微信小程序实现banner图轮播效果

本文实例为大家分享了微信小程序实现banner图轮播的具体代码,供大家参考,具体内容如下

效果图:

indicator-active-color="#007aff"//修改选中图片圆点的颜色

js:

const app = getApp()

Page({

data: {

//-----------模拟banner图-----------

imgUrls: [

'/image/1545118381903.jpg',

'/image/1545118566631.jpg'

],

circular: true,

//是否显示画板指示点

indicatorDots: true,

//选中点的颜色

//是否竖直

vertical: false,

//是否自动切换

autoplay: true,

//自动切换的间隔

interval: 3000,

//滑动动画时长毫秒

duration: 1000,

//所有图片的高度

imgheights: [],

//图片宽度

imgwidth: 750,

//默认

current: 0

},

imageLoad: function (e) {//获取图片真实宽度

var imgwidth = e.detail.width,

imgheight = e.detail.height,

//宽高比

ratio = imgwidth / imgheight;

console.log(imgwidth, imgheight)

//计算的高度值

var viewHeight = 750 / ratio;

var imgheight = viewHeight;

var imgheights = this.data.imgheights;

//把每一张图片的对应的高度记录到数组里

imgheights[e.target.dataset.id] = imgheight;

this.setData({

imgheights: imgheights

})

},

bindchange: function (e) {

// console.log(e.detail.current)

this.setData({ current: e.detail.current })

},

}

})

wxml:

<!-------------首页轮播图----------------- -->

<view class='swiper'>

<swiper indicator-dots="{{indicatorDots}}" vertical="{{vertical}}" autoplay="{{autoplay}}" duration="{{duration}}" interval='{{interval}}'indicator-active-color="#007aff" bindchange="bindchange" circular="{{circular}}" style="height:{{imgheights[current]}}rpx;">

<block wx:for='{{imgUrls}}' wx:key="{{index}}">

<swiper-item>

<image src="{{item}}" data-id='{{index}}' class="slide-image" mode="widthFix" bindload="imageLoad" />

</swiper-item>

</block>

</swiper>

</view>

wxss:

.swiper image {

width: 100%;

height: auto;

}

.swiper-image {

height: 100%;

width: 100%;

}

.slide-image {

height: 100%;

width: 100%;

display: block;

}

以上是 微信小程序实现banner图轮播效果 的全部内容, 来源链接: utcz.com/z/344412.html

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