
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cache[path] = image
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resolve(cache[path])
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},
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fail(err) {
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console.error({err, path})
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reject({err,path})
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}
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})
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}
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})
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}
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// #ifdef APP-PLUS
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const getLocalFilePath = (path) => {
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if (path.indexOf('_www') === 0 || path.indexOf('_doc') === 0 || path.indexOf('_documents') === 0 || path
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.indexOf('_downloads') === 0) {
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return path
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}
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if (path.indexOf('file://') === 0) {
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return path
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}
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if (path.indexOf('/storage/emulated/0/') === 0) {
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return path
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}
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if (path.indexOf('/') === 0) {
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const localFilePath = plus.io.convertAbsoluteFileSystem(path)
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if (localFilePath !== path) {
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return localFilePath
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} else {
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path = path.substr(1)
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}
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}
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return '_www/' + path
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}
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// #endif
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