微信小程序自定义组件Component的代码详解

"usingComponents": {
"item":"/components/item/item"
}

<item></item>

<view class="cell cell-class">
</view>

.cell{
  color: tomato;
}
.mycell{
  color: #f70;
  line-height: 120rpx !important;
}

  
  options:{
    
    styleIsolation:'isolated',
  },
  //通过组件的外部类实现父组件控制自己的样式
  externalClasses:["cell-class"],

<cell></cell>
<cell cell-class="mycell"></cell>

 <view class="cell">
  我是cell组件
  <slot></slot>
</view>

  
  options:{
    //允许多个插槽
    multipleSlots:true,
  },

.cell{
  height: 88rpx;
  line-height: 88rpx;
  border-bottom: 1rpx solid #cccccc;
}

<cell>
  <text>放假</text>
  <text>快点到来</text>
</cell>

 <view class="cell cell-class">
  <slot name="pre"></slot>
  我是cell组件
  <slot></slot>
  <slot name="next"></slot>
</view>

  
  options:{
    //允许多个插槽
    multipleSlots:true,
  },

.cell{
  height: 88rpx;
  line-height: 88rpx;
  border-bottom: 1rpx solid #cccccc;
}

<!-- 插槽 -->
<cell>
  <text slot="pre">?‍?</text>
  <text slot="next">?‍?</text>
  <text>放假</text>
  <text>快点到来</text>
</cell>
<cell cell-class="mycell">
  <text slot="next">?</text>
  <text slot="pre">?‍</text>
  <text>做核酸</text>
  <text>今天要做</text>
</cell>

<view class="cell">
  <text>{{title}}</text>
  <text>{{num}}</text>
</view>

// components/cell/cell.js
Component({
  
  options:{
    
    styleIsolation:'isolated',
    //允许多个插槽
    multipleSlots:true,
  },
  
  properties: {
    title:{
      type:String,
      value:""
    },
    num:{
      type:Number,
      value:1
    }
  },

  
  data: {
    //定义组件自己的数据count
    count:1
  },
  
})

<cell title="做核酸" num="{{5}}"></cell>
<cell title="烦呐"></cell> 

<view class="cell" bindtap="tapHd">
  <text>{{title}}</text>
  <text>{{count}}</text>
</view>

// components/cell/cell.js
Component({
  
  options:{
    
    styleIsolation:'isolated',
    //允许多个插槽
    multipleSlots:true,
  },
  
  properties: {
    title:{
      type:String,
      value:""
    },
    num:{
      type:Number,
      value:1
    }
  },

  
  data: {
    //定义组件自己的数据count
    count:1
  },
  lifetimes:{
    //在组件生命周期attached挂载更新count
    attached(){
      console.log(this.data);
      //count 的值为父组件传递的num值
      this.setData({count:this.data.num})
    }

  },
  
  methods: {
    tapHd(){
      this.setData({count:this.data.count+5})
      //发送一个事件
      this.triggerEvent("cellclick",this.data.count)
    }
  }
})

 <view class="cell" bindtap="tapHd">
  <text>{{title}}</text>
  <text>{{count}}</text>
</view> 

<!--components/item/item.wxml-->
<navigator class="item itemclass" url="{{url}}" open-type="{{openType}}" bindtap="itemclick">
  <view class="icon" wx:if="{{icon}}">
    <image src="{{icon}}" mode="aspectFill"/>
  </view>
  <view class="content">
    <view class="title" wx:if="{{title}}">
      {{title}}
    </view>
    <slot name="title" wx:else ></slot>
    <view class="right" wx:if="{{!showrslot}}">
      <view class="tip">{{tip}}</view>
      <view class="badge" wx:if="{{badge}}">
      <view wx:if="{{badge===true}}" class="dot">  </view>
        <view wx:else class="redbadge">{{badge}}</view> 
      </view>
      <view class="arrow"></view>
    </view>
    <slot name="right" wx:else></slot>
  </view>
</navigator>

.item{
  line-height: 88rpx;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.icon{
  margin-left: 30rpx;
  margin-right: 30rpx;
  height: 100%;
  display: flex;
  align-items: center;
}
.icon image{
  width: 60rpx;
  height: 60rpx;
}
.content{
  padding: 0 30rpx;
  border-bottom: 1rpx solid #ccc;
  display: flex;
  flex: 1;
}
.title{
  flex: 1;
  color: #333;
  font-size: 35rpx;
}
.right{
  display: flex;
  align-items: center;
}
.right .arrow{
  height: 25rpx;
  width: 25rpx;
  border-top: 3rpx solid #999;
  border-right: 3rpx solid #999;
  transfORM: rotate(45deg);
}
.tip{
  color: #999;
  font-size: 28rpx;
}
.dot{
  height: 15rpx;
  width: 15rpx;
  background-color: #f30;
  margin-left: 15rpx;
  border-radius: 50%;
}
.redbadge{
  font-size: 20rpx;
  padding: 5rpx;
  background-color: #f30;
  width: 30rpx;
  max-height: 30rpx;
  line-height: 30rpx;
  color: #fff;
  text-align: center;
  margin-left: 15rpx;
  border-radius: 20rpx;
}

<!-- 引用组件的json文件 -->
{
  "usingComponents": {
    "cell": "/components/cell/cell"
  }
}

<!-- 引用组件的wxml文件 -->
<!--pages/component/component.wxml-->
<item title="支付" icon="/images/icon01.png"></item>
<item title="相册" icon="/images/icon02.png"></item>
<item title="设置" ></item>
<item title="朋友圈" icon="/images/icon03.png" badge="{{true}}" tip="10条消息未读"></item>
<item title="卡包" icon="/images/icon04.png" badge="{{12}}" tip="12条消息未读"></item>
<item title="服务" icon="/images/icon05.png" showrslot="{{true}}">
  <switch checked="true" slot="right" />
</item>
<item>
<view slot="title">插槽title</view>
</item>
<item title="新闻" icon="/images/icon07.png" url="/pages/index/index" open-type="switchTab"></item>
<item title="life" icon="/images/icon08.png" url="/pages/life/life" ></item>

<item title="消息" icon="/images/icon06.png" showrslot="{{true}}" itemclass="myitem">
  <switch checked="true" slot="right" />
</item>

.myitem{
  line-height: 120rpx !important;
  background-color: #f0f0f0;
}