微信小程序开发之改变data中数组或对象的某一属性值

2020-03-21 16:15:39

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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：

微信小程序开发,小程序开发,data,数组

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VEVB武林网网站的支持！

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