I'm facing a problem with the SectionList component where it occasionally fails to display all sections, only rendering the first one. After some debugging, I may have found a solution, but I'm unsure why it resolves the issue.
While my page consistently displays the first section, the second section sometimes does not appear. Upon testing, I noticed that combining all items under one section ensures they display properly without any issues. This issue seems to occur specifically when there is another section containing numerous items.
The code snippet resembles the following:
const data = {
sections: [{
name: "First",
items: [{
name: "Item 1",
...
}]
},
{
name: "Second",
items: [{
name: "Item 20",
...
}]
}]
};
public render(): JSX.Element {
return (
<SafeAreaView>
<ScrollView refreshControl={this.getRefreshControl()}>
<SectionList
renderItem={({item}) => this.renderItem(item)}
renderSectionHeader={(section) => this.renderHeader(section)}
sections={this.getSections(data)}
keyExtractor={(_, index) => String(index)}
/>
</ScrollView>
</SafeAreaView>
);
}
getSections(data): SectionListData<any>[] {
const sections = data.sections.map(section => {
return {
title: section.name,
data: section.items
};
});
return sections;
}
After some experimentation, removing the ScrollView from the view hierarchy appeared to resolve the issue and I haven't been able to replicate it since. I suspect that the ScrollView might be causing conflicts with the SectionList at times, but I lack a clear understanding of why this occurs or how to validate it. Is there a way to delve deeper into this matter and comprehend why this issue arises? Has anyone else experienced similar challenges before? Your insights are much appreciated!