Update title & opacity of title+navbar

- Change title to accept string/component
- Added `alwaysShowTitle` & `alwaysShowNavBar` property
- Added status bar to display same color as navBarColor
- Change default `extraScrollHeight` to 30
- Change default `headerMaxHeight` to 170

Author: kyaroru

README.md

@@ -15,25 +15,26 @@
 $ npm i react-native-parallax-header --save
 ```
 ## Demo
+### iPhone X or XS (Using `alwaysShowTitle={false}` & `alwaysShowNavBar={false}`)
+![iPhone X](https://i.gyazo.com/24343e2127b8e479a52f4bc5853ef457.gif)
+
 ### iPhone X or XS
-![iPhone X (Image)](http://g.recordit.co/iWW0MOia6i.gif)
-![iPhone X (Color)](http://g.recordit.co/vDfanKwzy0.gif)
+![iPhone X](https://i.gyazo.com/b24881b191ce5a69e7de14b7d0bb688e.gif)
 
 ### iPhone 8
-![iPhone 8 (Image)](http://g.recordit.co/g7zcxrsKD6.gif)
-![iPhone 8 (Color)](http://g.recordit.co/3JYXSvjFAM.gif)
+![iPhone 8](https://i.gyazo.com/eebeff28c7df7b0233fabb9cf2a9c5dc.gif)
 
 ## Example
 ```jsx
 import Icon from 'react-native-vector-icons/MaterialIcons';
 import ReactNativeParallaxHeader from 'react-native-parallax-header';
 
-const IS_IPHONE_X = SCREEN_HEIGHT === || SCREEN_HEIGHT === 896;
+const IS_IPHONE_X = SCREEN_HEIGHT === 812 || SCREEN_HEIGHT === 896;
 const STATUS_BAR_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 44 : 20) : 0;
-const HEADER_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 88 : 64) : 45;
+const HEADER_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 88 : 64) : 64;
 const NAV_BAR_HEIGHT = HEADER_HEIGHT - STATUS_BAR_HEIGHT;
 
-const viewImages = {
+const images = {
   background: require('../../../img/test.jpg'),
 };
 
@@ -53,12 +54,6 @@ const styles = StyleSheet.create({
     flexDirection: 'row',
     backgroundColor: Colors.transparent,
   },
-  innerContainer: {
-    flex: 1,
-    justifyContent: 'center',
-    alignItems: 'center',
-    margin: 10,
-  },
   titleStyle: {
     color: Colors.white,
     fontWeight: 'bold',
@@ -90,7 +85,7 @@ render() {
         navbarColor={Colors.primary}
         title="Parallax Header ~"
         titleStyle={styles.titleStyle}
-        backgroundImage={viewImages.background}
+        backgroundImage={images.background}
         backgroundImageScale={1.2}
         renderNavBar={this.renderNavBar}
         renderContent={this.renderContent}
@@ -107,15 +102,17 @@ render() {
 | -------- | ---- | -------- | ----------- | ------- |
 | `renderNavBar` | `func` | No | This renders the nav bar component | Empty `<View />` |
 | `renderContent` | `func` | **YES** | This renders the scroll view content | - |
-| `headerMaxHeight` | `number` | No | This is the header maximum height | Default to `200` |
+| `headerMaxHeight` | `number` | No | This is the header maximum height | Default to `170` |
 | `headerMinHeight` | `number` | No | This is the header minimum height | Default to common ios & android navbar height (have support for iPhone X too :p) |
 | `backgroundImage` | `image source` | No | This renders the background image of the header (**if specified, background color will not take effect**) | Default is `null` |
 | `backgroundImageScale` | `number` | No | This is the image scale - either enlarge or shrink (after scrolling to bottom & exceed the headerMaxHeight) | Default is `1.5` |
 | `backgroundColor` | `string` | No | This is the color of the parallax background (before scrolling up), **will not be used if `backgroundImage` is specified** | Default color is `#303F9F` |
-| `extraScrollHeight` | `number` | No | This is the extra scroll height (after scrolling to bottom & exceed the headerMaxHeight) | Default is `50` |
+| `extraScrollHeight` | `number` | No | This is the extra scroll height (after scrolling to bottom & exceed the headerMaxHeight) | Default is `30` |
 | `navbarColor` | `string` | No | This is the background color of the navbar (after scroll up) | Default color is `#3498db` |
-| `title` | `string` | No | This is the title to be display in the header | Default is empty string `‘’` |
+| `title` | `any` | No | This is the title to be display in the header, can be string or component | Default to null |
 | `titleStyle` | `style` | No | This is the title style to override default font size/color | Default to `color: ‘white’ `text and `fontSize: 16` |
 | `scrollEventThrottle` | `number` | No | This is the scroll event throttle | Default is `16` |
 | `contentContainerStyle` | `style` | No | This is the contentContainerStyle style to override default `<ScrollView>` contentContainerStyle style | Default to null |
 | `contentStyle` | `style` | No | This is the inner content style to override default `<View>` style inside `<ScrollView>` component | Default to null |
+| `alwaysShowTitle` | `bool` | No | This is to determine whether show or hide the title after scroll | Default to `true` |
+| `alwaysShowNavBar` | `bool` | No | This is to determine whether show or hide the navBar before scroll | Default to `true` |

