我正在练习React Native编程,但Flex Layout出现了一个问题,我似乎不太了解
我想让我的测试应用看起来像下面的图片
但是最后,这就是我得到的。 “主页”文本中存在一些未对齐的情况,该对齐方式可能正确居中,并且右两个图标上缺少空格。
我尝试过在两个图标上添加填充,但是没有运气。
这是我的代码:
import React from 'react';
import Icon from 'react-native-vector-icons/Feather';
import { StyleSheet, Text, View } from 'react-native';
export default class App extends React.Component {
render() {
return (
<View style={styles.container}>
<View style={styles.headerContainer}>
<View style={styles.headerBrandingContainer}>
<Text style={styles.headerBranding}>Brand</Text>
</View>
<View style={styles.headerRowContainer}>
<Icon name="menu" size={30} color="white" />
<Text style={styles.headerRowPage}>Home</Text>
<View style={styles.headerRowIcons}>
<Icon name="filter" size={30} color="white" />
<Icon name="search" size={30} color="white" />
</View>
</View>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column',
},
headerContainer: {
backgroundColor: '#3498db',
height: 180,
justifyContent: 'center',
},
headerBrandingContainer: {
marginTop: 50,
alignItems: 'center',
},
headerBranding: {
fontSize: 40,
fontWeight: '400',
letterSpacing: 1,
color: '#fff',
},
headerRowContainer: {
flexDirection: 'row',
justifyContent: 'space-between',
margin: 10
},
headerRowIcons: {
//backgroundColor: 'red',
flexDirection: 'row',
justifyContent: 'space-between',
},
headerRowPage: {
// marginLeft:20,
fontSize: 25,
fontWeight: '500',
color: '#fff',
}
});
答案 0 :(得分:1)
要垂直对齐headerContainer的子代,应使用alignItems和以下代码:
headerContainer: {
display: 'flex',
backgroundColor: '#3498db',
height: 180,
justifyContent: 'center',
alignItems: 'center'
}
了解flexbox的有用资源:https://css-tricks.com/snippets/css/a-guide-to-flexbox/
也删除headerBrandingContainer样式上的marginTop。
编辑:
最后,我认为最好的方法是在组件树中进行一些修改,以使headerRowContainer项均为1的flex元素。这样,标题始终居中(视图具有相同的大小),我们可以现在可以在不影响其余按钮的情况下管理按钮的放置。它对我来说很完美。
import React from 'react';
import Icon from 'react-native-vector-icons/Feather';
import { StyleSheet, Text, View } from 'react-native';
export default class App extends React.Component {
render() {
return (
<View style={styles.container}>
<View style={styles.headerContainer}>
<View style={styles.headerBrandingContainer}>
<Text style={styles.headerBranding}>Brand</Text>
</View>
<View style={styles.headerRowContainer}>
<View style={styles.buttonsContainerLeft}>
<Icon name="menu" size={30} color="white" />
</View>
<View style={styles.titleContainer}>
<Text style={styles.headerRowPage}>Home</Text>
</View>
<View style={styles.headerRowIcons}>
<Icon
name="filter"
size={30}
color="white"
style={styles.filterIcon}
/>
<Icon name="search" size={30} color="white" />
</View>
</View>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column'
},
headerContainer: {
backgroundColor: '#3498db',
height: 180,
justifyContent: 'center'
},
headerBrandingContainer: {
marginTop: 50,
alignItems: 'center'
},
headerBranding: {
fontSize: 40,
fontWeight: '400',
letterSpacing: 1,
color: '#fff'
},
headerRowContainer: {
flex: 1,
flexDirection: 'row',
alignItems: 'center',
margin: 10
},
buttonsContainerLeft: {
flex: 1,
flexDirection: 'row',
justifyContent: 'flex-start'
},
titleContainer: {
flex: 1,
alignItems: 'center',
justifyContent: 'center'
},
headerRowIcons: {
flex: 1,
alignItems: 'center',
flexDirection: 'row',
justifyContent: 'flex-end'
},
headerRowPage: {
fontSize: 25,
fontWeight: '500',
color: '#fff'
},
filterIcon: {
marginRight: 20
}
});