小程序自定义tabBar

<template name="tabBar">
  <view class="tab-bar" style="color: {{tabBar.color}}; background: {{tarBar.backgroundColor}}; {{tabBar.position==‘top‘? ‘top: 0‘ : ‘bottom: 0‘}}; {{tabBar.borderStyle? (tabBar.position==‘top‘? ‘border-bottom: solid 1px ‘+tabBar.borderStyle + ‘;‘ : ‘border-top: solid 1px ‘+tabBar.borderStyle + ‘;‘) : ‘‘}}">
  <block wx:for="{{tabBar.list}}" wx:key="index">
    <navigator url="{{item.pagePath}}" open-type="switchTab" class="{{item.clas}}" style="{{item.active? ‘color: ‘+(item.selectedColor? item.selectedColor : tabBar.selectedColor) : ‘‘}}">
      <image src="{{item.selectedIconPath}}" wx:if="{{item.active}}" class="img"></image>
      <image src="{{item.iconPath}}" wx:else="{{!item.active}}" class="img"></image>
      <text class="iconText">{{item.text}}</text>
    </navigator>
    </block>
  </view>
</template>

{
  "component": true,
  "usingComponents": {}
}

App({
  onLaunch: function () {
    wx.hideTabBar(); //隐藏小程序自带tabBar
  },
  //第一种底部  
  editTabBar: function () {
    //使用getCurrentPages可以获取当前加载中所有的页面对象的一个数组，数组最后一个就是当前页面。
    var curPageArr = getCurrentPages();    //获取加载的页面
    var curPage = curPageArr[curPageArr.length - 1];    //获取当前页面的对象
    var pagePath = curPage.route;    //当前页面url
    if (pagePath.indexOf(‘/‘) != 0) {
      pagePath = ‘/‘ + pagePath;
    }
    var tabBar = this.globalData.tabBar;
    for (var i = 0; i < tabBar.list.length; i++) {
      if (tabBar.list[i].pagePath == pagePath) {
        tabBar.list[i].active = true;    //根据页面地址设置当前页面状态    
      }else{
        tabBar.list[i].active = false;
      }
    }
    curPage.setData({
      tabBar: tabBar
    });
  },
  //第二种底部，原理同上
  editTabBar1: function () {
    //使用getCurrentPages可以获取当前加载中所有的页面对象的一个数组，数组最后一个就是当前页面。

    var curPageArr = getCurrentPages();    //获取加载的页面
    var curPage = curPageArr[curPageArr.length - 1];    //获取当前页面的对象
    var pagePath = curPage.route;    //当前页面url
    if (pagePath.indexOf(‘/‘) != 0) {
      pagePath = ‘/‘ + pagePath;
    }
    var tabBar = this.globalData.tabBar1;
    for (var i = 0; i < tabBar.list.length; i++) {
      if (tabBar.list[i].pagePath == pagePath) {
        tabBar.list[i].active = true;    //根据页面地址设置当前页面状态    
      } else {
        tabBar.list[i].active = false;
      }
    }
    curPage.setData({
      tabBar: tabBar
    });
  },
  globalData: {
    //第一种底部导航栏显示
    tabBar: {
      "color": "#b2b2b2",
      "selectedColor": "#11415F",
      "backgroundColor": "#fff",
      "borderStyle": "#eee",
      "list": [
        {
          "pagePath": "/pages/home/index/index",
          "text": "首页",
          "iconPath": "../../../images/homeIcon1.png",
          "selectedIconPath": "../../../images/homeIcon.png",
          "clas": "menu-item",
          active: true
        },
        {
          "pagePath": "/pages/my/index/index",
          "text": "我的",
          "iconPath": "../../../images/myIcon1.png",
          "selectedIconPath": "../../../images/myIcon.png",
          "clas": "menu-item",
          active: false
        }
      ],
      "position": "bottom"
    },
    //第二种底部导航栏显示
    tabBar1: {
      "color": "#b2b2b2",
      "selectedColor": "#11415F",
      "backgroundColor": "#fff",
      "borderStyle": "#eee",
      "list": [
        {
          "pagePath": "/pages/home/index/index",
          "text": "首页",
          "iconPath": "../../../images/homeIcon1.png",
          "selectedIconPath": "../../../images/homeIcon.png",
          "clas": "menu-item1",
          active: true
        },
        {
          "pagePath": "pages/invite/index/index",
          "text": "邀约",
          "iconPath": "images/trust.png",
          "selectedIconPath": "images/trust-fill.png",
          "clas": "menu-item1",
          active: false
        },
        {
          "pagePath": "/pages/my/index/index",
          "text": "我的",
          "iconPath": "../../../images/myIcon1.png",
          "selectedIconPath": "../../../images/myIcon.png",
          "clas": "menu-item1",
          active: false
        }
      ],
      "position": "bottom"
    }
  }
})

.menu-item{  
  width: 50%;
  height: 97rpx;  
  float: left;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}  
.menu-item1{  
  width: 33.3333%;
  height: 97rpx;  
  float: left;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}  
.img{ 
  width: 48rpx;
  height: 48rpx;  
  display: block;
}
.tab-bar{  
  position: fixed;  
  width: 100%;
  height: 97rpx;
  z-index: 1;
}
.iconText {
  font-size:20rpx;
  font-family:PingFang SC;
  font-weight:500;
}

"tabBar": {
    "custom": true,
    "list": [
      {
        "pagePath": "pages/home/index/index"
      },
       {
        "pagePath": "pages/invite/index/index"
      },
      {
        "pagePath": "pages/my/index/index"
      }
    ]
  },

var app = getApp(); //引用app
Page({

  /**
   * 页面的初始数据
   */
  data: {
   
  },/**
   * 生命周期函数--监听页面加载
   */
  onLoad: function () {
    
  },

  /**
   * 生命周期函数--监听页面初次渲染完成
   */
  onReady: function () {

  },

  /**
   * 生命周期函数--监听页面显示
   */
  onShow: function () {
    app.editTabBar(); //在onShow中使用所需的哪一种tabBar
  },

  /**
   * 生命周期函数--监听页面隐藏
   */
  onHide: function () {

  },

  /**
   * 生命周期函数--监听页面卸载
   */
  onUnload: function () {

  },

  /**
   * 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 () {

  }
})