iOS 导航器
iOS 导航器包装了 UIKit 导航，并且允许你添加跨应用程序的 back-swipe 功能。
路线
路线是用于描述导航器每个页面的一个对象。第一个提供给 NavigatorIOS 的路线是 initialRoute：
render: function() {
return (
<NavigatorIOS
initialRoute={{
component: MyView,
title: 'My View Title',
passProps: { myProp: 'foo' },
}}
/>
);
},
现在将由导航器呈现 MyView。它将在 route 道具，导航器及所有的 passProps 指定的道具中接受一个路线对象。
路线完整的定义请看 initialRoute propType。
导航器
Navigator 是视图能够调用的导航函数的一个对象。它作为一个道具会被传递给任何由 NavigatorIOS 呈现的组件。
var MyView = React.createClass({
_handleBackButtonPress: function() {
this.props.navigator.pop();
},
_handleNextButtonPress: function() {
this.props.navigator.push(nextRoute);
},
...
});
一个导航对象包含以下功能:
push(route)——导航到一个新的路线pop()——返回一个页面popN(n)——一次返回 N 页。当 N=1 时，该行为相当于pop()replace(route)——取代当前页面的路线，并立即为新路线加载视图replacePrevious(route)——取代前一页的路线/视图replacePreviousAndPop(route)——取代了以前的路线/视图并转换回去resetTo(route)——取代顶级的项目并 popToToppopToRoute(route)——为特定的路线对象回到项目popToTop()——回到顶级项目
导航功能在 NavigatorIOS 组件中也是可用的：
var MyView = React.createClass({
_handleNavigationRequest: function() {
this.refs.nav.push(otherRoute);
},
render: () => (
<NavigatorIOS
ref="nav"
initialRoute={...}
/>
),
});
Props
initialRoute {组件：函数型，标题：字符串型，passProps：对象型，backButtonTitle：字符串型，rightButtonTitle：字符串型，onRightButtonPress：函数型，wrapperStyle：[对象型Object]}
NavigatorIOS 使用“路线”对象来识别子视图，道具，及导航栏的配置。“push”和所有其他的导航操作预计路线是这样的：
itemWrapperStyle View#style
默认的包为 navigator 中的组件设置样式。一个常见的用例是为每一页设置 backgroundColor
tintColor 字符串型
在导航栏中的按钮使用的颜色
例子
'use strict';
var React = require('react-native');
var ViewExample = require('./ViewExample');
var createExamplePage = require('./createExamplePage');
var {
PixelRatio,
ScrollView,
StyleSheet,
Text,
TouchableHighlight,
View,
} = React;
var EmptyPage = React.createClass({
render: function() {
return (
<View style={styles.emptyPage}>
<Text style={styles.emptyPageText}>
{this.props.text}
</Text>
</View>
);
},
});
var NavigatorIOSExample = React.createClass({
statics: {
title: '<NavigatorIOS>',
description: 'iOS navigation capabilities',
},
render: function() {
var recurseTitle = 'Recurse Navigation';
if (!this.props.topExampleRoute) {
recurseTitle += ' - more examples here';
}
return (
<ScrollView style={styles.list}>
<View style={styles.line}/>
<View style={styles.group}>
<View style={styles.row}>
<Text style={styles.rowNote}>
See <UIExplorerApp> for top-level usage.
</Text>
</View>
</View>
<View style={styles.line}/>
<View style={styles.groupSpace}/>
<View style={styles.line}/>
<View style={styles.group}>
{this._renderRow(recurseTitle, () => {
this.props.navigator.push({
title: NavigatorIOSExample.title,
component: NavigatorIOSExample,
backButtonTitle: 'Custom Back',
passProps: {topExampleRoute: this.props.topExampleRoute || this.props.route},
});
})}
{this._renderRow('Push View Example', () => {
this.props.navigator.push({
title: 'Very Long Custom View Example Title',
component: createExamplePage(null, ViewExample),
});
})}
{this._renderRow('Custom Right Button', () => {
this.props.navigator.push({
title: NavigatorIOSExample.title,
component: EmptyPage,
rightButtonTitle: 'Cancel',
onRightButtonPress: () => this.props.navigator.pop(),
passProps: {
text: 'This page has a right button in the nav bar',
}
});
})}
{this._renderRow('Pop', () => {
this.props.navigator.pop();
})}
{this._renderRow('Pop to top', () => {
this.props.navigator.popToTop();
})}
{this._renderRow('Replace here', () => {
var prevRoute = this.props.route;
this.props.navigator.replace({
title: 'New Navigation',
component: EmptyPage,
rightButtonTitle: 'Undo',
onRightButtonPress: () => this.props.navigator.replace(prevRoute),
passProps: {
text: 'The component is replaced, but there is currently no ' +
'way to change the right button or title of the current route',
}
});
})}
{this._renderReplacePrevious()}
{this._renderReplacePreviousAndPop()}
{this._renderPopToTopNavExample()}
</View>
<View style={styles.line}/>
</ScrollView>
);
},
_renderPopToTopNavExample: function() {
if (!this.props.topExampleRoute) {
return null;
}
return this._renderRow('Pop to top NavigatorIOSExample', () => {
this.props.navigator.popToRoute(this.props.topExampleRoute);
});
},
_renderReplacePrevious: function() {
if (!this.props.topExampleRoute) {
// this is to avoid replacing the UIExplorerList at the top of the stack
return null;
}
return this._renderRow('Replace previous', () => {
this.props.navigator.replacePrevious({
title: 'Replaced',
component: EmptyPage,
passProps: {
text: 'This is a replaced "previous" page',
},
wrapperStyle: styles.customWrapperStyle,
});
});
},
_renderReplacePreviousAndPop: function() {
if (!this.props.topExampleRoute) {
// this is to avoid replacing the UIExplorerList at the top of the stack
return null;
}
return this._renderRow('Replace previous and pop', () => {
this.props.navigator.replacePreviousAndPop({
title: 'Replaced and Popped',
component: EmptyPage,
passProps: {
text: 'This is a replaced "previous" page',
},
wrapperStyle: styles.customWrapperStyle,
});
});
},
_renderRow: function(title: string, onPress: Function) {
return (
<View>
<TouchableHighlight onPress={onPress}>
<View style={styles.row}>
<Text style={styles.rowText}>
{title}
</Text>
</View>
</TouchableHighlight>
<View style={styles.separator} />
</View>
);
},
});
var styles = StyleSheet.create({
customWrapperStyle: {
backgroundColor: '#bbdddd',
},
emptyPage: {
flex: 1,
paddingTop: 64,
},
emptyPageText: {
margin: 10,
},
list: {
backgroundColor: '#eeeeee',
marginTop: 10,
},
group: {
backgroundColor: 'white',
},
groupSpace: {
height: 15,
},
line: {
backgroundColor: '#bbbbbb',
height: 1 / PixelRatio.get(),
},
row: {
backgroundColor: 'white',
justifyContent: 'center',
paddingHorizontal: 15,
paddingVertical: 15,
},
separator: {
height: 1 / PixelRatio.get(),
backgroundColor: '#bbbbbb',
marginLeft: 15,
},
rowNote: {
fontSize: 17,
},
rowText: {
fontSize: 17,
fontWeight: '500',
},
});
module.exports = NavigatorIOSExample;