是的，你可以检查空数组值，并可以使用这个来渲染另一个视图

Yes, you can check empty array value and can render another view by using this

{
(this.state.dataZ.length!=0)?
 <FlatList                                   
      style={{ marginVertical: 20 }}
      numColumns={2}  
      keyExtractor={(item, index) => index}
      data={this.state.dataZ}
      renderItem = {({ item }) => {
        //  console.log("Item in RenderItem : " + typeof item)

        if(Array.isArray(this.state.dataZ)) {

          return <MonatsView
          navigate={() => this.props.navigation.navigate("Tag")}
          tag={moment(item.activitydate).format("DD-MM")}
          tagDesc={moment(item.activitydate).day()}
          phase={item.phaseid}
          time={item.time}
          zkub={item.zkub}
          />
        } 
        else {
          return console.log("DATA IS NO ARRAY????")
        }
      }
      }
    />
:
<View> .--------**write here any other view** ----- </View>
}

第 2 点:为此您可以使用:

Point 2: for this you can use:

• 使用部分列表只显示一个月的数据(https:///facebook.github.io/react-native/docs/sectionlist).

你应该根据月份来修改当前的数组对象，然后渲染一个视图并根据它进行设置.

you should modify the current array object according to months wise and render a view and set according to that.