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@@ -63,10 +63,73 @@
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deletePic(event) {
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this.fileList.splice(event.index, 1)
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},
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+ // 图片压缩
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+ compressH5(urlData, targetSizeKB, initialQuality = 1.0) {
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+ const maxQuality = 1.0;
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+ const minQuality = 0.0;
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+ const tolerance = 0.01; // 根据需要调整公差
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+ let that = this
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+ return new Promise((resolve, reject) => {
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+ let binarySearch = (min, max) => {
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+ const midQuality = (min + max) / 2;
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+ uni.getImageInfo({
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+ src: urlData.url,
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+ success(res) {
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+ let img = new Image()
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+ img.src = res.path
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+ img.onload = function() {
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+ const canvas = document.createElement('canvas');
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+ const ctx = canvas.getContext('2d');
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+
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+ canvas.width = img.width;
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+ canvas.height = img.height;
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+
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+ ctx.clearRect(0, 0, canvas.width, canvas.height);
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+ ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
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+
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+ // 使用异步的 toBlob 方法
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+ canvas.toBlob(async (blob) => {
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+ const fileSizeKB = blob.size / 1024;
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+ if (Math.abs(fileSizeKB - targetSizeKB) <
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+ tolerance || max - min < tolerance) {
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+ // 当前质量足够接近目标大小，使用当前质量解析
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+ const dataUrl = canvas.toDataURL(urlData.type, midQuality);
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+ let result = that
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+ .uploadFilePromise(dataUrl)
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+ setTimeout(() => {
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+ resolve(
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+ result)
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+ }, 1000)
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+
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+ } else if (fileSizeKB > targetSizeKB) {
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+ // 如果文件大小太大，降低质量，继续二分查找
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+ binarySearch(min, midQuality);
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+ } else {
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+ // 如果文件大小太小，增加质量，继续二分查找
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+ binarySearch(midQuality, max);
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+ }
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+ }, urlData.type, midQuality);
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+ };
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+ },
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+ fail() {
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+ uni.showModal({
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+ title: '提示',
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+ content: '图片压缩失败',
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+ showCancel: false
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+ });
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+ }
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+ })
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+ }
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+ // 开始二分查找
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+ binarySearch(minQuality, maxQuality);
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+ })
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+ },
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// 新增图片
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async afterRead(event) {
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+
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// 当设置 multiple 为 true 时, file 为数组格式，否则为对象格式
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let lists = [].concat(event.file)
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+
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let fileListLen = this.fileList.length
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lists.map((item) => {
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this.fileList.push({
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@@ -76,7 +139,15 @@
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})
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})
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for (let i = 0; i < lists.length; i++) {
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- const result = await this.uploadFilePromise(lists[i])
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+
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+ let result = ""
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+ if (lists[i].size > (200 * 1024)) {
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+ result = await this.compressH5(lists[i], 150);
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+
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+ } else {
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+ result = await this.uploadFilePromise(lists[i].url)
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+ }
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+
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let item = this.fileList[fileListLen]
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this.fileList.splice(fileListLen, 1, Object.assign(item, {
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@@ -93,12 +164,11 @@
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return new Promise((resolve, reject) => {
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let a = uni.uploadFile({
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url: this.BASE_URL + '/gwfile/upload?uploadPath=signature',
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- filePath: url.url,
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+ filePath: url,
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name: 'file',
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header: {
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"token": $auth.getUserToken()
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},
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- formData: url,
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success: (res) => {
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setTimeout(() => {
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resolve(res.data)
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