<el-row><el-col :span="24"><el-form-item label="使用数据：" prop="timeLimit"><el-button type="primary" size="small" @click="serverAdd" :disabled="checkFlag">添加</el-button></el-form-item></el-col><el-col :span="24"><el-form-item label="使用数据：" prop="timeLimit"><el-button type="primary" size="small" @click="serverAdd" :disabled="checkFlag">添加</el-button></el-form-item></el-col></el-row>
row里面有多个 col 时，col里面 click 事件可能监听不到
