[SectionList][inverted] SectionList headers are sticky-at-the-top-footers if the list is inverted

[terrysahaidak]

• I have reviewed the documentation
• I have searched existing issues
• I am using the latest React Native version

Environment

Environment:
OS: macOS High Sierra 10.13.1
Node: 8.6.0
Yarn: 1.5.1
npm: 4.6.1
Watchman: 4.9.0
Xcode: Xcode 9.0.1 Build version 9A1004
Android Studio: Not Found

Packages: (wanted => installed)
react: 16.3.1 => 16.3.1
react-native: 0.55.3 => 0.55.3

Steps to Reproduce

Clone this repository and run it via react-native run-ios.
Observe the section separators are in wrong (randomly?) places.

Expected Behavior

The section list headers should be in the top of the section instead of the bottom like section footers do with an inverted list (but they aren't sticky).

Expected gif:

Actual Behavior

The section headers are footers instead of headers. They are sticky because of #17762 but still footers, not headers.

Sample code:

export default class App extends React.Component {
  render() {
    return (
      <View style={s.container}>
        <SectionList
          inverted
          sections={mock.sections}
          maxToRenderPerBatch={10}
          initialNumToRender={10}
          style={{ flex: 1 }}
          keyExtractor={(item) => item.messageId}
          renderSectionHeader={sectionProps => (
            <SectionHeader
              {...sectionProps}
            />
          )}
          renderItem={({ item }) => (
            <ListItem
              item={item}
            />
          )}
          ItemSeparatorComponent={ItemSeparator}
        />
        />
      </View>
    );
  }
}

Problem Gif:

[almorak]

try:
set sectionlist stickySectionHeadersEnabled={false}
use renderSectionFooter instead of renderSectionHeader with inverted case

[terrysahaidak]

@almorak thanks for your advice, but it won't fix the bug at all.
Sticky headers are common behavior for chat date headers, I still need them.

Also, see my second issue:
#18943

[terrysahaidak]

Hi @janicduplessis, you have worked on support of inverted sticky headers, but there are some issues, could you please look at them?

[stale]

Hey there, it looks like there has been no activity on this issue recently. Has the issue been fixed, or does it still require the community's attention? This issue may be closed if no further activity occurs. You may also label this issue as "For Discussion" or "Good first issue" and I will leave it open. Thank you for your contributions.

[terrysahaidak]

Still there is no any workaround or fix for that, so it can't be closed.

[iamolegga]

Any workaround on this?

[terrysahaidak]

@iamolegga I just don't use section list with sticky headers currently. Just simply FlatList with custom functions for creating sections and then render it.

[brunoro]

Also struggling with this here, I'm implementing infinite scroll to the top and need sticky headers (or inverted footers, apparently). Any solutions so far?