修改了YH_ViewPager为android专用。review by yuliang。

+/**
+ * Description:
+ *
+ * Author:  Bruce.Lu
+ * Version: 1.0
+ * Created on 2017/2/23.
+ */
+import React from 'react';
+import ReactNative from 'react-native';
+
+let {
+    requireNativeComponent,
+    View,
+} = ReactNative;
+var dismissKeyboard = require('dismissKeyboard');
+
+let YH_ViewPagerView = requireNativeComponent('YH_ViewPager', null);
+
+var UIManager = require('UIManager');
+
+type Event = Object;
+var VIEWPAGER_REF = 'viewPager';
+
+export type ViewPagerScrollState = $Enum<{
+    idle: string,
+    dragging: string,
+    settling: string,
+}>;
+
+export default class YH_ViewPager extends React.Component {
+    props: {
+        initialPage?: number,
+        onPageScroll?: Function,
+        onPageScrollStateChanged?: Function,
+        onPageSelected?: Function,
+        pageMargin?: number,
+        keyboardDismissMode?: 'none' | 'on-drag',
+        scrollEnabled?: boolean,
+    };
+
+    static propTypes = {
+        ...View.propTypes,
+        initialPage: React.PropTypes.number,
+        onPageScroll: React.PropTypes.func,
+        onPageScrollStateChanged: React.PropTypes.func,
+        onPageSelected: React.PropTypes.func,
+        pageMargin: React.PropTypes.number,
+        keyboardDismissMode: React.PropTypes.oneOf([
+            'none', // default
+            'on-drag',
+        ]),
+        scrollEnabled: React.PropTypes.bool,
+    };
+
+    constructor(props) {
+        super(props);
+    }
+
+    componentDidMount() {
+        if (this.props.initialPage != null) {
+            this.setPageWithoutAnimation(this.props.initialPage);
+        }
+    }
+
+    _childrenWithOverridenStyle = (): Array => {
+        // Override styles so that each page will fill the parent. Native component
+        // will handle positioning of elements, so it's not important to offset
+        // them correctly.
+        return React.Children.map(this.props.children, function(child) {
+            if (!child) {
+                return null;
+            }
+            var newProps = {
+                ...child.props,
+                style: [child.props.style, {
+                    position: 'absolute',
+                    left: 0,
+                    top: 0,
+                    right: 0,
+                    bottom: 0,
+                    width: undefined,
+                    height: undefined,
+                }],
+                collapsable: false,
+            };
+            if (child.type &&
+                child.type.displayName &&
+                (child.type.displayName !== 'RCTView') &&
+                (child.type.displayName !== 'View')) {
+                console.warn('Each ViewPager child must be a <View>. Was ' + child.type.displayName);
+            }
+            return React.createElement(child.type, newProps);
+        });
+    };
+
+    _onPageScroll = (e: Event) => {
+        if (this.props.onPageScroll) {
+            this.props.onPageScroll(e);
+        }
+        if (this.props.keyboardDismissMode === 'on-drag') {
+            dismissKeyboard();
+        }
+    };
+
+    _onPageScrollStateChanged = (e: Event) => {
+        if (this.props.onPageScrollStateChanged) {
+            this.props.onPageScrollStateChanged(e.nativeEvent.pageScrollState);
+        }
+    };
+
+    _onPageSelected = (e: Event) => {
+        if (this.props.onPageSelected) {
+            this.props.onPageSelected(e);
+        }
+    };
+
+    setPage = (selectedPage: number) => {
+        UIManager.dispatchViewManagerCommand(
+            ReactNative.findNodeHandle(this),
+            UIManager.AndroidViewPager.Commands.setPage,
+            [selectedPage],
+        );
+    };
+
+    setPageWithoutAnimation = (selectedPage: number) => {
+        UIManager.dispatchViewManagerCommand(
+            ReactNative.findNodeHandle(this),
+            UIManager.AndroidViewPager.Commands.setPageWithoutAnimation,
+            [selectedPage],
+        );
+    };
+
+
+    render() {
+        return (<YH_ViewPagerView
+            {...this.props}
+            ref={VIEWPAGER_REF}
+            style={this.props.style}
+            onPageScroll={this._onPageScroll}
+            onPageScrollStateChanged={this._onPageScrollStateChanged}
+            onPageSelected={this._onPageSelected}
+            children={this._childrenWithOverridenStyle()}
+        />);
+    }
+}

