rax-scrollview v3.7.8

rax-scrollview

支持

Web / Weex / 阿里小程序 / 微信小程序 / 字节跳动小程序

描述

ScrollView 是一个包装了滚动操作的组件。一般情况下需要一个确定的高度来保证 ScrollView 的正常展现。

安装

$ npm install rax-scrollview --save

属性

方法

scrollTo({x: number,y: number, animated?: boolean, duration?: number})

参数

参数为 object，包含以下属性

scrollIntoView({id: string, animated?: boolean, duration?: number, offsetX?: number, offsetY?: number})

参数

参数为 object，包含以下属性

示例

import { createElement, Component, render, createRef } from 'rax';

import DriverUniversal from 'driver-universal';
import View from 'rax-view';
import Text from 'rax-text';
import ScrollView from 'rax-scrollview';

function Thumb() {
  return (
    <View style={styles.button}>
      <View style={styles.box} />
    </View>
  );
}

const THUMBS = new Array(20).fill(1);
const createThumbRow = (val, index) => <Thumb key={index} />;

class App extends Component {
  state = {
    horizontalScrollViewEventLog: false,
    scrollViewEventLog: false,
  };
  constructor(props) {
    super(props);
    this.horizontalScrollView = createRef();
  }

  render() {
    return (
      <View style={styles.root}>
        <View style={styles.container}>
          <ScrollView
            ref={this.horizontalScrollView}
            style={{
              height: '100rpx',
            }}
            horizontal={true}
            onEndReached={() =>
              this.setState({ horizontalScrollViewEventLog: true })
            }
          >
            {THUMBS.map(createThumbRow)}
          </ScrollView>

          <View
            style={styles.button}
            onClick={() => {
              this.horizontalScrollView.current.scrollTo({ x: 0 });
            }}
          >
            <Text>Scroll to start</Text>
          </View>

          <View style={styles.eventLogBox}>
            <Text>
              {this.state.horizontalScrollViewEventLog ? 'onEndReached' : ''}
            </Text>
          </View>
        </View>

        <View style={{ ...styles.container, height: '500rpx' }}>
          <ScrollView
            ref={scrollView => {
              this.scrollView = scrollView;
            }}
            onEndReached={() => this.setState({ scrollViewEventLog: true })}
          >
            <View>
              <View style={styles.sticky}>
                <Text>Cannot sticky</Text>
              </View>
            </View>

            <View style={styles.sticky}>
              <Text>Sticky view must in ScrollView root</Text>
            </View>

            {THUMBS.map(createThumbRow)}
          </ScrollView>

          <View
            style={styles.button}
            onClick={() => {
              this.scrollView.scrollTo({ y: 0 });
            }}
          >
            <Text>Scroll to top</Text>
          </View>

          <View style={styles.eventLogBox}>
            <Text>{this.state.scrollViewEventLog ? 'onEndReached' : ''}</Text>
          </View>
        </View>
      </View>
    );
  }
}

const styles = {
  root: {
    width: '750rpx',
    paddingTop: '20rpx',
  },
  sticky: {
    position: 'sticky',
    width: '750',
    backgroundColor: '#cccccc',
  },
  container: {
    padding: '20rpx',
    borderStyle: 'solid',
    borderColor: '#dddddd',
    borderWidth: '1rpx',
    marginLeft: '20rpx',
    marginRight: '20rpx',
    marginBottom: '10rpx',
  },
  button: {
    margin: '7rpx',
    padding: '5rpx',
    alignItems: 'center',
    backgroundColor: '#eaeaea',
    borderRadius: '3rpx',
  },
  box: {
    width: '64rpx',
    height: '64rpx',
  },
  eventLogBox: {
    padding: '10rpx',
    margin: '10rpx;,
    height: '80rpx',
    borderWidth: '1rpx',
    borderColor: '#f0f0f0',
    backgroundColor: '#f9f9f9',
  },
};

render(<App />, document.body, { driver: DriverUniversal });