微信小程序tabBar模板用法实例分析【附demo源码下载】

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.js

var 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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