这一节主要是介绍react-navigation的StackNavigator，我当前使用的版本是1.0.0-beta.11，与之前的语法较有不同。
安装以及相关问题
首先要想使用react-navigation，需要先进行安装：
npm install --save react-navigation
问题一
有时候在安装完，会出现react不能使用的情况，需要重新安装一下react
npm install -g yarn react-native-cli
问题二
如果报出以下问题：
可以替换下版本：
yarn add react@16.0.0-alpha.12
问题三
如果 'React/RCTBundleURLProvider.h' file not found
左侧点击跟项目目录 -> 选择右侧 Build Settings -> 选择 All & Combined -> 搜索框输入 Always Search User Paths -> 将 Always Search User Paths 设置为 Yes -> Clean -> Build
使用
在开始介绍之前先放一个首页的图：
现在放一下代码：
import React from 'react';
import {
AppRegistry,
StyleSheet,
Text,View,Button,
} from 'react-native';
import { StackNavigator } from 'react-navigation';
import Detail from './Detail';
import UserCenter from './UserCenter';
class HomeScreen extends React.Component {
static navigationOptions = ({navigation}) => {
return{
title:'我的产品',
headerTitleStyle:{
alignSelf:'center',
color: '#388e3c'
},
backTitle: '返回', // 左上角返回键文字
style: {
backgroundColor: '#0d47a1'
},
titleStyle: {
color: '#388e3c'
},
headerRight: (
<Button
title="个人中心"
onPress={() => navigation.navigate('UserCenter',{user:'我的App'})}
/>
),
cardStack: {
gesturesEnabled: true
},
}
};
render() {
const { navigate } = this.props.navigation;
return (
<View>
<Text>搜索</Text>
<Button
onPress={() => navigate('DetailPage',{user:'我的App'})}
title="我的App"/>
</View>
);
}
}
const styles = StyleSheet.create({
RightButton: {
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
marginRight:10
},
});
const SimpleApp = StackNavigator({
Home: {screen: HomeScreen},
UserCenter: {screen: UserCenter},
DetailPage:{screen:Detail}
}, {
initialRouteName: 'Home', // 默认显示界面
mode: 'card', // 页面切换模式, 左右是card(相当于iOS中的push效果), 上下是modal(相当于iOS中的modal效果)
headerMode: 'screen', // 导航栏的显示模式, screen: 有渐变透明效果, float: 无透明效果, none: 隐藏导航栏
onTransitionStart: ()=>{ console.log('导航栏切换开始'); }, // 回调
onTransitionEnd: ()=>{ console.log('导航栏切换结束'); } // 回调
});
export default SimpleApp;
首先需要介绍的是设置可跳转的界面，在这里我们主要有三个Home,UserCenter,DetailPage每个界面对应了一个js文件，需要提前import进来。
但需要跳转的时候，只要找到this.props.navigation，执行跳转方法即可navigate('DetailPage',{user:'我的App'})
其中DetailPage是对应的界面，后面是可以传递过去的数据，没有数据也可以不用传递。
在这里需要重点介绍的是navigationOptions，这个的设置有两种写法，一种比较简单，不需要传参进来：
static navigationOptions = {
title:'我的产品',
headerTitleStyle:{
alignSelf:'center',
color: '#388e3c'
},
};
但是由于，我们可能会在左右按钮的时候设置一些跳转，这时就需要navigation，那么这是可以这样写：
static navigationOptions = ({navigation}) => {
return{
title:'我的产品',
headerTitleStyle:{
alignSelf:'center',
color: '#388e3c'
},
backTitle: '返回', // 左上角返回键文字
style: {
backgroundColor: '#0d47a1'
},
titleStyle: {
color: '#388e3c'
},
headerRight: (
<Button
title="个人中心"
onPress={() => navigation.navigate('UserCenter',{user:'我的App'})}
/>
),
cardStack: {
gesturesEnabled: true
},
}
};
再看一下另一个界面怎么写的（UserCenter）：
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View
} from 'react-native';
export default class UserCenter extends Component {
render() {
return (
<View style={styles.container}>
<Text style={styles.welcome}>
这里是用户中心!
</Text>
<Text style={styles.instructions}>
但是还没有内容
</Text>
<Text style={styles.instructions}>
因为,{'\n'}
没有登录接口
</Text>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});
接口属性
对于StackNavigatorConfig的一些接口，主要分为两部分，一部分是StackNavigatorConfig，一部分是Screen Navigation Options
StackNavigatorConfig
StackNavigatorConfig也就是需要在const SimpleApp = StackNavigator(screen,StackNavigatorConfig);中设置的：
Options for the router:
- initialRouteName - Sets the default screen of the stack. Must match one of the keys in route configs.
- initialRouteParams - The params for the initial route
- navigationOptions - Default navigation options to use for screens
- paths - A mapping of overrides for the paths set in the route configs
Visual options:
-
mode - Defines the style for rendering and transitions:
card - Use the standard iOS and Android screen transitions. This is the default. modal - Make the screens slide in from the bottom which is a common iOS pattern. Only works on iOS, has no effect on Android. -
headerMode - Specifies how the header should be rendered:
float - Render a single header that stays at the top and animates as screens are changed. This is a common pattern on iOS. screen - Each screen has a header attached to it and the header fades in and out together with the screen. This is a common pattern on Android. none - No header will be rendered. cardStyle - Use this prop to override or extend the default style for an individual card in stack.
transitionConfig - Function to return an object that overrides default screen transitions.
onTransitionStart - Function to be invoked when the card transition animation is about to start.
onTransitionEnd - Function to be invoked once the card transition animation completes.
Screen Navigation Options
- title
String that can be used as a fallback for headerTitle and tabBarLabel - header
React Element or a function that given HeaderProps returns a React Element, to display as a header. Setting to null hides header. - headerTitle
String or React Element used by the header. Defaults to scene title - headerBackTitle
Title string used by the back button on iOS or null to disable label. Defaults to scene title - headerTruncatedBackTitle
Title string used by the back button when headerBackTitle doesn't fit on the screen. "Back" by default. - headerRight
React Element to display on the right side of the header - headerLeft
React Element to display on the left side of the header - headerStyle
Style object for the header - headerTitleStyle
Style object for the title component - headerBackTitleStyle
Style object for the back title - headerTintColor
Tint color for the header - headerPressColorAndroid
Color for material ripple (Android >= 5.0 only) - gesturesEnabled
Whether you can use gestures to dismiss this screen. Defaults to true on iOS, false on Android.
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