react-native/docs/viewpagerandroid.md
Héctor Ramos 64d80b13db Migrate to new documentation format
Summary:
Now that the Component and API docs are no longer auto-generated, we need to consolidate on a new format for our jsdoc comments. Any help from the community will be appreciated.

In this initial pull request, we'll be tackling the following docs:

- `AccessibilityInfo`, an API doc.
- `ActivityIndicator`, a Component doc.
- `View`, a Component doc.

This top comment will serve as a style guide, and when in doubt, please refer to the individual commits in this PR.

Each commit should update a single component or API, along with any relevant markdown files.

- Documentation in the JavaScript source files should be succinct. Any verbosity should be moved over to the markdown docs in the website...
- ...by adding a link to the relevant method/prop on the website to every comment block.
- Avoid markdown style links in JavaScript source files, opt for plain old URIs.

Let code document itself:

- If a method is Flow typed, the comment block does not need to repeat this information.
- If a param can be one of several values, and the type definition is easily determined from the code, the values should not be repeated in the comment block. Again, move this to the markdown doc if not present already.
Closes https://github.com/facebook/react-native/pull/16790

Differential Revision: D6353840

Pulled By: hramos

fbshipit-source-id: 9712c459acc33092aae9909f3dd0b58a00b26afc
2017-11-16 17:04:45 -08:00

4.2 KiB

id title layout category permalink next previous
viewpagerandroid ViewPagerAndroid docs components docs/viewpagerandroid.html virtualizedlist view

Container that allows to flip left and right between child views. Each child view of the ViewPagerAndroid will be treated as a separate page and will be stretched to fill the ViewPagerAndroid.

It is important all children are <View>s and not composite components. You can set style properties like padding or backgroundColor for each child. It is also important that each child have a key prop.

Example:

render: function() {
  return (
    <ViewPagerAndroid
      style={styles.viewPager}
      initialPage={0}>
      <View style={styles.pageStyle} key="1">
        <Text>First page</Text>
      </View>
      <View style={styles.pageStyle} key="2">
        <Text>Second page</Text>
      </View>
    </ViewPagerAndroid>
  );
}

...

var styles = {
  ...
  viewPager: {
    flex: 1
  },
  pageStyle: {
    alignItems: 'center',
    padding: 20,
  }
}

Props

Type Definitions


Reference

Props

initialPage

Index of initial page that should be selected. Use setPage method to update the page, and onPageSelected to monitor page changes

Type Required
number No

keyboardDismissMode

Determines whether the keyboard gets dismissed in response to a drag.

  • 'none' (the default), drags do not dismiss the keyboard.
  • 'on-drag', the keyboard is dismissed when a drag begins.
Type Required
enum('none', 'on-drag') No

onPageScroll

Executed when transitioning between pages (ether because of animation for the requested page change or when user is swiping/dragging between pages) The event.nativeEvent object for this callback will carry following data:

  • position - index of first page from the left that is currently visible
  • offset - value from range [0,1) describing stage between page transitions. Value x means that (1 - x) fraction of the page at "position" index is visible, and x fraction of the next page is visible.
Type Required
function No

onPageScrollStateChanged

Function called when the page scrolling state has changed. The page scrolling state can be in 3 states:

  • idle, meaning there is no interaction with the page scroller happening at the time
  • dragging, meaning there is currently an interaction with the page scroller
  • settling, meaning that there was an interaction with the page scroller, and the page scroller is now finishing it's closing or opening animation
Type Required
function No

onPageSelected

This callback will be called once ViewPager finish navigating to selected page (when user swipes between pages). The event.nativeEvent object passed to this callback will have following fields:

  • position - index of page that has been selected
Type Required
function No

pageMargin

Blank space to show between pages. This is only visible while scrolling, pages are still edge-to-edge.

Type Required
number No

peekEnabled

Whether enable showing peekFraction or not. If this is true, the preview of last and next page will show in current screen. Defaults to false.

Type Required
bool No

scrollEnabled

When false, the content does not scroll. The default value is true.

Type Required
bool No

Type Definitions

ViewPagerScrollState

Type
$Enum

Constants:

Value Description
idle
dragging
settling