uni-app 使用 uni-form-item报错

先安装

npm i @dcloudio/uni-ui  

然后在page.json里面加

"easycom": {
		  "autoscan": true,
		  "custom": {
			 "^uni-(.*)": "@dcloudio/uni-ui/lib/uni-$1/uni-$1.vue"
		  }
		}