react native 视图

视图

创建 UI 最基本的组件，

view

 是一个容器，它支持 flexbox 布局、风格、一些触发处理，和可访问性控制，它被设计成嵌套在其他视图里，并且有 0 到很多个任意类型的孩子。

view

 直接映射到原生视图，相当于在任意正在运行的平台上的响应，不管它是 

UIView

，

<div>

，

android.view

，等等。这个例子创建了一个视图，将两个颜色的框和自定义的组件打包填充成一行。

<View style={{flexDirection: 'row', height: 100, padding: 20}}>
<View style={{backgroundColor: 'blue', flex: 0.3}} />
<View style={{backgroundColor: 'red', flex: 0.5}} />
<MyCustomComponent {...customProps} />
</View>

为了清晰和性能，视图被设计成与样式表一起使用，尽管是内联样式也同样支持。

工具

Edit
on GitHub

'use strict';
var React = require('react-native');
var {
StyleSheet,
Text,
View,
} = React;
var styles = StyleSheet.create({
box: {
backgroundColor: '#527FE4',
borderColor: '#000033',
borderWidth: 1,
}
});
exports.title = '<View>';
exports.description = 'Basic building block of all UI.';
exports.displayName = 'ViewExample';
exports.examples = [
{
title: 'Background Color',
render: function() {
return (
<View style={{backgroundColor: '#527FE4', padding: 5}}>
<Text style={{fontSize: 11}}>
Blue background
</Text>
</View>
);
},
}, {
title: 'Border',
render: function() {
return (
<View style={{borderColor: '#527FE4', borderWidth: 5, padding: 10}}>
<Text style={{fontSize: 11}}>5px blue border</Text>
</View>
);
},
}, {
title: 'Padding/Margin',
render: function() {
return (
<View style={{borderColor: '#bb0000', borderWidth: 0.5}}>
<View style={[styles.box, {padding: 5}]}>
<Text style={{fontSize: 11}}>5px padding</Text>
</View>
<View style={[styles.box, {margin: 5}]}>
<Text style={{fontSize: 11}}>5px margin</Text>
</View>
<View style={[styles.box, {margin: 5, padding: 5, alignSelf: 'flex-start'}]}>
<Text style={{fontSize: 11}}>
5px margin and padding,
</Text>
<Text style={{fontSize: 11}}>
widthAutonomous=true
</Text>
</View>
</View>
);
},
}, {
title: 'Border Radius',
render: function() {
return (
<View style={{borderWidth: 0.5, borderRadius: 5, padding: 5}}>
<Text style={{fontSize: 11}}>
Too much use of `borderRadius` (especially large radii) on
anything which is scrolling may result in dropped frames.
Use sparingly.
</Text>
</View>
);
},
}, {
title: 'Circle with Border Radius',
render: function() {
return (
<View style={{borderRadius: 10, borderWidth: 1, width: 20, height: 20}} />
);
},
}, {
title: 'Overflow',
render: function() {
return (
<View style={{flexDirection: 'row'}}>
<View
style={{
width: 95,
height: 10,
marginRight: 10,
marginBottom: 5,
overflow: 'hidden',
borderWidth: 0.5,
}}>
<View style={{width: 200, height: 20}}>
<Text>Overflow hidden</Text>
</View>
</View>
<View style={{width: 95, height: 10, marginBottom: 5, borderWidth: 0.5}}>
<View style={{width: 200, height: 20}}>
<Text>Overflow visible</Text>
</View>
</View>
</View>
);
},
}, {
title: 'Opacity',
render: function() {
return (
<View>
<View style={{opacity: 0}}><Text>Opacity 0</Text></View>
<View style={{opacity: 0.1}}><Text>Opacity 0.1</Text></View>
<View style={{opacity: 0.3}}><Text>Opacity 0.3</Text></View>
<View style={{opacity: 0.5}}><Text>Opacity 0.5</Text></View>
<View style={{opacity: 0.7}}><Text>Opacity 0.7</Text></View>
<View style={{opacity: 0.9}}><Text>Opacity 0.9</Text></View>
<View style={{opacity: 1}}><Text>Opacity 1</Text></View>
</View>
);
},
},
];