说明：在使用el-table自带的底部合计功能时，初始界面不会显示合计内容

解决方案：使用 doLayout()方法

updated() {
		this.$nextTick(() => {
			this.$refs['inventorySumTable'].doLayout();
		});
	},

完整代码：

 // show-summary：展示合计行
 // summary-method:自定义合计方法
 // ref="inventorySumTable"：绑定表格
            <el-table
				border
				height="100%"
				:data="tableList"
				v-loading="tableLoading"
				show-summary
				:summary-method="getSummaries"
				ref="inventorySumTable"
				:cell-style="changeCellStyle"
			>
				<el-table-column
					label="序号"
					prop="index"
					type="index"
					width="55"
					align="center"
					header-align="center"
				></el-table-column>
				<el-table-column
					label="使用单位(科室)"
					prop="useDept"
					align="center"
					header-align="center"
					show-overflow-tooltip
				></el-table-column>
				<el-table-column
					label="资产分类"
					prop="typeName"
					align="center"
					header-align="center"
					show-overflow-tooltip
				>
				</el-table-column>
				<el-table-column
					label="折旧合计"
					prop="sumDepreciation"
					align="center"
					header-align="center"
					show-overflow-tooltip
				></el-table-column>
			</el-table>



//定义合计的方法
        getSummaries(param) {
			const { columns, data } = param;
			const sums = [];
			columns.forEach((column, index) => {
				if (index === 0) {
					sums[index] = '合计';
					return;
				}
				const values = data.map(item => Number(item[column.property]));
				if (
					!values.every(value => {
						return isNaN(value);
					})
				) {
					console.log(sums, column.property, 226);
					if (column.property == 'sumDepreciation') {
						sums[index] = values.reduce((prev, curr) => {
							const value = Number(curr);
							if (!isNaN(value)) {
								return prev + curr;
							} else {
								return prev;
							}
						}, 0);
					}
					if (column.property == 'sumDepreciation') {
						return (sums[index] = this.formatePrice(sums[index]));
					}
				} else {
					sums[index] = '';
				}
			});

			return sums;
		},

效果展示：