index.js

@@ -7,6 +7,7 @@ import {
   Text,
   View,
   Dimensions,
+  StatusBar,
 } from 'react-native';
 
 const {
@@ -15,12 +16,12 @@ const {
 
 const IS_IPHONE_X = SCREEN_HEIGHT === 812 || SCREEN_HEIGHT === 896;
 const STATUS_BAR_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 44 : 20) : 0;
-const NAV_BAR_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 88 : 64) : 45;
+const NAV_BAR_HEIGHT = Platform.OS === 'ios' ? (IS_IPHONE_X ? 88 : 64) : 64;
 
 const SCROLL_EVENT_THROTTLE = 16;
-const DEFAULT_HEADER_MAX_HEIGHT = 200;
+const DEFAULT_HEADER_MAX_HEIGHT = 170;
 const DEFAULT_HEADER_MIN_HEIGHT = NAV_BAR_HEIGHT;
-const DEFAULT_EXTRA_SCROLL_HEIGHT = 50;
+const DEFAULT_EXTRA_SCROLL_HEIGHT = 30;
 const DEFAULT_BACKGROUND_IMAGE_SCALE = 1.5;
 
 const DEFAULT_NAVBAR_COLOR = '#3498db';
@@ -114,91 +115,77 @@ class RNParallax extends Component {
   }
 
   getHeaderHeight() {
-    return this.state.scrollY.interpolate({
+    const { scrollY } = this.state;
+    return scrollY.interpolate({
       inputRange: this.getInputRange(),
       outputRange: [this.getHeaderMaxHeight() + this.getExtraScrollHeight(), this.getHeaderMaxHeight(), this.getHeaderMinHeight()],
       extrapolate: 'clamp',
     });
   }
 
   getNavBarOpacity() {
-    return this.state.scrollY.interpolate({
+    const { scrollY } = this.state;
+    return scrollY.interpolate({
       inputRange: this.getInputRange(),
       outputRange: [0, 1, 1],
       extrapolate: 'clamp',
     });
   }
 
+  getNavBarForegroundOpacity() {
+    const { scrollY } = this.state;
+    const { alwaysShowNavBar } = this.props;
+    return scrollY.interpolate({
+      inputRange: this.getInputRange(),
+      outputRange: [alwaysShowNavBar ? 1 : 0, alwaysShowNavBar ? 1 : 0, 1],
+      extrapolate: 'clamp',
+    });
+  }
+
   getImageOpacity() {
-    return this.state.scrollY.interpolate({
+    const { scrollY } = this.state;
+    return scrollY.interpolate({
       inputRange: this.getInputRange(),
       outputRange: [1, 1, 0],
       extrapolate: 'clamp',
     });
   }
 
   getImageTranslate() {
-    return this.state.scrollY.interpolate({
+    const { scrollY } = this.state;
+    return scrollY.interpolate({
       inputRange: this.getInputRange(),
       outputRange: [0, 0, -50],
       extrapolate: 'clamp',
     });
   }
 
   getImageScale() {
-    return this.state.scrollY.interpolate({
+    const { scrollY } = this.state;
+    return scrollY.interpolate({
       inputRange: this.getInputRange(),
       outputRange: [this.getBackgroundImageScale(), 1, 1],
       extrapolate: 'clamp',
     });
   }
 
-  getTitleTranslate() {
-    return this.state.scrollY.interpolate({
+  getTitleTranslateY() {
+    const { scrollY } = this.state;
+    return scrollY.interpolate({
       inputRange: this.getInputRange(),
       outputRange: [5, 0, 0],
       extrapolate: 'clamp',
     });
   }
 
