CODEWITHSUNDEEP
react-nativereact-native-listviewreact-native-scrollview
Wonka
Wonka

Reputation: 8674

React Native - Pagination of ListViews in ScrollView?

I have 3 ListView components inside a single ScrollView component like this:

<ScrollView>
  <Header />
  <ListView onEndReached={() => alert('load more 1')}/>
  <ListView onEndReached={() => alert('load more 2')}/>
  <ListView onEndReached={() => alert('load more 3')}/>
  <Footer />
</ScrollView>

The Header component has some common content and also has 3 tabs, which trigger showing the respective ListView

The issue is any ListView with onEndReached={() => alert('load more 1')} never runs the alert, so I can never load more as I scroll down and hit the end of the listview. Remove the wrapping ScrollView and the alert runs, but the common Header doesn't scroll, since we just removed the wrapping ScrollView. The header needs to scroll with the listview, which is why I wrapped everything that needs to scroll in the ScrollView.

IMPORTANT NOTE: I can't really use ListView with renderHeader={this.header}, for this scenario. Because, even though the Header will scroll, it will rerender the common Header and the 3 tabs for each ListView each time a ListView renders, instead of once. So a new Header rerender each time for each ListView won't cut it for the app.

Looking for a solution to this problem, where the Header scrolls with the listviews and the onEndReached is triggered for the visible ListView.

Upvotes: 15

Views: 5560

Answers (3)

Julien Deniau
Julien Deniau

Reputation: 5040

You can maybe use ScrollView::onScroll but it will be a little hacky. You will need to know the size of your listviews.

Work with ListView only

Maybe the best solution will be to play with the ListView dataSource and the onEndReached function.

If you update you dataset when ListView::onEndReached is triggered, I think you can add more elements to your ListView. This way, you do not need to do hacky things with ListViews in ScrollViews.

Upvotes: 0

frank
frank

Reputation: 1342

I think you're going to have to solve this by changing the dataSource in each listView in response to what header element is selected instead of loading three different ListViews. 

getInitialState() {
    return {
        currentList: this.ds.cloneWithRowsAndSections(INITIAL_DATA);
    }
},
render() {
    return <ListView renderHeader={this._renderHeader} dataSource={this.state.currentList}/>
}

The only reason you wouldn't want to do this is if you wanted to maintain the scroll position in the three sub ListViews, but that wouldn't be useful because you always have to scroll to the top to change which ListView you're looking at anyway.

Then in your _renderHeader function you would render a selector that populates currentList with different data depending on the header selected.

Upvotes: 2

while1
while1

Reputation: 3370

In styling you can set it's position as relative with top:0 and left:0 . This way it will remain static on top. 

<View>
<Header style={{position:"relative",top:0,left:0,height:30,width:Dimensions.get("window").width}} />
  <ListView />
  <ListView />
  <ListView />
 <Footer />
 </View>

Second option which may work in scrollview is to specify height for all three ListView.

Upvotes: 0

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