小程序自定义导航条

小程序自定义导航条

主要思路将自带的关闭，自己编写一个，因为用自带的可控性查，就自己写一个吧，查了百度，写下来这算是一个比较完整的答案了

1.首先在app.json中将navigationStyle设置为“custom”，并且定义一个组件navbar

{

  "pages":[

    

  ],

  "usingComponents": {

    "navbar": "/pages/navbar/navbar"

  },

  "window":{

    "backgroundTextStyle":"light",

    "navigationBarBackgroundColor": "#77d5fb",

    "navigationBarTextStyle":"white",

    "navigationStyle":"custom"

  },

  "style": "v2",

  "sitemapLocation": "sitemap.json"

}

2.接着在app.js中获取导航的高度

  onLaunch: function () {

　　wx.getSystemInfo({
      success: res => {
        //导航高度
        this.globalData.navHeight = res.statusBarHeight;
      }, fail(err) {
        console.log(err);
      }
　　})
}

3.接着再创建一个共用的navbar导航条

 navbar.wxml 图片路径换下就可以

<view class="navbar" style="{{'height: ' + navigationBarHeight}}">
  <view style="{{'height: ' + statusBarHeight}}"></view>
  <view class='title-container'>
    <view class='capsule' wx:if="{{ back || home }}">
      <view bindtap='back' wx:if="{{back}}">
        <image src='../../images/back.png'></image>         
      </view>
      <view bindtap='backHome' wx:if="{{home}}" block="{{true}}">
        <image src='../../images/home.png'></image>
      </view>
    </view>
    <view class='title'>{{text}}</view>
  </view>
</view> 
<view style="{{'height: ' + navigationBarHeight}};background: white;"></view>

 navbar.wxss

.navbar {
   100%;
  background-color: #1797eb;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
}
.title-container {
  height: 40px;
  display: flex;
  align-items: center;
  position: relative;
}
.capsule {
  margin-left: 10px;
  height: 30px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid #fff;
  border-radius: 16px;
  display: flex;
  align-items: center;
}
.capsule > view {
   45px;
  height: 60%;
  position: relative;
}
.capsule > view:nth-child(2) {
  border-left: 1px solid #fff;  
}
.capsule image {
   50%;
  height: 100%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
}
.title {
  color: white;
  position: absolute;
  top: 6px;
  left: 104px;
  right: 104px;
  height: 30px;
  line-height: 30px;
  font-size: 14px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

navbar.js     

navigationBarHeight：是导航条的总高度

statusBarHeight：是只有最上面一条的高度

text：前台传值格式text="标题"

back：返回上级，前台传值格式back="{{false}}"

home：返回首页，前台传值格式home="{{false}}"

const app = getApp()

Component({
  properties: {
    text:String,
    back: {
      type: Boolean,
      value: true
    },
    home: {
      type: Boolean,
      value: true
    }
  },
  data: {
    statusBarHeight: app.globalData.navHeight + 'px',
    navigationBarHeight: (app.globalData.navHeight + 44) + 'px'
  },

  methods: {
    backHome: function () {
      wx.navigateTo({
        url: '/pages/index/index'
      })
    },
    back: function () {
        wx.navigateBack({
          delta: 1
        })      
    }
  }
})

navbar.json

{
  "usingComponents": {}
}

4.引用导航条,放在页面顶部就行

<navbar text="大客车" back="{{false}}"></navbar>

　<view class='page-content'>

　</view>

参考链接：https://www.cnblogs.com/fundebug/p/customize-wechat-miniprogram-navigation.html