React Native 组件样式测试

View组件默认样式(注意默认flexDirection:'column')

{flexGrow:0,flexShrink:0,flexBasis:'auto',flexDirection:'column',justifyContent: 'flex-start',alignItems: 'stretch',alignContent: 'stretch'}
//flex: none  =  flexGrow:0,flexShrink:0,flexBasis:'auto'
//flex: auto  =  flexGrow:1,flexShrink:1,flexBasis:'auto'

测试代码

return (
  <View>
      <Text style={{backgroundColor: '#FFFF00'}}>text 1</Text>
      <Text style={{backgroundColor: '#1445ed'}}>text 2</Text>
      <Text style={{backgroundColor: '#34951d'}}>text 3</Text>
  </View>
  );

  //与下面相同
  return (
  <View style={{flexGrow:0,flexShrink:0,flexBasis:'auto',flexDirection:'column',justifyContent: 'flex-start',alignItems: 'stretch',alignContent: 'stretch'}}>
  <Text style={{backgroundColor: '#FFFF00'}}>text 1</Text>
  <Text style={{backgroundColor: '#1445ed'}}>text 2</Text>
  <Text style={{backgroundColor: '#34951d'}}>text 3</Text>
  </View>
  );

效果：

flexDirection:'row',justifyContent 测试代码：

  let _style={
    row:{backgroundColor: '#3495ed',flex: 1,flexDirection:'row',borderWidth: 1,borderColor: 'black'},
    box:{backgroundColor: '#34951d',justifyContent: 'center',borderRadius:4,width:40},
    txt:{backgroundColor: '#FFFF00'}
  };
  return (
  <View style={{flex: 1}}>
    <View style={{backgroundColor: '#1445ed',justifyContent: 'center',flex: 0.4,flexDirection:'row'}}>
        <Text>flexDirection:'row',justifyContent test</Text>
    </View>
    <Text style={_style.txt}>flexDirection:'row',justifyContent: 'flex-start'|| ''</Text>
    <View style={[_style.row,{justifyContent:'flex-start'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'row',justifyContent: 'center'</Text>
    <View style={[_style.row,{justifyContent: 'center'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'row',justifyContent: 'flex-end'</Text>
    <View style={[_style.row,{justifyContent:'flex-end'}]}>
        <View style={_style.box}>
        </View>
    </View>

  </View>
  );

效果：

flexDirection:'row',justifyContent,alignItems测试代码：

  let _style={
    row:{backgroundColor: '#3495ed',flex: 1,flexDirection:'row',borderWidth: 1,borderColor: 'black'},
    box:{backgroundColor: '#34951d',justifyContent: 'center',borderRadius:4,width:40,height:40},
    txt:{backgroundColor: '#FFFF00'}
  };
  return (
  <View style={{flex: 1}}>
    <View style={{backgroundColor: '#1445ed',justifyContent: 'center',flex: 0.4,flexDirection:'row'}}>
        <Text>flexDirection:'row',justifyContent test,alignItems test</Text>
    </View>
    <Text style={_style.txt}>flexDirection:'row',justifyContent: 'flex-start'|| '',alignItems: 'flex-start'|| ''</Text>
    <View style={[_style.row,{justifyContent:'flex-start',alignItems: 'flex-start'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'row',justifyContent: 'center',alignItems: 'center'</Text>
    <View style={[_style.row,{justifyContent: 'center',alignItems: 'center'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'row',justifyContent: 'flex-end',alignItems: 'flex-end'</Text>
    <View style={[_style.row,{justifyContent:'flex-end',alignItems: 'flex-end'}]}>
        <View style={_style.box}>
        </View>
    </View>

  </View>
  );

效果:

flexDirection:'column',justifyContent test

  let _style={
    column:{backgroundColor: '#3495ed',flex: 1,flexDirection:'row',borderWidth: 1,borderColor: 'black'},
    box:{backgroundColor: '#34351d',justifyContent: 'center',borderRadius:4,width:40,height:40},
    txt:{backgroundColor: '#FFFF00'}
  };
  return (
  <View style={{flex: 1}}>
    <View style={{backgroundColor: '#1445ed',justifyContent: 'center',flex: 0.4,flexDirection:'column'}}>
        <Text>flexDirection:'column',justifyContent test</Text>
    </View>
    <Text style={_style.txt}>flexDirection:'column',justifyContent: 'flex-start'|| ''</Text>
    <View style={[_style.column,{justifyContent: 'flex-start'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'column',justifyContent: 'center'</Text>
    <View style={[_style.column,{justifyContent: 'center'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'column',justifyContent: 'flex-end'</Text>
    <View style={[_style.column,{justifyContent: 'flex-end'}]}>
        <View style={_style.box}>
        </View>
    </View>

  </View>
  );

flexDirection:'column',alignItems test

  let _style={
    column:{backgroundColor: '#3495ed',flex: 1,flexDirection:'row',borderWidth: 1,borderColor: 'black'},
    box:{backgroundColor: '#34351d',justifyContent: 'center',borderRadius:4,width:40,height:40},
    txt:{backgroundColor: '#FFFF00'}
  };
  return (
  <View style={{flex: 1}}>
    <View style={{backgroundColor: '#1445ed',justifyContent: 'center',flex: 0.4,flexDirection:'column'}}>
        <Text>flexDirection:'column',alignItems test</Text>
    </View>
    <Text style={_style.txt}>flexDirection:'column',alignItems: 'flex-start'|| ''</Text>
    <View style={[_style.column,{alignItems: 'flex-start'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'column',alignItems: 'center'</Text>
    <View style={[_style.column,{alignItems: 'center'}]}>
        <View style={_style.box}>
        </View>
    </View>

    <Text style={_style.txt}>flexDirection:'column',alignItems: 'flex-end'</Text>
    <View style={[_style.column,{alignItems: 'flex-end'}]}>
        <View style={_style.box}>
        </View>
    </View>

  </View>
  );