How to use react-native package plug-in swiper-JS Tutorial-php.cn

How to use react-native package plug-in swiper

亚连

Release： 2018-05-25 16:43:35

Original

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This article mainly introduces how to use the react-native packaging plug-in swiper. Now I will share it with you and give you a reference.

First create a simple react-native project and create a folder. Then use the command line to enter

react-native init swiper

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. After creating the development project, I use vs

to open it. Console, install swiper dependencies.

Installation: npm i react-native-swiper --save
View: npm view react-native-swiper
Delete: npm rm react-native-swiper --save
Here also Need to update the local dependency library under npm i

Start the app project

ios: react-native run-ios
android: react-native run-android

Start coding, create a components folder in src and create a swiper.js file under it, as well as index.js, and add the documentation

import PropTypes from &#39;prop-types&#39;;
import React, { Component } from &#39;react&#39;;
import { StyleSheet, TouchableWithoutFeedback, View } from &#39;react-native&#39;;
import RNSwiper from &#39;react-native-swiper&#39;;

const styles = StyleSheet.create({
 activeDotWrapperStyle: {
  //圆点样式
 },
 activeDotStyle: {
  //圆点样式
 },
 dotStyle: {
  //圆点样式
 }
});

const activeDot = (
 <View style={styles.activeDotWrapperStyle}>
  <View style={styles.activeDotStyle} />
 </View>
);
const dot = <View style={styles.dotStyle} />;

export class Carousel extends Component {
 // Define component prop list
 static propTypes = {
  data: PropTypes.array,
  height: PropTypes.number,
  onPressItem: PropTypes.func,
  renderItem: PropTypes.func.isRequired,
  autoplay: PropTypes.bool,
  autoplayTimeout: PropTypes.number
 };

 // Define props default value
 static defaultProps = {
  data: [],
  height: 150,
  autoplay: true,
  autoplayTimeout: 2.5,
  onPressItem: () => {},
  renderItem: () => {}
 };

 // Define inner state
 state = {
  showSwiper: false
 };

 constructor(props) {
  super(props);
  this.handleItemPress = this.handleItemPress.bind(this);
 }

 componentDidMount() {
  setTimeout(() => {
   this.setState({ showSwiper: true });
  });
 }

 handleItemPress(item) {
  this.props.onPressItem(item);
 }

 _renderSwiperItem(item, index) {
  return (
   <TouchableWithoutFeedback key={index} onPress={() => this.handleItemPress(item)}>
    <View style={[{ flex: 1 }]}>{this.props.renderItem(item)}</View>
   </TouchableWithoutFeedback>
  );
 }

 render() {
  return this.props.data.length === 0 || !this.state.showSwiper ? null : (
   <RNSwiper
    height={this.props.height} //图片高度
    activeDot={activeDot} 
    dot={dot}
    style={{ backgroundColor: &#39;#fff&#39; }}
    autoplay={this.props.autoplay} //是否自动轮播
    autoplayTimeout={this.props.autoplayTimeout} //轮播秒数
   >
    {this.props.data.map((item, idx) => this._renderSwiperItem(item, idx))} //如果数据是个对象里面的数组加一个循环
   </RNSwiper>
  );
 }
}

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This is the index.js file

import { Carousel } from &#39;./carousel/Carousel&#39;;

export { Carousel };

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Public component library

This is used to place public components that have nothing to do with the business. Component implementation must consider flexibility and scalability, and cannot contain specific business logic.

The component must be prefixed by the name of the business you do, such as TryCarousel.js. Each component must be placed in a separate directory, and the directory must be all lowercase (separated by dashes), such as carousel/TryCarousel.js.

A basic component structure:

import PropTypes from &#39;prop-types&#39;;
import React, { Component } from &#39;react&#39;;

export class TryCarousel extends Component {
 // Define component prop list
 static propTypes = {};

 // Define props default value
 static defaultProps = {};

 // Define inner state
 state = {};

 constructor(props) {
  super(props);
 }

 // LifeCycle Hooks

 // Prototype Functions

 // Ensure the latest function is render
 render() {}
}

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Component list

carousel( Carousel component)

is mainly used for general image carousel and can provide click event response.

Usage:

Props:

##PropertiesDescriptionTypeDefault valuedataCarousel data sourceArray-heightHeight of Carouselnumber150onPressItemTriggered when Carousel Item is clickedfn-renderItemSpecific For the method of rendering Item, please refer to FlatListfn-autoplayWhether to automatically switchbooltrueautoplayTimeoutItem automatic switching time interval (unit s) number2.5

Places that need to be imported

import { HigoCarousel } from &#39;../../components&#39;;
<Carousel
      data={} //接受的数据
      onPressItem={} //点击事件
      height={} //图片高度
      autoplay={} //是否自动播放
      autoplayTimeout={} //过渡时间
      renderItem={item => {
       return <Image source={{ uri: item.imageSource }} style={{ flex: 1 }} />;
      }} //图片
/>

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The above is what I compiled for everyone. I hope that in the future It will be helpful to everyone.

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