react-native-navigation的迁移库

Adding buttons to the navigator

Nav bar buttons can be defined per-screen by adding static navigatorButtons = {...}; on the screen component definition. This object can also be passed when the screen is originally created; and can be overridden when a screen is pushed. Handle onPress events for the buttons by setting your handler with navigator.setOnNavigatorEvent(callback).

class FirstTabScreen extends Component {
  static navigatorButtons = {
    rightButtons: [
      {
        title: 'Edit', // for a textual button, provide the button title (label)
        id: 'edit', // id for this button, given in onNavigatorEvent(event) to help understand which button was clicked
        testID: 'e2e_rules', // optional, used to locate this view in end-to-end tests
        disabled: true, // optional, used to disable the button (appears faded and doesn't interact)
        disableIconTint: true, // optional, by default the image colors are overridden and tinted to navBarButtonColor, set to true to keep the original image colors
        showAsAction: 'ifRoom', // optional, Android only. Control how the button is displayed in the Toolbar. Accepted valued: 'ifRoom' (default) - Show this item as a button in an Action Bar if the system decides there is room for it. 'always' - Always show this item as a button in an Action Bar. 'withText' - When this item is in the action bar, always show it with a text label even if it also has an icon specified. 'never' - Never show this item as a button in an Action Bar.
        buttonColor: 'blue', // Optional, iOS only. Set color for the button (can also be used in setButtons function to set different button style programatically)
        buttonFontSize: 14, // Set font size for the button (can also be used in setButtons function to set different button style programatically)
        buttonFontWeight: '600', // Set font weight for the button (can also be used in setButtons function to set different button style programatically)
      },
      {
        icon: require('../../img/navicon_add.png'), // for icon button, provide the local image asset name
        id: 'add' // id for this button, given in onNavigatorEvent(event) to help understand which button was clicked
      }
    ]
  };

  constructor(props) {
    super(props);
    // if you want to listen on navigator events, set this up
    this.props.navigator.setOnNavigatorEvent(this.onNavigatorEvent.bind(this));
  }

  onNavigatorEvent(event) { // this is the onPress handler for the two buttons together
    if (event.type == 'NavBarButtonPress') { // this is the event type for button presses
      if (event.id == 'edit') { // this is the same id field from the static navigatorButtons definition
        AlertIOS.alert('NavBar', 'Edit button pressed');
      }
      if (event.id == 'add') {
        AlertIOS.alert('NavBar', 'Add button pressed');
      }
    }
  }

  render() {
    return (
      <View style={{flex: 1}}>...</View>
     );
  }

Buttons object format

{
  rightButtons: [{ // buttons for the right side of the nav bar (optional)
    title: 'Edit', // if you want a textual button
    icon: require('../../img/navicon_edit.png'), // if you want an image button
    component: 'example.CustomButton', // if you want a custom button
    passProps: {}, // Object that will be passed as props to custom components (optional)
    id: 'compose', // id of the button which will pass to your press event handler. See the section bellow for Android specific button ids
    testID: 'e2e_is_awesome', // if you have e2e tests, use this to find your button
    disabled: true, // optional, used to disable the button (appears faded and doesn't interact)
    disableIconTint: true, // optional, by default the image colors are overridden and tinted to navBarButtonColor, set to true to keep the original image colors
    buttonColor: 'blue', // Set color for the button (can also be used in setButtons function to set different button style programatically)
    buttonFontSize: 14, // Set font size for the button (can also be used in setButtons function to set different button style programatically)
    buttonFontWeight: '600' // Set font weight for the button (can also be used in setButtons function to set different button style programatically)
    systemItem: 'compose', // Optional, iOS only. Set a system bar button item as the icon. Matches UIBarButtonSystemItem naming.
  }],
  leftButtons: [] // buttons for the left side of the nav bar (optional)
}

iOS System Items

On iOS, UIKit supplies some common bar button glyphs for developers to use. The following values can be supplied as values to to systemItem to use them as an icon for your button.

done
cancel
edit
save
add
flexibleSpace
fixedSpace
compose
reply
action
organize
bookmarks
search
refresh
stop
camera
trash
play
pause
rewind
fastForward
undo
redo

More information about these glyphs can be found in Apple’s Human Interface Guidelines.

