微信小程序开发之改变data中数组或对象的某一属性值
(编辑：jimmy 日期: 2024/11/18 浏览：3 次 )
前言：在小程序的开发中，我们在view中便利data中数组或对象时，很多情况下需要在js中动态改变数组或者对象中某一香的属性值。
效果图：
我给大家总结了案例如下：
wxml如下：
<scroll-view class='hd-cont' scroll-x="true" style='width: 100%'>
<view wx:for="{{sDate}}" wx:key="{{index}}" class='date-cont'>
<view>{{item.week}}</view>
<view bindtap='select' data-index="{{index}}" class=' curl {{item.selected}}'>{{item.date}}</view>
</view>
</scroll-view>
wxss如下：
.hd-cont {
height: 126rpx;
white-space: nowrap;
padding-left: 20rpx;
color: #fff;
font-size: 28rpx;
box-sizing: border-box;
}
.date-cont {
width: 40rpx;
margin-right: 70rpx;
height: 100%;
display: inline-block;
padding-top: 10rpx;
box-sizing: border-box;
text-align: center;
}
.curl {
width: 40rpx;
height: 40rpx;
border-radius: 50%;
line-height: 40rpx;
}
.date-cont view:first-child {
margin-bottom: 20rpx;
}
.focus {
display: inline-block;
width: 40rpx;
height: 40rpx;
font-family: Monaco;">#fff;
color: #16cc80;
border-radius: 50%;
line-height: 40rpx;
}
wxjs如下：
实现思路：点击某一个日期时，获取当前点击的下表，点击事件bindtap可以获取到所点击的元素的自定义属性，也就是所点击的元素的在data中数组的下标，点击触发，清空所有对象中selected的值，然后将所点击的下标的selected值变为focus就可实现点击某一元素动态改变数组中的某一属性值。
Page({
data: {
sDate: [
{ "week": "日", "date": "01" ,"selected": "focus" },
{ "week": "一", "date": "02", "selected": " " },
{ "week": "二", "date": "03", "selected": " " },
{ "week": "三", "date": "04", "selected": " " },
{ "week": "四", "date": "05", "selected": " " },
{ "week": "五", "date": "06", "selected": " " },
{ "week": "六", "date": "07", "selected": " " },
{ "week": "日", "date": "08", "selected": " " },
{ "week": "一", "date": "09", "selected": " " },
{ "week": "二", "date": "10", "selected": " " },
{ "week": "三", "date": "11", "selected": " " },
{ "week": "四", "date": "12", "selected": " " },
{ "week": "五", "date": "13", "selected": " " },
{ "week": "六", "date": "14", "selected": " " },
]
},
select: function (e) {
var oIndex = e.currentTarget.dataset.index;
var array = this.data.sDate;
array.forEach( (item,index,arr) => {
var sItem = "sDate["+ index + "].selected";
this.setData({
[sItem]: " "
})
console.log([sItem]);
if(index == oIndex) {
var oSelected = "sDate[" + index + "].selected"//这里需要将设置的属性用字符串进行拼接
this.setData({
[oSelected]: "focus"
})
}
})
},
})
总结
以上所述是小编给大家介绍的微信小程序开发之改变data中数组或对象的某一属性值，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！
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