React原生弹性框不使用所有可用空间

Question

我有一个我想要全屏的布局.这就是它现在的样子:

我想要的是布局占用屏幕上的所有空间(所以提交按钮应该在底部向下).我正在尝试使用,{flex: 1}但它不起作用.这是代码:

'use strict';

const React = require('react-native');
const {
  StyleSheet,
  Text,
  View,
  BackAndroid,
  TextInput,
  TouchableNativeFeedback,
  ScrollView
} = React;

const ActionButton = require('./action-button');

module.exports = React.createClass({
  handleBackButtonPress () {
    if (this.props.navigator) {
      this.props.navigator.pop();
      return true;
    }

    return false;
  },

  componentWillMount () {
    BackAndroid.addEventListener('hardwareBackPress', this.handleBackButtonPress);
  },

  componentWillUnmount () {
    BackAndroid.removeEventListener('hardwareBackPress', this.handleBackButtonPress);
  },

  onInputFocus (refName) {
    setTimeout(() => {
      let scrollResponder = this.refs.scrollView.getScrollResponder();
      scrollResponder.scrollResponderScrollNativeHandleToKeyboard(
        React.findNodeHandle(this.refs[refName]),
        0,
        true
      );
    }, 50);
  },

  render: function() {
    return (
      <ScrollView ref='scrollView' style={styles.scroller}>
        <View style={styles.container}>
          <View style={styles.header}>
            <Text>New Post</Text>

              <View style={styles.actions}>
                <ActionButton handler={this.handleBackButtonPress} icon={'fontawesome|close'}
                  size={15} width={15} height={15} />
              </View>
          </View>
          <View style={styles.content}>
            <TextInput underlineColorAndroid={'white'}
              placeholder={'Who\'s your professor?'}
              ref='professor'
              onFocus={this.onInputFocus.bind(this, 'professor')}
              style={styles.professor}
              />

            <TextInput multiline={true}
              underlineColorAndroid={'white'}
              placeholder={'What do you think?'}
              ref='post'
              onFocus={this.onInputFocus.bind(this, 'post')}
              style={styles.post}
              />
          </View>
          <View style={styles.footer}>
            <TouchableNativeFeedback
              background={TouchableNativeFeedback.SelectableBackground()}>

              <View style={{width: 50, height: 25, backgroundColor: 'green'}}>
                <Text>Submit</Text>
              </View>
            </TouchableNativeFeedback>
          </View>
        </View>
      </ScrollView>
    );
  }
});

const styles = StyleSheet.create({
  scroller: {
    flex: 1,
    flexDirection: 'column'
  },
  container: {
    flex: 1,
    flexDirection: 'column',
    justifyContent: 'flex-start',
    backgroundColor: 'white',
    padding: 5,
  },
  post: {
    flex: 3
  },
  professor: {
    flex: 1
  },
  actions: {
    flex: 1,
    flexDirection: 'row',
    justifyContent: 'flex-end',
    alignSelf: 'center'
  },
  header: {
    flex: 1,
    padding: 5,
    flexDirection: 'row'
  },
  content: {
    flex: 4
  },
  footer: {
    flex: 1
  }
});

从我所看到的,我将flex属性一直设置在视图层次结构中,但仍然没有做任何事情(在顶层是一个导航器,{flex:1}也是如此).有什么建议？

Answer 1

你想要的是组件的contentContainerStyle支柱ScrollView.如果你替换:

<ScrollView ref='scrollView' style={styles.scroller}>

用:

<ScrollView ref='scrollView' contentContainerStyle={styles.scroller}>

这将解决您的问题.

正如文件中所述:

这些样式将应用于包含所有子视图的滚动视图内容容器.

希望能帮助到你!

Answer 2

您需要为最外层容器设置一个 flexDirection: 'row' 属性：

scroller: {
  flex:1,
  flexDirection: 'row'
}

我在这里设置了您的应用程序的基本版本。完整工作示例的其余代码粘贴在下面：

https://rnplay.org/apps/gjBqgw

'use strict';

var React = require('react-native');
var {
  StyleSheet,
  Text,
  View,
  BackAndroid,
  TextInput,
  TouchableNativeFeedback,
  ScrollView,
  AppRegistry,
  TouchableHighlight
} = React;

var SampleApp = React.createClass({
   render: function() {
    return (
      <ScrollView ref='scrollView' style={styles.scroller}>
        <View style={styles.container}>
          <View style={styles.header}>
            <Text>New Post</Text>

              <View style={styles.actions}>
                <TouchableHighlight handler={this.handleBackButtonPress} icon={'fontawesome|close'}
                  size={15} width={15} height={15}>
                            <Text>Button Text</Text>
                        </TouchableHighlight>
              </View>
          </View>
          <View style={styles.content}>
           <Text>Hello from content</Text>
          </View>
          <View style={styles.footer}>
            <TouchableHighlight>

              <View style={{width: 50, height: 25, backgroundColor: 'green'}}>
                <Text>Submit</Text>
              </View>
            </TouchableHighlight>
          </View>
        </View>
      </ScrollView>
    );

  }
});

const styles = StyleSheet.create({
  scroller: {
    flex:1,
    flexDirection: 'row'
  },
  container: {
    flex: 1,
    backgroundColor: 'white',
    padding: 5,
  },
  post: {
    flex: 3
  },
  professor: {
    flex: 1
  },
  actions: {
    flex: 1,
    flexDirection: 'row',
    alignSelf: 'center'
  },
  header: {
    flex: 1,
    padding: 5,
    flexDirection: 'row'
  },
  content: {
    flex: 4
  },
  footer: {
    flex: 1,
  }
});

AppRegistry.registerComponent('SampleApp', () => SampleApp);