小程序開發之改變data中數組或對象的某一屬性值

前言：在小程序的開發中，咱們在view中便利data中數組或對象時，不少狀況下須要在js中動態改變數組或者對象中某一香的屬性值。

效果圖：

我給你們總結了案例以下：

 

wxml以下：

<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以下：

.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以下：

實現思路：點擊某一個日期時，獲取當前點擊的下表，點擊事件bindtap能夠獲取到所點擊的元素的自定義屬性，也就是所點擊的元素的在data中數組的下標，點擊觸發，清空全部對象中selected的值，而後將所點擊的下標的selected值變爲focus就可實現點擊某一元素動態改變數組中的某一屬性值。

 

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"//這裏須要將設置的屬性用字符串進行拼接
            this.setData({
            [oSelected]: "focus"
            })
        }
    })
},
})

 

這裏狗尾草也就給你們總結完了，但願對你們有所幫助，有問題記得及時反饋哦，狗尾草和你們一塊兒進步。