-  renderHeaderTitle() {
-    const { title, titleStyle } = this.props;
-    const titleTranslate = this.getTitleTranslate();
-
-    return (
-      <Animated.View
-        style={[
-          styles.headerTitle,
-          {
-            transform: [
-              { translateY: titleTranslate },
-            ],
-            height: this.getHeaderHeight(),
-          },
-        ]}
-      >
-        <Text style={[styles.headerText, titleStyle]}>
-          {title}
-        </Text>
-      </Animated.View>
-    );
-  }
-
-  renderHeaderForeground() {
-    const { renderNavBar } = this.props;
-
-    return (
-      <Animated.View
-        style={[
-          styles.bar,
-          {
-            height: this.getHeaderMinHeight(),
-          },
-        ]}
-      >
-        {renderNavBar()}
-      </Animated.View>
-    );
+  getTitleOpacity() {
+    const { scrollY } = this.state;
+    const { alwaysShowTitle } = this.props;
+    return scrollY.interpolate({
+      inputRange: this.getInputRange(),
+      outputRange: [1, 1, alwaysShowTitle ? 1 : 0],
+      extrapolate: 'clamp',
+    });
   }
 
   renderBackgroundImage() {
@@ -280,15 +267,66 @@ class RNParallax extends Component {
     );
   }
 
-  renderScrollView() {
-    const { renderContent, scrollEventThrottle, contentContainerStyle, containerStyle } = this.props;
+  renderHeaderTitle() {
+    const { title, titleStyle } = this.props;
+    const titleTranslateY = this.getTitleTranslateY();
+    const titleOpacity = this.getTitleOpacity();
 
+    return (
+      <Animated.View
+        style={[
+          styles.headerTitle,
+          {
+            transform: [
+              { translateY: titleTranslateY },
+            ],
+            height: this.getHeaderHeight(),
+            opacity: titleOpacity,
+          },
+        ]}
+      >
+        {typeof title === 'string'
+          && (
+            <Text style={[styles.headerText, titleStyle]}>
+              {title}
+            </Text>
+          )
+        }
+        {typeof title !== 'string' && title}
+      </Animated.View>
+    );
+  }
+
+  renderHeaderForeground() {
+    const { renderNavBar } = this.props;
+    const navBarOpacity = this.getNavBarForegroundOpacity();
+
+    return (
+      <Animated.View
+        style={[
+          styles.bar,
+          {
+            height: this.getHeaderMinHeight(),
+            opacity: navBarOpacity,
+          },
+        ]}
+      >
+        {renderNavBar()}
+      </Animated.View>
+    );
+  }
+
+  renderScrollView() {
+    const {
+      renderContent, scrollEventThrottle, contentContainerStyle, containerStyle,
+    } = this.props;
+    const { scrollY } = this.state;
     return (
       <Animated.ScrollView
         style={styles.scrollView}
         scrollEventThrottle={scrollEventThrottle}
         onScroll={Animated.event(
-          [{ nativeEvent: { contentOffset: { y: this.state.scrollY } } }],
+          [{ nativeEvent: { contentOffset: { y: scrollY } } }],
         )}
         contentContainerStyle={contentContainerStyle}
       >
@@ -300,8 +338,12 @@ class RNParallax extends Component {
   }
 
   render() {
+    const { navbarColor } = this.props;
     return (
       <View style={styles.container}>
+        <StatusBar
+          backgroundColor={navbarColor}
+        />
         {this.renderScrollView()}
         {this.renderNavbarBackground()}
         {this.renderHeaderBackground()}
@@ -318,7 +360,7 @@ RNParallax.propTypes = {
   backgroundColor: PropTypes.string,
   backgroundImage: PropTypes.any,
   navbarColor: PropTypes.string,
-  title: PropTypes.string,
+  title: PropTypes.any,
   titleStyle: PropTypes.any,
   headerMaxHeight: PropTypes.number,
   headerMinHeight: PropTypes.number,
@@ -327,14 +369,16 @@ RNParallax.propTypes = {
   backgroundImageScale: PropTypes.number,
   contentContainerStyle: PropTypes.any,
   containerStyle: PropTypes.any,
+  alwaysShowTitle: PropTypes.bool,
+  alwaysShowNavBar: PropTypes.bool,
 };
 
 RNParallax.defaultProps = {
   renderNavBar: () => <View />,
   navbarColor: DEFAULT_NAVBAR_COLOR,
   backgroundColor: DEFAULT_BACKGROUND_COLOR,
   backgroundImage: null,
-  title: '',
+  title: null,
   titleStyle: styles.headerText,
   headerMaxHeight: DEFAULT_HEADER_MAX_HEIGHT,
   headerMinHeight: DEFAULT_HEADER_MIN_HEIGHT,
@@ -343,6 +387,8 @@ RNParallax.defaultProps = {
   backgroundImageScale: DEFAULT_BACKGROUND_IMAGE_SCALE,
   contentContainerStyle: null,
   containerStyle: null,
+  alwaysShowTitle: true,
+  alwaysShowNavBar: true,
 };
 
 export default RNParallax;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-parallax-header",
-  "version": "1.0.7",
+  "version": "1.1.0",
   "description": "A react native scroll view component with Parallax header :p",
   "main": "index.js",
   "scripts": {