微信小程式-跟隨選單(樓梯效果)和迴圈巢狀載入資料
阿新 • • 發佈:2019-01-03
效果如圖:
程式碼如下:
wxml
//使用迴圈巢狀data資料格式寫對即可
<scroll-view class="left" scroll-y>
<view wx:for="{{left}}" class="leftlist {{index==_click?'yes':''}}" data-i="{{index}}" bindtap="tap">
{{item.txt}}
</view>
</scroll-view>
<scroll-view class="right" scroll-y bindscroll ="scroll" scroll-into-view="{{toView}}">
<view id="{{item.id}}" wx:for="{{right}}">
<view class="title">
<text class="line"></text>
{{item.txt}}
<text class="line"></text>
</view>
<view class="li" wx:for=" {{item.li}}">
<image src="{{item.src}}"></image>
<text class="name">{{item.name}}</text>
</view>
</view>
</scroll-view>
js
Page({
data: {
toView: 'red1',
_click:0,
left: [{ txt: '新品', id: 'new' }, { txt: '手機', id: 'phone' }, { txt: '電視', id: 'mv' }, { txt: '電腦', id: 'computer' }],
right: [
{ txt: '新品', id: 'new',li: [{ src: '../../assets/images/max1.jpg', name: '小米noto' }, { src: '../../assets/images/max1.jpg', name: '小米mix' }, { src: '../../assets/images/max3.jpg', name: '小米5c' }, { src: '../../assets/images/max2.jpg', name: '小米notp' }, { src: '../../assets/images/max2.jpg', name: '小米note5' }, { src: '../../assets/images/max2.jpg', name: '小米6' }]},
{ txt: '手機', id: 'phone',li: [{ src: '../../assets/images/max2.jpg', name: '小米6s' }, { src: '../../assets/images/max3.jpg', name: '小米max' }, { src: '../../assets/images/max2.jpg', name: '小米5s' }, { src: '../../assets/images/max1.jpg', name: '小米li' }, { src: '../../assets/images/max3.jpg', name: '小米4' }, { src: '../../assets/images/max1.jpg', name: '小米max' }]},
{ txt: '電視', id: 'mv', li: [{ src: '../../assets/images/max3.jpg', name: '小米6' }, { src: '../../assets/images/max2.jpg', name: '小米mix' }, { src: '../../assets/images/max1.jpg', name: '小米7s' }, { src: '../../assets/images/max3.jpg', name: '小米2' }, { src: '../../assets/images/max1.jpg', name: '小米note7' }, { src: '../../assets/images/max3.jpg', name: '小米8' }] },
{ txt: '電腦', id: 'computer', li: [{ src: '../../assets/images/max1.jpg', name: '小米2' }, { src: '../../assets/images/max1.jpg', name: '小米mix' }, { src: '../../assets/images/max2.jpg', name: '小米max' }, { src: '../../assets/images/max1.jpg', name: '小米6' }, { src: '../../assets/images/max3.jpg', name: '小米note' }, { src: '../../assets/images/max1.jpg', name: '小米max' }] }]
},
scroll: function (e) {
console.log(e)//右側列表滑動-左側列表名稱樣式跟著改變,然而我不會寫,擱置中,誰會告訴我,謝謝!
},
tap: function (e) {
var j = parseInt(e.currentTarget.dataset.i);
this.setData({
toView: this.data.left[j].id,//控制檢視滾動到為此id的<view>
_click:j //控制左側點選後樣式
})
},
})
wxss
page{border-top:1px solid #f6f6f6;}
.left{
height:100%;
width: 19%;
display: inline-block;
background:#fff;
text-align:center;
border-right:1px solid #eee;
}
.leftlist{
font-size:12px;
padding:10px;
}
.right{
height:100%;
width: 80%;
display: inline-block;
background:#fff;
text-align:center;
}
.line{
width:15px;
height:1px;
background:#ddd;
display:inline-block;
vertical-align:super;
margin:0 15px;
}
.li{
height:10%;
width:30%;
display:inline-block;
text-align:center;
}
.li image{width:60px;height:60px;}
.li .name{
font-size:12px;
display:block;
color:#888;
overflow:hidden;
white-space:nowrap;
text-overflow:ellipsis;
}
.title{padding:20px 0;}
.yes{color: #f99;font-size: 14px;}
友情提示:
一、左側點選樣式改變:
利用自身index與點選的元素的index比較。
data-i=“{{獲取當前index傳給_click儲存}}”,
class=”leftlist {{index==_click?’yes’:”}}”,
此處index是自身的,如果自身和點選的一致就新增,yes類名,否側滯空清除yes樣式。
二、點選左側,右側跟隨:
利用
scroll-into-view=”{{id}}”,
檢視會滾動到id為此id的view標籤。我是直接從data資料裡取得id,也可以直接獲取點選元素id。
三、迴圈巢狀:data資料格式寫對,按照官方文件就行。