微信小程序--swiper中current问题
微信小程序--swiper不显示之current问题
2019/2/22
index.wxml文件
<swiper
indicator-dots="{{indicatorDots}}" autoplay="{{autoplay}}" circular="{{circular}}" vertical="{{vertical}}"
interval="{{interval}}" duration="{{duration}}" previous-margin="{{previousMargin}}px" next-margin="{{nextMargin}}px">
<block wx:for="{{imageArr}}" wx:key="*this">
<swiper-item>
<image src='{{item}}'></image>
</swiper-item>
</block>
</swiper>
index.js文件
Page({
data: {
indicatorDots: true,
vertical: false,
autoplay: false,
circular: false,
interval: 2000,
duration: 500,
previousMargin: 0,
nextMargin: 0,
imageArr:[
'http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg',
'http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg',
'http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg',
'http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg'
]
},
图片数组 imageArr 动态的改变数组的数量,
例如:当 imageArr 中的长度为4,轮播滚动到 3 ,current=3;此时swiper没有绑定current,并将 imageArr 的长度动态改为2,这会出现current还是3,导致swiper不显示的问题。
imageArr:[
'http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg',
'http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg',
]
解决:
index.wxml 中在swiper中绑定current
<swiper
current="{{current}}"
indicator-dots="{{indicatorDots}}" autoplay="{{autoplay}}" circular="{{circular}}" vertical="{{vertical}}"
interval="{{interval}}" duration="{{duration}}" previous-margin="{{previousMargin}}px" next-margin="{{nextMargin}}px">
<block wx:for="{{imageArr}}" wx:key="*this">
<swiper-item>
<image src='{{item}}'></image>
</swiper-item>
</block>
</swiper>
index.js 中增加current
data: {
current: 0,
}
onShow(){
this.setData({ current : 0 })
}