小程序图片自适应

wxml:

<image src="{{attachurl}}{{vo.cover}}" class='list-img' bindload="imageLoad" data-index="{{ index }}" style="width:{{ images[index ].width }}rpx; height:{{ images[index ].height }}rpx;"></image>

 

js

imageLoad: function (e) {

console.log(e)

var $width = e.detail.width, //获取图片真实宽度

$height = e.detail.height,

ratio = $width / $height; //图片的真实宽高比例

var viewWidth = 718, //设置图片显示宽度，左右留有16rpx边距

viewHeight = 718 / ratio; //计算的高度值

var image = this.data.images;

//将图片的datadata-index作为image对象的key,然后存储图片的宽高值

image[e.target.dataset.index] = {

width: viewWidth,

height: viewHeight

},

console.log(image)

this.setData({

images: image

})

},