the page will shake when scroll

[lishoulong]

Hi, My RN version is 0.51.0,react 16.0.0.
My scene is rending a list, when scroll up or down , the contents will shake. Or when scroll up, the content deny to scroll up.

Looking forward for your reply.

[lishoulong]

@cesardeazevedo , Have you encounter this problem.

[cesardeazevedo]

Hi, thanks for report,

I haven't face this yet, this component is too generic, and i still don't know how people are actually using it.

If you can give a example project that i could test, i might can take a look.

[lishoulong]

ok, I currently use my inner api, I will reshow this problem for a moment.

[dviluk]

(weeb here)

Thank you for your work!

Yeah, i have a similar problem. When i scroll up or down some times snag (edit: i think the word is snap) to the bottom.

As you can see i cant scroll up in the picture after a few tries.

    <Screen nested>
        <Header
            imageSize={[260, 370]}
            title={title}
            cover={cover}
            type={type}
            status={status}
        />
        <Tabs //react-native-scrollable-tab-view -- also tested without this
            style={{ height: this.state.tabsHeight }}
        >
            <Screen nested
                tabLabel={'INFO'}
            >
                <Text light center>
                    {here_the_long_text}
                </Text>
            </Screen>
        </Tabs>
    </Screen>

package.json

{
  "dependencies": {
    "react": "16.3.0-alpha.1",
    "react-native": "0.54.0",
    "react-native-collapsing-toolbar": "^1.0.0-beta.8",
    "react-native-device-info": "^0.17.3",
    "react-native-navigation": "^1.1.375",
    "react-native-nested-scroll-view": "^6.0.1",
    "react-native-platform-touchable": "^1.1.1",
    "react-native-scrollable-tab-view": "^0.8.0"
  },
  "devDependencies": {
    "babel-jest": "22.2.2",
    "babel-preset-react-native": "4.0.0",
    "flow-bin": "0.65.0",
    "jest": "22.2.2",
    "react-test-renderer": "16.2.0"
  },
  "jest": {
    "preset": "react-native"
  }
}

Same happened with react-native-collapsing-toolbar demo if you put some content.

import {
  AppBarLayout,
  CoordinatorLayout,
  CollapsingToolbarLayout,
  CollapsingParallax,
} from 'react-native-collapsing-toolbar'

import NestedScrollView from 'react-native-nested-scroll-view'


render() {
  const HEADER_HEIGHT = 300
  return (
    <CoordinatorLayout>
      <AppBarLayout style={{height: HEADER_HEIGHT, backgroundColor: '#000'}}>
        <CollapsingToolbarLayout
          title='Collapsing Toolbar'
          contentScrimColor='#673AB7'
          expandedTitleColor='#ffffff'
          expandedTitleGravity='BOTTOM'
          scrimAnimationDuration={500}
          expandedTitleMarginStart={22}
          expandedTitleMarginBottom={22}
          scrollFlags={
              AppBarLayout.SCROLL_FLAG_SCROLL
            | AppBarLayout.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED
            | AppBarLayout.SCROLL_FLAG_SNAP
          }>
          <CollapsingParallax parallaxMultiplier={0.6}>
            <View collapsable={false} style={{height: HEADER_HEIGHT, justifyContent: 'center' }}>
              <Text>Some Custom Text Inside the Parallax</Text>
            </View>
          </CollapsingParallax>
          <ToolbarAndroid actions={[{title: 'Settings'}]} />
        </CollapsingToolbarLayout>
      </AppBarLayout>
      <NestedScrollView>
      // Main Content
      </NestedScrollView>
    </CoordinatorLayout>
  )
}

[dviluk]

Hi cesar!
After reading the files in this repository, I could find a message in the file ReactNesetdScrollView.java

Log.w(
          ReactConstants.TAG,
          "Failed to get mScroller field for ScrollView! " +
            "This app will exhibit the bounce-back scrolling bug :("
);

I Googled the message and I found this issue #6

@kfrozen says that he fixed that bug by calling super.fling(velocityY); inside the fling function. After that change the bug disappeared!

Yay!