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微信小程序tabBar模板用法实例分析【附demo源码下载】

2019-11-19 14:50:30
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本文实例讲述了微信小程序tabBar模板用法。分享给大家供大家参考,具体如下:

众所周知,微信小程序的tabBar都是新开页面的,而微信文档上又表明了最多只能打开5层页面。这样就很容易导致出问题啦,假如我的tabBar有5个呢?下面是微信原话:

一个应用同时只能打开5个页面,当已经打开了5个页面之后,wx.navigateTo不能正常打开新页面。请避免多层级的交互方式,或者使用wx.redirectTo

因此这几天想着根据微信tabBar数组来自定义模板供页面调用。不过我在list里面每个对象都增加了一个selectedColor和active属性,方便对每个tabBar当前页做样式,如果不传直接使用设置的selectedColor。因此这串数据只能设定在各个页面下,不能设定在公用的app.js配置文件下,稍微有点代码冗余,下次研究下怎么直接配置到app.js完善下。

只要新建一个tarBar.wxml模板页,然后引用模板的页面传入数据即可,代码如下:

<template name="tabBar"> <view class="flex-h flex-hsb 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="pagePath">  <navigator url="{{item.pagePath}}" open-type="redirect" class="menu-item" style="{{item.active? 'color: '+(item.selectedColor? item.selectedColor : tabBar.selectedColor) : ''}}">   <image src="{{item.selectedIconPath}}" wx:if="{{item.active}}"></image>   <image src="{{item.iconPath}}" wx:if="{{!item.active}}"></image>   <text>{{item.text}}</text>  </navigator>  </block> </view></template>

接下来进行测试,首先是index.js的配置对象:

//配置tabBar  tabBar: {   "color": "#9E9E9E",   "selectedColor": "#f00",   "backgroundColor": "#fff",   "borderStyle": "#ccc",   "list": [    {     "pagePath": "/pages/index/index",     "text": "主页",     "iconPath": "../../img/tabBar_home.png",     "selectedIconPath": "../../img/tabBar_home_cur.png",     //"selectedColor": "#4EDF80",     active: true    },    {     "pagePath": "/pages/village/city/city",     "text": "目的地",     "iconPath": "../../img/tabBar_village.png",     "selectedIconPath": "../../img/tabBar_village_cur.png",     "selectedColor": "#4EDF80",     active: false    },    {     "pagePath": "/pages/mine/mine",     "text": "我的",     "iconPath": "../../img/tabBar_mine.png",     "selectedIconPath": "../../img/tabBar_mine_cur.png",     "selectedColor": "#4EDF80",     active: false    }   ],   "position": "bottom"  }

index.wxml引入模板:

<import src="../../template/tabBar.wxml" /><template is="tabBar" data="{{tabBar: tabBar}}" />

接下来是mine.js文件引入配置对象:

//配置tabBar  tabBar: {   "color": "#9E9E9E",   "selectedColor": "#f00",   "backgroundColor": "#fff",   "borderStyle": "#ccc",   "list": [    {     "pagePath": "/pages/index/index",     "text": "主页",     "iconPath": "../../img/tabBar_home.png",     "selectedIconPath": "../../img/tabBar_home_cur.png",     //"selectedColor": "#4EDF80",     active: false    },    {     "pagePath": "/pages/village/city/city",     "text": "目的地",     "iconPath": "../../../img/tabBar_village.png",     "selectedIconPath": "../../../img/tabBar_village_cur.png",     "selectedColor": "#4EDF80",     active: false    },    {     "pagePath": "/pages/mine/mine",     "text": "我的",     "iconPath": "../../img/tabBar_mine.png",     "selectedIconPath": "../../img/tabBar_mine_cur.png",     "selectedColor": "#4EDF80",     active: true    }   ],   "position": "bottom"  }

mine.wxml引入模板:

<import src="../../template/tabBar.wxml" /><template is="tabBar" data="{{tabBar: tabBar}}" />

最后演示如下:

方案二,我把配置数据统一放在app.js文件,通过点击跳转页面后在把数据添加到当前页面实例上,具体做法如下:

1、app.js文件配置:

//app.jsvar net = require('common/net');var a_l, a_d = {}, a_cbSucc, a_cbSuccFail, a_cbFail, a_cbCom, a_h, a_m;App({ onLaunch: function () {  var that = this; }, //修改tabBar的active值 editTabBar: function () {  var _curPageArr = getCurrentPages();  var _curPage = _curPageArr[_curPageArr.length - 1];<span style="font-family: Arial, Helvetica, sans-serif;">//相当于Page({})里面的this对象</span>  var _pagePath=_curPage.__route__;  if(_pagePath.indexOf('/') != 0){   _pagePath='/'+_pagePath;  }  var tabBar=this.globalData.tabBar;  for(var i=0; i<tabBar.list.length; i++){   tabBar.list[i].active=false;   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   }  }  _curPage.setData({   tabBar: tabBar  }); }, globalData: {  userInfo: null,  //配置tabBar  tabBar: {   "color": "#9E9E9E",   "selectedColor": "#f00",   "backgroundColor": "#fff",   "borderStyle": "#ccc",   "list": [    {     "pagePath": "/pages/index/index",     "text": "主页",     "iconPath": "/pages/templateImg/tabBar_home.png",     "selectedIconPath": "/pages/templateImg/tabBar_home_cur.png",     "selectedColor": "#4EDF80",     active: false    },    {     "pagePath": "/pages/village/city/city",     "text": "目的地",     "iconPath": "/pages/templateImg/tabBar_village.png",     "selectedIconPath": "/pages/templateImg/tabBar_village_cur.png",     "selectedColor": "#4EDF80",     active: false    },    {     "pagePath": "/pages/mine/mine",     "text": "我的",     "iconPath": "/pages/templateImg/tabBar_mine.png",     "selectedIconPath": "/pages/templateImg/tabBar_mine_cur.png",     "selectedColor": "#4EDF80",     active: false    }   ],   "position": "bottom"  } }})

2、index.js+mine.js+city.js页面使用:

var App=getApp();Page({ data:{  detail: {}, }, onLoad:function(options){  App.editTabBar();//添加tabBar数据  var that=this; }})

最终演示和上图一致!

附:完整demo代码点击此处本站下载

希望本文所述对大家微信小程序开发有所帮助。

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