bzl*_*ght 5 javascript reactjs react-native react-native-snap-carousel
问题总结
我正在使用react-native-snap-carousel,并且渲染不正确。它仅在被刷过后才呈现,我需要在屏幕最初呈现时呈现。当我将屏幕分配给我的BottomTabNavigator的初始路径或React Navigation中我的Stack Navigator中的初始路径时,轮播会完美呈现。当我在Stack Navigator中将完全相同的屏幕分配给任何其他路线时,只有在我滑动轮播时,它才会渲染轮播。
我需要使用带有轮播的屏幕作为我的Stack Navigator中的第二条路线,但我不知道如何使其正常工作。
我尝试过的
码
旋转木马组件
import React, { useState } from "react";
import { View, Text } from "react-native";
import { useDispatch } from "react-redux";
import styles from "./StatSelectorStartComp.style";
import HeaderText from "~/app/Components/HeaderText/HeaderText";
import Carousel from "react-native-snap-carousel";
import LargeButton from "~/app/Components/Buttons/LargeButton/LargeButton";
import NavigationService from "~/app/services/NavigationService";
import { saveStartCompStatCategory } from "~/app/Redux/actions/dailyCompActions";
const StatSelectorStartComp = ({}) => {
const dispatch = useDispatch();
const ENTRIES1 = ["Kills", "Wins", "K/D", "Win %"];
const [selectedStat, setSelectedStat] = useState(ENTRIES1[0]);
const _renderItem = ({ item, index }) => {
return (
<View style={styles.slide}>
<Text style={styles.compSelectStatCarousel}>{item}</Text>
</View>
);
};
return (
<View style={styles.container}>
<View style={styles.headerTextView}>
<HeaderText header={"Configure Competition"} />
</View>
<Text style={styles.h5Secondary}> Which stat will you track?</Text>
<View style={styles.selectStatView}>
<Text style={styles.mediumGreyedOut}>Most {selectedStat} Wins</Text>
<Carousel
ref={c => {
_carousel = c;
}}
data={ENTRIES1}
renderItem={_renderItem}
sliderWidth={375}
itemWidth={100}
onSnapToItem={index => {
setSelectedStat(ENTRIES1[index]);
}}
/>
</View>
<View style={styles.buttonView}>
<LargeButton
onPress={() => {
dispatch(saveStartCompStatCategory(selectedStat));
NavigationService.navigate("CompAddFriends");
}}
buttonText="Add Friends"
/>
</View>
</View>
);
};
export default StatSelectorStartComp;
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旋转木马组件的样式
import { StyleSheet } from "react-native";
import { backgroundColor } from "~/app/Constants";
import {
h5Secondary,
mediumGreyedOut,
compSelectStatCarousel
} from "~/app/FontConstants";
export default StyleSheet.create({
container: {
flex: 1,
justifyContent: "space-between",
backgroundColor
},
headerTextView: {
flex: 1
},
h5Secondary,
selectStatView: {
flex: 3
},
mediumGreyedOut,
compSelectStatCarousel,
buttonView: {
flex: 2
}
});
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反应导航配置
const StartCompStack = createStackNavigator({
StartFriendsComp: {
screen: StartFriendsComp
},
StatSelectorStartComp: {
screen: CarouselTest
},
CompAddFriends: {
screen: CompAddFriends
},
FinalCompScreen: {
screen: FinalCompScreen
}
});
const ProfileStack = createStackNavigator({
Profile: {
screen: ProfileScreen
},
Settings: {
screen: SettingsScreen
}
});
const BottomTabNav = createBottomTabNavigator(
{
Home: {
screen: HomeScreen
},
Competitions: {
screen: Competitions
},
StartComp: {
screen: StartCompStack,
navigationOptions: () => ({
tabBarVisible: false
})
},
CompScreen: {
screen: CompScreen
},
Friends: {
screen: FriendsDrawer
},
Profile: {
screen: ProfileStack
},
FacebookFriendsList
},
{
tabBarComponent: CustomTabNav,
initialRouteName: "Home"
}
);
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图片概述了问题
ron*_*ler 23
有一个实验性配置(当前为 v3.8.4) - removeClippedSubviews-true默认设置为。设置它来false解决我的问题。
我强烈建议不要使用延迟,因为它不是确定性的,并且每个设备都会发生变化。
感谢@auticcat 在评论中写道。
小智 7
同样的问题出现在我们的项目中,一个小技巧可以帮助我们。我们已将默认加载状态设置为 true 并在 componentDidMount 中将状态设置为 false 以显示 Carousel
试试这个,它可能会帮助你
state = { loading: true };
componentDidMount() {
setTimeout(() => {
this.setState({ loading: false });
}, 10);
}
render() {
if(this.state.loading) {
return null;
}
// return component render which contain Carousel
.........
}
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