Android left button

On Android, four button types are supported by default without the need to provide an icon. You can use them by specifying one of the following ids in your left button definition:

back
cancel
accept
sideMenu

Custom Navigation Buttons

On iOS, react-native-navigation uses UIBarButtonItem to display all items in the navigation bar. Instead of using images or text for normal UIBarButtonItems, you can supply a custom component to be displayed within a custom view of a UIBarButtonItem, using the component property when specifying a navigation button.

Custom components must first be registered, just as screens are registered, using Navigation.registerComponent.

Additionally, ensure that the view is able to size itself, as custom navigation buttons will size depending on their content. Only width will be respected by the navigation bar; views can overflow outside of the navigation bar if they are too tall.

const styles = StyleSheet.create({
  button: {
    overflow: 'hidden',
    width: 34,
    height: 34,
    borderRadius: 34 / 2,
    justifyContent: 'center',
    alignItems: 'center',
  },
});

// Our custom component we want as a button in the nav bar
const CustomButton = ({ text }) =>
  <TouchableOpacity
    style={[styles.button, { backgroundColor: 'tomato' }]}
    onPress={() => console.log('pressed me!')}
  >
    <View style={styles.button}>
      <Text style={{ color: 'white' }}>
        {text}
      </Text>
    </View>
  </TouchableOpacity>;

// Register the component
Navigation.registerComponent('CustomButton', () => CustomButton);

Navigation.startSingleScreenApp({
  screen: {
    screen: 'example.screen',
    title: 'React Native Navigation',
    navigatorButtons: {
      leftButtons: [
        {
          id: 'custom-button',
          component: 'CustomButton', // This line loads our component as a nav bar button item
          passProps: {
            text: 'Hi!',
          },
        },
      ],
    },
  },
});

Floating Action Button (FAB) - Android only

Each screen can contain a single Fab which is displayed at the bottom right corner of the screen.

Simple Fab:

  static navigatorButtons = {
    fab: {
      collapsedId: 'share',
      collapsedIcon: require('../../img/ic_share.png'),
      collapsedIconColor: 'red', // optional
      backgroundColor: '#607D8B'
    }
  };

Fab with expanded state Example

    fab: {
      collapsedId: 'share',
      collapsedIcon: require('../../img/ic_share.png'),
      collapsedIconColor: 'green', // optional
      expendedId: 'clear',
      expendedIcon: require('../../img/ic_clear.png'),
      expendedIconColor: 'red', // optional
      backgroundColor: '#3F51B5',
      actions: [
        {
          id: 'mail',
          icon: require('../../img/ic_mail.png'),
          iconColor: 'blue', // optional
          backgroundColor: '#03A9F4'
        },
        {
          id: 'twitter',
          icon: require('../../img/ic_twitter.png'),
          backgroundColor: '#4CAF50'
        }
      ]
    }

Contextual TopBar Menu - Android only

A contextual menu offers actions that affect a specific item or context frame in the UI. You can provide a context menu for any view, but they are most often used for items in a ListView, GridView, or other view collections in which the user can perform direct actions on each item. (Taken from the Android documentation)

showing the contextual menu

this.props.navigator.showContextualMenu(
  {
    rightButtons: [
      {
        title: 'Add',
        icon: require('../img/add.png')
      },
      {
        title: 'Delete',
        icon: require('../img/delete.png')
      }
    ],
    onButtonPressed: (index) => console.log(`Button ${index} tapped`)
  }
);

Hiding the contextual menu

this.props.navigator.dismissContextualMenu();

To style the ContextualMenu, use the following properties in the screen’s navigatorStyle:

static navigatorStyle = {
  contextualMenuStatusBarColor: '#0092d1',
  contextualMenuBackgroundColor: '#00adf5',
  contextualMenuButtonsColor: '#ffffff'
};

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