NavigationExperimental

Summary:
A new API to unify internal navigation. Also addresses a highly-rated community 'pain': https://productpains.com/post/react-native/better-navigator-api-and-docs/

Offers the following improvements:

- Redux-style navigation logic is easy to reason about
- Navigation state can be easily saved and restored through refreshes
- Declarative navigation views can be implemented in native or JS
- Animations and gestures are isolated and now use the Animated library

public

Reviewed By: hedgerwang

Differential Revision: D2798048

fb-gh-sync-id: 88027ef9ead8a80afa38354252bc377455cc6dbb

Examples/UIExplorer/NavigationExperimental/NavigationAnimatedExample.js

@@ -0,0 +1,105 @@
+/**
+ * The examples provided by Facebook are for non-commercial testing and
+ * evaluation purposes only.
+ *
+ * Facebook reserves all rights not expressly granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
+ * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+'use strict';
+
+var React = require('react-native');
+var {
+  NavigationExperimental,
+  StyleSheet,
+  ScrollView,
+} = React;
+var NavigationExampleRow = require('./NavigationExampleRow');
+var {
+  AnimatedView: NavigationAnimatedView,
+  Card: NavigationCard,
+  RootContainer: NavigationRootContainer,
+  Reducer: NavigationReducer,
+  Header: NavigationHeader,
+} = NavigationExperimental;
+
+const NavigationBasicReducer = NavigationReducer.StackReducer({
+  initialStates: [
+    {key: 'First Route'}
+  ],
+  matchAction: action => true,
+  actionStateMap: actionString => ({key: actionString}),
+});
+
+class NavigationAnimatedExample extends React.Component {
+  componentWillMount() {
+    this._renderNavigated = this._renderNavigated.bind(this);
+  }
+  render() {
+    return (
+      <NavigationRootContainer
+        reducer={NavigationBasicReducer}
+        persistenceKey="NavigationAnimatedExampleState"
+        renderNavigation={this._renderNavigated}
+      />
+    );
+  }
+  _renderNavigated(navigationState, onNavigate) {
+    if (!navigationState) {
+      return null;
+    }
+    return (
+      <NavigationAnimatedView
+        navigationState={navigationState}
+        style={styles.animatedView}
+        renderOverlay={(position, layout) => (
+          <NavigationHeader
+            navigationState={navigationState}
+            position={position}
+            getTitle={state => state.key}
+          />
+        )}
+        renderScene={(state, index, position, layout) => (
+          <NavigationCard
+            key={state.key}
+            index={index}
+            navigationState={navigationState}
+            position={position}
+            layout={layout}>
+            <ScrollView style={styles.scrollView}>
+              <NavigationExampleRow
+                text={navigationState.children[navigationState.index].key}
+              />
+              <NavigationExampleRow
+                text="Push!"
+                onPress={() => {
+                  onNavigate('Route #' + navigationState.children.length);
+                }}
+              />
+              <NavigationExampleRow
+                text="Exit Animated Nav Example"
+                onPress={this.props.onExampleExit}
+              />
+            </ScrollView>
+          </NavigationCard>
+        )}
+      />
+    );
+  }
+}
+
+const styles = StyleSheet.create({
+  animatedView: {
+    flex: 1,
+  },
+  scrollView: {
+    marginTop: 64
+  },
+});
+
+module.exports = NavigationAnimatedExample;