微信小程序自定义特殊凸起tabbar
效果图:
描述:
实现自定义的tab栏,点击 【教辅】、【我的】就切换tab,底部还会显示tabBar,但是点击中间的【福】,需要跳到新的页面。
坑1:
(1)在custom-tab-bar/index里面是无法wx.navigateTo跳转的,只能使用switchTab。那么我们的【福】要怎样跳转呢。在app.json里面的tabbar 里面的list里去掉关于【福】的相关pagePath等配置。
相关代码如下:
(1)在根目录下新建文件:
custom-tab-bar/index.jscustom-tab-bar/index.json
custom-tab-bar/index.wxml
custom-tab-bar/index.wxss
(2)在app.json
里面配置:
"tabBar": { "custom": true, // 自定义的,必须设置奥
"color": "#7A7E83",
"selectedColor": "#3cc51f",
"borderStyle": "black",
"backgroundColor": "#ffffff",
"list": [
{
"pagePath": "pages/bar/teach/teach-assistant",
"text": "教辅"
},
{
"pagePath": "pages/bar/my/my",
"text": "我的"
}
]
(3)自定义的tabBar custom-tab-bar/index.js
Component({ data: {
selected: 0,
color: "#7A7E83",
selectedColor: "#666666",
fontWeight:'bold',
list: [
{
pagePath: "/pages/bar/teach/teach-assistant",
text: "教辅",
isSpecial:false
},
{
pagePath: "/pages/bar/bless/bless",
iconPath: "/images/icon/fu.png",
selectedIconPath: "/images/icon/fu.png",
text: "",
isSpecial: true
},
{
pagePath: "/pages/bar/my/my",
text: "我的",
isSpecial: false
}
]
},
attached() {
},
methods: {
switchTab(e) {
const idx = e.currentTarget.dataset.index
const path = e.currentTarget.dataset.path
this.setData({
selected: idx
})
if (this.data.list[idx].isSpecial){
wx.navigateTo({
url: path,
})
console.log(path)
}else{
wx.switchTab({
url: path,
})
}
console.log(this.data.selected, idx);
}
}
})
自定义的tabBar custom-tab-bar/index.json
{ "component": true
}
自定义的tabBar custom-tab-bar/index.wxml
<!-- 自定义tab --><view class="tab-bar">
<view wx:for="{{list}}" wx:key="index" class="tab-bar-item" data-path="{{item.pagePath}}" data-index="{{index}}" bindtap="switchTab">
<view class="center_part" wx:if="{{item.iconPath}}">
<image class="center_img center-has-noimg" src="../images/icon/fu-top.png"></image>
<image class="center_img center-has-image" src="{{item.iconPath}}"></image>
</view>
<view class="txt fontWeight" wx:if="{{selected === index}}" style="color: {{selected === index ?selectedColor : color}}">
{{item.text}}
<view class="bg_rec"></view>
</view>
<view class="txt" wx:if="{{selected != index}}">{{item.text}}</view>
</view>
</view>
自定义的tabBar custom-tab-bar/index.wxss
.tab-bar { position: fixed;
bottom: 0;
left: 0;
right: 0;
height: 150rpx;
background: white;
display: flex;
padding-bottom: env(safe-area-inset-bottom);
border-radius: 30rpx 30rpx 0 0;
border-top: 1px solid #eaeaea;
z-index: -1;
}
.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: 27px;
height: 27px;
}
.tab-bar-item cover-view {
font-size: 10px;
}
.txt{
font-size: 40rpx;
color: #aaaaaa;
}
.fontWeight{
font-weight: bold;
}
.bg_rec{
background: #ffd324;
width: 80rpx;
min-height: auto;
height: 20rpx;
margin-top: -28rpx;
vertical-align: text-bottom;
border-radius: 0;
z-index: -10;
}
.center_img{
width: 120rpx;
height: 120rpx;
position: fixed;
transform: translate(-50%);
left: 50%;
bottom:0;
}
.center-has-noimg{
bottom: 26px;
z-index: 10;
}
.center-has-image{
bottom: 20px;
z-index: 11;
}
(4)在tabBar跳转的页面,也就是tab 选中状态下,要在当前页面下,通过 getTabBar
接口获取组件实例,并调用 setData
更新选中态。
const app = getApp()Page({
data: {
},
onShow(){
if (typeof this.getTabBar === 'function' &&
this.getTabBar()) {
this.getTabBar().setData({
selected: 2 // 根据tab的索引值设置
})
}
}
})
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