微信小程序自定义导航栏（wx_custom_navigation_bar） 自定义返回键、首页键，动态设置标题，响应式组件 微信小程序自定义导航栏 navigation bar 返回键 首页

<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='img/back.svg'></image>            
      </view>
      <view bindtap='backHome' wx:if="{{home}}">
        <image src='img/home.svg'></image>
      </view>
    </view>
    <view class='title'>{{text}}</view>
  </view>
</view>

.navbar {
   100vw;
  background-color: #2f2f2f;
  position: fixed;
  z-index: 4;
}

.title-container {
  height: 44px;
  display: flex;
  align-items: center;
  position: relative;
}

.capsule {
  margin-left: 10px;
  height: 32px;
  border: 1px solid #777;
  border-radius: 16px;
  display: flex;
  align-items: center;
}

.capsule > view {
   32px;
  height: 60%;
  position: relative;
}

.capsule > view:nth-child(2) {
  border-left: 1px solid #777;  
}

.capsule image {
   60%;
  height: 100%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
}

.title {
  color: white;
  position: absolute;
  left: 104px;
  right: 104px;
  font-size: 14px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

const app = getApp()

Component({

  properties: {
    text: {
      type: String,
      value: 'Wechat'
    },
    back: {
      type: Boolean,
      value: false
    },
    home: {
      type: Boolean,
      value: false
    }
  },

  data: {
    statusBarHeight: app.statusBarHeight + 'px',
    navigationBarHeight: (app.statusBarHeight + 44) + 'px'
  },

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

{
  "component": true
}