微信小程序开发之改变data中数组或对象的某一属性值


            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中文源码网网站的支持！