WeChat development top selection card

This article talks about the top selection card of WeChat development. If you don’t know about the top selection card of WeChat development or are interested in the top selection card of WeChat development, then let’s take a look at this article together. Okay, enough nonsense. Let’s get to the point!

The top tab of the WeChat applet is very commonly used in development. It will take a while to implement it below.

Rendering:

##The code is directly below:

wxml:

<!--pages/index/index.wxml-->
<view class="swiper-tab">
    <view class="tab-item {{currentTab==0 ? &#39;on&#39; : &#39;&#39;}}" data-current="0" bindtap="swichNav">选项一</view>
    <view class="tab-item {{currentTab==1 ? &#39;on&#39; : &#39;&#39;}}" data-current="1" bindtap="swichNav">选项二</view>
    <view class="tab-item {{currentTab==2 ? &#39;on&#39; : &#39;&#39;}}" data-current="2" bindtap="swichNav">选项三</view>
</view>

<swiper current="{{currentTab}}" class="swiper" duration="300" style="height:{{winHeight - 30}}px" bindchange="bindChange">
    <swiper-item>
        <view>页面一</view>
    </swiper-item>
    <swiper-item>
        <view>页面二</view>
    </swiper-item>
    <swiper-item>
        <view>页面三</view>
    </swiper-item>
</swiper>

wxss:

/* pages/index/index.wxss */
.swiper-tab{
    width: 100%;  
    text-align: center;  
    line-height: 80rpx;
    border-bottom: 1px solid #000;
    display: flex;
    flex-direction: row;
    justify-content: center;
}
.tab-item{
    flex: 1;
    font-size: 30rpx;  
    display: inline-block;   
    color: #777777;
}
.on{
    color: red;  
    border-bottom: 5rpx solid red;
}
.swiper{ display: block; height: 100%; width: 100%; overflow: hidden; }  
.swiper view{  
    text-align: center; 
    padding-top: 100rpx; 
}

js:

// pages/index/index.js
Page({

    /**
     * 页面的初始数据
     */
    data: {
        winWidth:0,
        winHeight:0,
        currentTab:0
    },

    /**
     * 生命周期函数--监听页面加载
     */
    onLoad: function (options) {
        var that = this;

        /** 
         * 获取系统信息 
         */
        wx.getSystemInfo({

            success: function (res) {
                that.setData({
                    winWidth: res.windowWidth,
                    winHeight: res.windowHeight
                });
            }

        });  
    },
    bindChange: function (e) {

        var that = this;
        that.setData({ currentTab: e.detail.current });

    },
    swichNav: function (e) {

        var that = this;

        if (this.data.currentTab === e.target.dataset.current) {
            return false;
        } else {
            that.setData({
                currentTab: e.target.dataset.current
            })
        }
    } ,  
    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {

    },

    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom: function () {

    },

    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {

    }
})

The above is the implementation process, which is generally not difficult. You can refer to it as a reference. If you don’t know much about it, you can easily master it by implementing more of both sides!

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