在我们开发小程序的过程中,会遇到权限登录问题,不同的角色登录后显示的底部导航栏tabbar是不一样的。网上看到了很多的博客,多多少少会有些坑,会遇到问题。今天这篇博客就可以一次性解决。
了解概念
自定义tabbar
使用方法
app.json中声明custom字段为true
“custom”: true
"tabBar":{"custom":true,"selectedColor":"#3161ff","list":[{"pagePath":"pages/index/index","text":"检查","iconPath":"./assets/tabbar/check.png","selectedIconPath":"./assets/tabbar/check_select.jpg"},{"pagePath":"pages/approval/index","text":"审批","iconPath":"./assets/tabbar/approval.png","selectedIconPath":"./assets/tabbar/approval_select.png"},{"pagePath":"pages/mine/index","text":"我的","iconPath":"./assets/tabbar/me.png","selectedIconPath":"./assets/tabbar/me_select.png"}]},
根目录添加入口文件
在根目录新建文件夹,名为custom-tab-bar(名字一定不能改)
在custom-tab-bar文件夹点击右键,新建Component,名字是index(这个也不能改,都是官方要求的,改了无法显示了)
编写代码
custom-tab-bar/index.wxml
<!--custom-tab-bar/index.wxml-->
<view class="tab-bar">
<view class="tab-bar-border"></view>
<view wx:for="{{selectList}}" wx:key="index" class="tab-bar-item" data-path="{{item.pagePath}}" data-selected="{{item.selected}}" bindtap="switchTab">
<image class="cover-image" src="{{selected === item.selected ? item.selectedIconPath : item.iconPath}}"></image>
<view class="cover-view" style="color: {{selected === item.selected ? selectedColor : color}}">{{item.text}}</view>
</view>
</view>
custom-tab-bar/index.wxss
/* custom-tab-bar/index.wxss */.tab-bar{position: fixed;bottom: 0;left: 0;right: 0;height: 48px;background: white;display: flex;padding-bottom:env(safe-area-inset-bottom);}.tab-bar-border{background-color:rgba(0, 0, 0, 0.33);position: absolute;left: 0;top: 0;width: 100%;height: 1px;transform:scaleY(0.5);}.tab-bar-item{flex: 1;text-align: center;display: flex;justify-content: center;align-items: center;flex-direction: column;}.tab-bar-item .cover-image{width: 44rpx;height: 44rpx;}.tab-bar-item .cover-view{margin-top: 8rpx;font-size: 24rpx;}
custom-tab-bar/index.js
// custom-tab-bar/index.jsComponent({/**
* 组件的属性列表
*/properties:{},/**
* 组件的初始数据
*/data:{selectedColor:"#3161ff",allList:[[{"pagePath":"/pages/index/index","text":"检查","iconPath":"../assets/tabbar/check.png","selectedIconPath":"../assets/tabbar/check_select.jpg","selected":"index"},{"pagePath":"/pages/mine/index","text":"我的","iconPath":"../assets/tabbar/me.png","selectedIconPath":"../assets/tabbar/me_select.png","selected":"mine"}],[{"pagePath":"/pages/index/index","text":"检查","iconPath":"../assets/tabbar/check.png","selectedIconPath":"../assets/tabbar/check_select.jpg","selected":"index"},{"pagePath":"/pages/approval/index","text":"审批","iconPath":"../assets/tabbar/approval.png","selectedIconPath":"../assets/tabbar/approval_select.png","selected":"approval"},{"pagePath":"/pages/mine/index","text":"我的","iconPath":"../assets/tabbar/me.png","selectedIconPath":"../assets/tabbar/me_select.png","selected":"mine"}]],selectList:[]},/**
* 生命周期方法
*/attached(){this.setData({selectList:this.data.allList[1]})},/**
* 组件的方法列表
*/methods:{switchTab(e){// console.log(e.currentTarget.dataset);let path = e.currentTarget.dataset.path;let selected = e.currentTarget.dataset.selected
// console.log(e.currentTarget.dataset.selected);
wx.switchTab({url: path,})}}})
在每个Page的js文件中的onShow方法里,添加如下代码
pages\approval\index.js
onShow(){if(typeofthis.getTabBar ==='function'&&this.getTabBar()){this.getTabBar().setData({selected:"approval"})}},
以此类推
pages\index\index.js
onShow(){if(typeofthis.getTabBar ==='function'&&this.getTabBar()){this.getTabBar().setData({selected:"index"})}}
pages\mine\index.js
onShow(){if(typeofthis.getTabBar ==='function'&&this.getTabBar()){this.getTabBar().setData({selected:"mine"})}},
这里面selected的值对应的就是allLIst数组中的selected字段,选中哪个,哪个就会实现颜色改变切换。
解释说明
这里我们做的是自定义导航栏,所以在custom-tab-bar/index.wxml显示。
for循环的是选中的数组,渲染出该数组的image和文字
通过custom-tab-bar/index.js中attachec生命周期选中的selectList: this.data.allList[1]/selectList: this.data.allList[0]实现不同tabbar切换
的selected字段,选中哪个,哪个就会实现颜色改变切换。
解释说明
这里我们做的是自定义导航栏,所以在custom-tab-bar/index.wxml显示。
for循环的是选中的数组,渲染出该数组的image和文字
通过custom-tab-bar/index.js中attachec生命周期选中的selectList: this.data.allList[1]/selectList: this.data.allList[0]实现不同tabbar切换
因为这个是小demo还没做角色信息啥的,等真正做开发的时候就可以把获取过来的角色id进行判断,判断是渲染哪个list
版权归原作者 沐言鸭 所有, 如有侵权,请联系我们删除。