例子
'use strict';
var react = require('react-native');
var {
StyleSheet,
TabBarIOS,
Text,
View,
} = React;
var TabBarExample = React.createClass({
statics: {
title: '<TabBarIOS>',
description: 'Tab-based navigation.'
},
getInitialState: function() {
return {
selectedTab: 'redTab',
notifCount: 0,
presses: 0,
};
},
_renderContent: function(color: string, pageText: string) {
return (
<View style={[styles.tabContent, {backgroundColor: color}]}>
<Text style={styles.tabText}>{pageText}</Text>
<Text style={styles.tabText}>{this.state.presses} re-renders of the More tab</Text>
</View>
);
},
render: function() {
return (
<TabBarIOS>
<TabBarIOS.Item
title="Blue Tab"
selected={this.state.selectedTab === 'blueTab'}
onPress={() => {
this.setState({
selectedTab: 'blueTab',
});
}}>
{this._renderContent('#414A8C', 'Blue Tab')}
</TabBarIOS.Item>
<TabBarIOS.Item
systemIcon="history"
badge={this.state.notifCount > 0 ? this.state.notifCount : undefined}
selected={this.state.selectedTab === 'redTab'}
onPress={() => {
this.setState({
selectedTab: 'redTab',
notifCount: this.state.notifCount + 1,
});
}}>
{this._renderContent('#783E33', 'Red Tab')}
</TabBarIOS.Item>
<TabBarIOS.Item
systemIcon="more"
selected={this.state.selectedTab === 'greenTab'}
onPress={() => {
this.setState({
selectedTab: 'greenTab',
presses: this.state.presses + 1
});
}}>
{this._renderContent('#21551C', 'Green Tab')}
</TabBarIOS.Item>
</TabBarIOS>
);
},
});
var styles = StyleSheet.create({
tabContent: {
flex: 1,
alignItems: 'center',
},
tabText: {
color: 'white',
margin: 50,
},
});
module.exports = TabBarExample;
链接: https://fly63.com/course/16_883