React native 如何使组件在ScrollView中粘到底部,但仍有其他内容将其向下推
我有三个视图:一个在顶部、中间和底部。滚动视图占据整个屏幕。问题是现在滚动视图不可滚动React native 如何使组件在ScrollView中粘到底部,但仍有其他内容将其向下推,react-native,flexbox,React Native,Flexbox,我有三个视图:一个在顶部、中间和底部。滚动视图占据整个屏幕。问题是现在滚动视图不可滚动 <ScrollView contentContainerStyle={{flex: 1, backgroundColor: '#00ff00', flexDirection: 'column', justifyContent: 'space-between'}}> <View><SomeContent /></View> <View><
<ScrollView contentContainerStyle={{flex: 1, backgroundColor: '#00ff00', flexDirection: 'column', justifyContent: 'space-between'}}>
<View><SomeContent /></View>
<View><SomeContent /></View>
<View><SomeContent /></View>
</ScrollView>
如果我删除flex:1
滚动视图占屏幕的50%。
如何制作具有顶部、中部和底部元素的滚动视图,如下图所示
底部元素应始终位于底部,但当顶部两个组件的高度较大时,它们应向下推动底部组件,以便我可以使用滚动视图向上/向下移动。使用flexGrow而不是flex。下面给出了示例代码
<ScrollView
contentContainerStyle={{
flexGrow: 1,
flexDirection: 'column',
justifyContent: 'space-between'
}}>
<View style={{ width: 50, height: 1000, backgroundColor:'orange' }} />
<View style={{ width: 50, height: 50, backgroundColor:'black'}} />
<View style={{ width: 50, height: 50, backgroundColor:'blue'}} />
</ScrollView>
这是截图
通过删除flex:1,您只能看到视图的确切高度
<ScrollView contentContainerStyle={{ backgroundColor: '#00ff00',
flexDirection: 'column', justifyContent: 'space-between' }}>
<View style={{ width: 100, height: 100, backgroundColor:'#b0e0e6' }} />
<View style={{ width: 100, height: 100, backgroundColor:'#87ceeb'}} />
<View style={{ width: 100, height: 100, backgroundColor:'#4682b4'}} />
</ScrollView>
如果设置flex:1或flexGrow:1,ScrollView会将最小高度设置为屏幕高度
<ScrollView contentContainerStyle={{ flex: 1, backgroundColor: '#00ff00',
flexDirection: 'column', justifyContent: 'space-between' }}>
<View style={{ width: 100, height: 100, backgroundColor:'#b0e0e6' }} />
<View style={{ width: 100, height: 100, backgroundColor:'#87ceeb'}} />
<View style={{ width: 100, height: 100, backgroundColor:'#4682b4'}} />
</ScrollView>
如果视图的累积高度大于此值,则整个视图将超出屏幕高度。在这种情况下,flexGrow:1(下面部分滚动显示)将允许您滚动到内容,但flex:1将切断它
<ScrollView contentContainerStyle={{ flexGrow: 1, backgroundColor: '#00ff00',
flexDirection: 'column', justifyContent: 'space-between'}}>
<View style={{ width: 100, height: 700, backgroundColor:'#b0e0e6' }} />
<View style={{ width: 100, height: 100, backgroundColor:'#87ceeb'}} />
<View style={{ width: 100, height: 100, backgroundColor:'#4682b4'}} />
</ScrollView>
从这里,您可以在每个视图上设置Flex,以对视图填充的空白空间进行加权。例如,如果在顶部两个视图中的每个视图上设置flex:1,在底部视图上设置flex:2,则在考虑内容高度后,底部视图将从总高度的1/2增加到顶部两个视图的1/4。像这样:
<ScrollView contentContainerStyle={{ flexGrow: 1, backgroundColor: '#00ff00',
flexDirection: 'column', justifyContent: 'space-between'}}>
<View style={{ flex: 1, width: 100, height: 100, backgroundColor:'#b0e0e6' }} />
<View style={{ flex: 1, width: 100, height: 100, backgroundColor:'#87ceeb'}} />
<View style={{ flex: 2, width: 100, height: 100, backgroundColor:'#4682b4'}} />
</ScrollView>
ScrollView文档:您是否能够说明为什么flexGrow在这种情况下有帮助?