图片上传并压缩

<uni-file-picker v-model="pageData.cardForntValue" class="my-upload" file-mediatype="all"
		fileMediatype="image" :sizeType="['compressed']" ref="files" mode="grid" :auto-upload="false"
		@select="changeImg(1, $event)" :limit="1"
		:imageStyles="{border: false, width: '320rpx', height: '210rpx'}">
		<view
			class="w-100 h-100 bd-photo-dashed border-radius-12 flex flex-column flex-align-center flex-justify-center">
			<u-icon name="photo" size="60"></u-icon>
			<text class="mgt-10 c-text-4">身份证正面</text>
		</view>
	</uni-file-picker>

const pageData = reactive({
		cardForntValue: [],
		cardBackValue: []
	})

const changeImg = async (type, e) => {
		const {
			tempFiles,
			tempFilePaths
		} = e;
		let file = tempFiles[0].file;
		let img = await proxy.Pub.compressImg(file);
		let res = await proxy.$http.postFile(img);
		if (res.code == 200) {
			if (type == 1) {
				formData.front_id_card = res.data.path;
			} else {
				formData.after_id_card = res.data.path;
			}
		}
	}