平面列表-使用keyExtractor获取和更改数据

Question

我想用keyExtractor更改FlatListİtem。

例如； this.MyFlatlist.keyExtractor [12] .username =“ Emre”

<FlatList
            ref={(list) => this.myFlatList = list}           
            data={this.state.userlist}
            renderItem={({item, separators})=>(
              <View /><Text>{item.username}</Text></View> 
            )}
            removeClippedSubviews={true} 
            refreshing={this.state.refreshing} 
            keyExtractor={(item, index) => item.userID.toString()} 
            onRefresh={this.handleRefresh}  
            extraData={this.state}   
            />