@@ -8,138 +8,15 @@
 import React from 'react';
 import ReactNative from 'react-native';
 
-let {
-    requireNativeComponent,
-    View,
-} = ReactNative;
-var dismissKeyboard = require('dismissKeyboard');
-
-let YH_ViewPagerView = requireNativeComponent('YH_ViewPager', null);
-
-var UIManager = require('UIManager');
-
-type Event = Object;
-var VIEWPAGER_REF = 'viewPager';
-
-export type ViewPagerScrollState = $Enum<{
-    idle: string,
-    dragging: string,
-    settling: string,
-}>;
-
 export default class YH_ViewPager extends React.Component {
-    props: {
-        initialPage?: number,
-        onPageScroll?: Function,
-        onPageScrollStateChanged?: Function,
-        onPageSelected?: Function,
-        pageMargin?: number,
-        keyboardDismissMode?: 'none' | 'on-drag',
-        scrollEnabled?: boolean,
-    };
 
-    static propTypes = {
-        ...View.propTypes,
-        initialPage: React.PropTypes.number,
-        onPageScroll: React.PropTypes.func,
-        onPageScrollStateChanged: React.PropTypes.func,
-        onPageSelected: React.PropTypes.func,
-        pageMargin: React.PropTypes.number,
-        keyboardDismissMode: React.PropTypes.oneOf([
-            'none', // default
-            'on-drag',
-        ]),
-        scrollEnabled: React.PropTypes.bool,
-    };
 
     constructor(props) {
         super(props);
     }
 
-    componentDidMount() {
-        if (this.props.initialPage != null) {
-            this.setPageWithoutAnimation(this.props.initialPage);
-        }
-    }
-
-    _childrenWithOverridenStyle = (): Array => {
-        // Override styles so that each page will fill the parent. Native component
-        // will handle positioning of elements, so it's not important to offset
-        // them correctly.
-        return React.Children.map(this.props.children, function(child) {
-            if (!child) {
-                return null;
-            }
-            var newProps = {
-                ...child.props,
-                style: [child.props.style, {
-                    position: 'absolute',
-                    left: 0,
-                    top: 0,
-                    right: 0,
-                    bottom: 0,
-                    width: undefined,
-                    height: undefined,
-                }],
-                collapsable: false,
-            };
-            if (child.type &&
-                child.type.displayName &&
-                (child.type.displayName !== 'RCTView') &&
-                (child.type.displayName !== 'View')) {
-                console.warn('Each ViewPager child must be a <View>. Was ' + child.type.displayName);
-            }
-            return React.createElement(child.type, newProps);
-        });
-    };
-
-    _onPageScroll = (e: Event) => {
-        if (this.props.onPageScroll) {
-            this.props.onPageScroll(e);
-        }
-        if (this.props.keyboardDismissMode === 'on-drag') {
-            dismissKeyboard();
-        }
-    };
-
-    _onPageScrollStateChanged = (e: Event) => {
-        if (this.props.onPageScrollStateChanged) {
-            this.props.onPageScrollStateChanged(e.nativeEvent.pageScrollState);
-        }
-    };
-
-    _onPageSelected = (e: Event) => {
-        if (this.props.onPageSelected) {
-            this.props.onPageSelected(e);
-        }
-    };
-
-    setPage = (selectedPage: number) => {
-        UIManager.dispatchViewManagerCommand(
-            ReactNative.findNodeHandle(this),
-            UIManager.AndroidViewPager.Commands.setPage,
-            [selectedPage],
-        );
-    };
-
-    setPageWithoutAnimation = (selectedPage: number) => {
-        UIManager.dispatchViewManagerCommand(
-            ReactNative.findNodeHandle(this),
-            UIManager.AndroidViewPager.Commands.setPageWithoutAnimation,
-            [selectedPage],
-        );
-    };
-
 
     render() {
-        return (<YH_ViewPagerView
-            {...this.props}
-            ref={VIEWPAGER_REF}
-            style={this.props.style}
-            onPageScroll={this._onPageScroll}
-            onPageScrollStateChanged={this._onPageScrollStateChanged}
-            onPageSelected={this._onPageSelected}
-            children={this._childrenWithOverridenStyle()}
-        />);
+        return null;
     }
 }