React Native：iOS 选项卡

属性

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style View#style

例子

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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;