React native 如何将导航道具传递给;createStackNavigator“;在动画中使用默认标题的步骤
在过去的几天里,我一直在为我的屏幕添加一个动画标题。我已经成功地做到了这一点,但是我现在希望在默认情况下将其作为标题应用,而不是将代码复制并粘贴到我希望使用它的所有屏幕中。此时,动画标题在屏幕中实现如下:React native 如何将导航道具传递给;createStackNavigator“;在动画中使用默认标题的步骤,react-native,react-navigation,react-navigation-stack,React Native,React Navigation,React Navigation Stack,在过去的几天里,我一直在为我的屏幕添加一个动画标题。我已经成功地做到了这一点,但是我现在希望在默认情况下将其作为标题应用,而不是将代码复制并粘贴到我希望使用它的所有屏幕中。此时,动画标题在屏幕中实现如下: const HomeStack = createStackNavigator({ Home: HomeScreen, Category: CategoryScreen, Venue: VenueScreen, Activity: ActivityScreen,
const HomeStack = createStackNavigator({
Home: HomeScreen,
Category: CategoryScreen,
Venue: VenueScreen,
Activity: ActivityScreen,
}, {
headerMode: 'screen',
defaultNavigationOptions: ({ navigation }) => ({
header:
<SafeAreaView style={{
height: 0,
overflow: 'visible',
}}>
<Animated.View style={{height: 80, width: 80,
transform: [ {translateY: navigation.getParam('headerScrollY', 0)}]
}}>
<TouchableOpacity style={{padding: 20}} onPress={() => navigation.goBack()}>
<Icon.Ionicons style={{color: '#ffffff', width: 50, height: 50}} name={'ios-arrow-round-back'} size={50} />
</TouchableOpacity>
</Animated.View>
</SafeAreaView>
}),
});
要呈现标题,请执行以下操作:
static navigationOptions = ({ navigation }) => {
return {
header: () => {
return (
<SafeAreaView style={{
height: 0,
overflow: 'visible',
}}>
<Animated.View style={{height: 80, width: 80,
transform: [ {translateY: navigation.getParam('headerScrollY', 0)}]
}}>
<TouchableOpacity style={{padding: 20}} onPress={() => navigation.goBack()}>
<Icon.Ionicons style={{color: '#ffffff', width: 50, height: 50}} name={'ios-arrow-round-back'} size={50} />
</TouchableOpacity>
</Animated.View>
</SafeAreaView>
)
}
}
};
设置动画插值的步骤
并将值传递给导航道具(这是我以后在呈现标题时必须访问的内容)
带有“scrollView”的主呈现方法调用“onScroll”事件以拾取滚动动作
render() {
return (
<ScrollView
style={Styles.wholePageContainer}
showsVerticalScrollIndicator={false}
scrollEventThrottle={16}
onScroll={Animated.event( [{nativeEvent:{contentOffset: {y: this.state.headerScrollY}}}])}
>
...
</ScrollView>
);
}
render(){
返回(
...
);
}
要设置默认标题,我必须在使用“createStackNavigator”时设置“defaultNavigationOptions”的“标题”值。我可以使用它创建一个简单的红色defaultHeader,高度为100(代码和下图):
const HomeStack=createStackNavigator({
主页:主屏幕,
类别:分类屏幕,
地点:维努埃斯维尔,
活动:活动屏幕,
}, {
headerMode:'屏幕',
默认导航选项:{
标题:
,
},
});
不幸的是,对于我的动画标题,我需要“导航”道具,因为它用于存储动画值。我已经尝试了许多方法将其传递到我需要值的地方,我想知道是否有人知道如何这样做,或者这是否可能,或者是否有人有任何建议。感谢Hend El Sahli,我现在已经获得了预期工作的代码。结果(供其他人将来参考)与之前一样,但删除每个屏幕导航选项中的标题定义和“createStackNavigator”调用如下所示:
const HomeStack = createStackNavigator({
Home: HomeScreen,
Category: CategoryScreen,
Venue: VenueScreen,
Activity: ActivityScreen,
}, {
headerMode: 'screen',
defaultNavigationOptions: ({ navigation }) => ({
header:
<SafeAreaView style={{
height: 0,
overflow: 'visible',
}}>
<Animated.View style={{height: 80, width: 80,
transform: [ {translateY: navigation.getParam('headerScrollY', 0)}]
}}>
<TouchableOpacity style={{padding: 20}} onPress={() => navigation.goBack()}>
<Icon.Ionicons style={{color: '#ffffff', width: 50, height: 50}} name={'ios-arrow-round-back'} size={50} />
</TouchableOpacity>
</Animated.View>
</SafeAreaView>
}),
});
const HomeStack=createStackNavigator({
主页:主屏幕,
类别:分类屏幕,
地点:维努埃斯维尔,
活动:活动屏幕,
}, {
headerMode:'屏幕',
defaultNavigationOptions:({navigation})=>({
标题:
navigation.goBack()}>
}),
});
你试过这个:默认导航选项:({navigation})=>({header:})
太棒了,它成功了!非常感谢你。我曾尝试过许多类似的变化,但由于文件说,标题必须是一个功能,我一直在做一个功能,我试图获得导航道具,我本来应该是一个阶段的链接,正如你所建议的。我将在下面发布工作代码。快乐编码:)我(愚蠢)的错误是我使用的是headerLeft:({navigation})=>
,它不存在!使用defaultNavigationOptions:({navigation})=>
解决了这个问题!非常感谢。
const HomeStack = createStackNavigator({
Home: HomeScreen,
Category: CategoryScreen,
Venue: VenueScreen,
Activity: ActivityScreen,
}, {
headerMode: 'screen',
defaultNavigationOptions: {
header: <View style={{backgroundColor: '#ff0000', height: 100}} />
,
},
});
const HomeStack = createStackNavigator({
Home: HomeScreen,
Category: CategoryScreen,
Venue: VenueScreen,
Activity: ActivityScreen,
}, {
headerMode: 'screen',
defaultNavigationOptions: ({ navigation }) => ({
header:
<SafeAreaView style={{
height: 0,
overflow: 'visible',
}}>
<Animated.View style={{height: 80, width: 80,
transform: [ {translateY: navigation.getParam('headerScrollY', 0)}]
}}>
<TouchableOpacity style={{padding: 20}} onPress={() => navigation.goBack()}>
<Icon.Ionicons style={{color: '#ffffff', width: 50, height: 50}} name={'ios-arrow-round-back'} size={50} />
</TouchableOpacity>
</Animated.View>
</SafeAreaView>
}),
});