简单的左滑操作和瀑布流布局
只是简单的实现了左滑功能，和瀑布流的布局。如有不明白之处，或者有bug之处请在下方回帖说明！！
实例代码：
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Page({
data: {
images: [{ pic: “../../images/1.png”, height: 0 }, { pic: “../../images/2.png”, height: 0 }, { pic: “../../images/3.png”, height: 0 }, { pic: “../../images/4.png”, height: 0 }, { pic: “../../images/5.png”, height: 0 },{ pic: “../../images/1.png”, height: 0 }, { pic: “../../images/2.png”, height: 0 },],
scroll_H: 0,
imgWidth: 0,
oneimages: [],
twoimages: [],
oImageIndex: []
},
onLoad: function (options) {
// 页面初始化 options为页面跳转所带来的参数
var that = this;
wx.getSystemInfo({
success: function (res) {
console.log(res);
var _width = res.windowWidth;
var imgWidth = _width * 0.48; //样式表里面设置的宽度
var scroll_H = res.windowHeight * (750 / res.windowWidth);
that.setData({
scroll_H: scroll_H,
imgWidth: imgWidth
})
}
})
var images = this.data.images;
var oImageIndex = [];//把数组下标存入临时对象中
for (var i = 0; i < images.length; i++) {
oImageIndex.push(i);
}
this.setData({
oImageIndex: oImageIndex
})
},
onReady: function () {
// 页面渲染完成
},
onShow: function () {
// 页面显示
},
onHide: function () {
// 页面隐藏
},
onUnload: function () {
// 页面关闭
},
loadimg: function (e) {//图片加载完成执行
var index = e.currentTarget.id;
console.log(index)
var oImageIndex = this.data.oImageIndex;
var tempIndex = 0;
for (var i = 0; i < oImageIndex.length; i++) {
if (oImageIndex[i] == index) {
tempIndex = i;
break;
}
}
var imgWidth = this.data.imgWidth;//图片设置的宽度
var oImgW = e.detail.width;//图片原始宽度
var scal = imgWidth / oImgW;//比例计算
var oImgH = e.detail.height;//图片原始高度
var _imgHeight = oImgH * scal;//自适应高度
var images = this.data.images;
images[index].height = _imgHeight;
oImageIndex.splice(tempIndex, 1);
this.setData({
oImageIndex: oImageIndex,
images: images
})
var oneimages = this.data.oneimages;
var twoimages = this.data.twoimages;
if (oImageIndex.length == 0) { //当加载完最后一张图片执行
var oneImageH = 0;
var twoImageH = 0;
for (var i = 0; i < images.length; i++) {
if (i > 0) { //第一张除外
if (oneImageH > twoImageH) {
twoImageH += images[i].height;
twoimages.push(images[i]);
} else {
oneImageH += images[i].height;
oneimages.push(images[i]);
}
} else {
oneImageH += images[i].height;
oneimages.push(images[i])
}
}
}
this.setData({
oneimages: oneimages,
twoimages: twoimages
})
}
})
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<scroll-view scroll-y=”true” style=”height:{{scroll_H}}rpx”>
<view style=”height:0;overflow:hidden”>
<view wx:for=”{{images}}” wx:key=”index”>
<image id=”{{index}}” src=”{{item.pic}}” data-item=”1″ bindload=”loadimg” ></image>
</view>
</view>
<view style=”width:100%”>
<view class=”img_item”>
<view wx:for=”{{oneimages}}” wx:key=”index” >
<image id=”{{index}}” src=”{{item.pic}}” data-item=”1″ style=”width:100%;height:{{item.height}}px”></image>
</view>
</view>
<view class=”img_item”>
<view wx:for=”{{twoimages}}” wx:key=”index”>
<image id=”{{index}}” src=”{{item.pic}}” style=”width:100%;height:{{item.height}}px”></image>
</view>
</view>
</view>
</scroll-view>
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