如果单击索引0,则该方法不起作用。如果单击索引0,则1和2将停止工作。如果我在1或2上单击2次,则滑块将转到所需的幻灯片。但零指数根本不起作用。请告诉我,可能是什么问题?
<Swiper
onMomentumScrollEnd={(e, state, context) => this.setState({index:
state.index})}
ref={(swiper) => {this.swiper = swiper;}}
showsButtons={false}
width={500}
height={500}
showsPagination={false}
index={0}
loop={true} >
<View>
<Text>One</Text>
</View>
<View>
<Text>Two</Text>
</View>
<View>
<Text>Three</Text>
</View>
</Swiper>
<Text onPress={()=>{this.swiper.scrollBy(0, true)}}>One</Text>
<Text onPress={()=>{this.swiper.scrollBy(1, true)}}>Two</Text>
<Text onPress={()=>{this.swiper.scrollBy(2, true)}}>Three</Text>
我做了这个方法:
onClickScroll(index){
let currentIndex = this.state.index;
if(currentIndex !== index) {
let resultSlide = undefined;
let countSlides = this.state.itineraryDaysListItem.length;
if(index > currentIndex && index !== countSlides)
{
resultSlide = index - currentIndex;
this.swiper.scrollBy(resultSlide, true);
}
else if(index>currentIndex && index === countSlides)
{
resultSlide = currentIndex+1;
this.swiper.scrollBy(resultSlide, true);
}
else if(index < currentIndex && index !== 0){
resultSlide = (currentIndex - index) * (-1);
this.swiper.scrollBy(resultSlide, true);
}
else if(index < currentIndex && index === 0){
resultSlide = currentIndex * (-1);
this.swiper.scrollBy(resultSlide, true);
}
}
}
以下实现对我有用
'use strict'
import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View
} from 'react-native';
import Swiper from 'react-native-swiper';
var styles = StyleSheet.create({
wrapper: {
},
slide1: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#9DD6EB',
},
slide2: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#97CAE5',
},
slide3: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#92BBD9',
},
text: {
color: '#fff',
fontSize: 30,
fontWeight: 'bold',
}
})
export default class swiper extends Component{
constructor (props) {
super(props)
this.swiperRef = swiper => this.swiper = swiper
this.scrollHandler = page => {
console.log ('Page ',page,this.swiper)
this.swiper && this.swiper.scrollBy(page, true)
}
}
render (){
return (
<Swiper
ref={ this.swiperRef }
showsButtons={false}
width={500}
height={500}
showsPagination={false}
index={0}
loop={true} >
<View style={ styles.slide1 }>
<Text style={ styles.text } onPress={()=>{console.log('Page 0'); this.swiper.scrollBy(1, true)}}>One</Text>
</View>
<View style={ styles.slide2 }>
<Text style={ styles.text } onPress={()=>{console.log('Page 1'); this.swiper.scrollBy(1, true)}}>Two</Text>
</View>
<View style={ styles.slide3 } >
<Text style={ styles.text } onPress={()=>{console.log('Page 2');this.swiper.scrollBy(2, true)}}>Three</Text>
</View>
</Swiper>
)
}
}
AppRegistry.registerComponent('myproject', () => swiper);
这对我有用。
export default class Navigator extends Component {
constructor(props) {
super(props);
this.onPressActiveButton = this.onPressActiveButton.bind(this);
this.state = {
idxActive: 0
}
}
getIdxActive = () => {
return this.state.idxActive
}
onPressActiveButton = (index) => {
this.refs._swiper.scrollBy(index - this.state.idxActive, true);
}
onIndexChanged(index){
this.setState({
idxActive: index
});
}
render() {
return (
<View style={styles.container}>
<Toolbar
buttons={tabButtons}
color={getColor('#0A5F22')}
getIndex={this.getIdxActive}
onPressActiveButton={this.onPressActiveButton} />
<Swiper
ref="_swiper"
loop={true}
showsPagination={false}
onIndexChanged={this.onIndexChanged.bind(this)}>
<SmartAlarm />
<ClockView />
<TimerView />
<StopWatchView />
</Swiper>
</View>
)
}
}