react里 render双层循环写法

render循环如下数据的写法

dataArr=[[{},{},{}],[],[],[],]

 <List className="tbBox">
         <Flex className="title">
              {data.map(item => (
                  <Flex.Item 
                      key={item.title} 
                      style={item.width?{width:'25%',flex:'none'}:null}//动态style样式
                  >
                  {item.title}
                  </Flex.Item>
              ))}
          </Flex>
          //双层循环写法
          {dataArr.map((arr,indArr)=>(//双层循环---外层
          <Flex  key={`wc${indArr}`} onClick={(e)=>{this.onRowClick(indArr,e)}}>
              {dataArr[0].map((item,index) => (//双层循环--内层
                  <Flex.Item key={`nc${item.title}${index}`}  style={item.width?{width:'25%',flex:'none'}:null}>
                      {
                          item.component==='InputItem'?
                          <InputItem
                          placeholder="请输入"
                          keyName={`${item.keyName}&${indArr}`}
                          form = {this.props.form}
                          onBlur={this.onBlur}
                          rules={item.rules}
                          type={item.type}
                          onChange = {this.onChange}
                          initialValue={item.value}
                          />
                      :(item.component==='Picker'?
                          <Picker
                              keyName={`${item.keyName}&${indArr}`}
                              placeholder="请选择"
                              data={item.data}
                              rules={item.rules}
                              form = {this.props.form}
                              onChange = {this.onChange}
                              initialValue={item.value}
                              />
                      :(item.component==='InputModal'?
                          <InputModal
                              keyName={`${item.keyName}&${indArr}`}
                              placeholder="请输入"
                              data={item.data}
                              rules={item.rules}
                              onChange = {this.onChange}
                              form = {this.props.form}
                              initialValue={item.value}
                              />
                      :null))
                      }
                  </Flex.Item>

              ))}
          </Flex>
          ))}
      </List>