---

11-购物车页面-确认框组件

目的：通过vue实例调用$confirm函数弹出确认框。import导入函数使用也需要支持。

大致步骤：

• 实现组件基础结构和样式。
• 实现函数式调用组件方式和完成交互。
• 加上打开时动画效果。
• 给购物车删除加上确认框。
• 给vue挂载原型函数$confirm。

落地代码：

• 实现组件基础结构和样式。

组件 src/components/library/xtx-confirm.vue

<template>
  <div class="xtx-confirm">
    <div class="wrapper">
      <div class="header">
        <h3>温馨提示</h3>
        <a href="JavaScript:;" class="iconfont icon-close-new"></a>
      </div>
      <div class="body">
        <i class="iconfont icon-warning"></i>
        <span>您确认从购物车删除该商品吗？</span>
      </div>
      <div class="footer">
        <XtxButton size="mini" type="gray">取消</XtxButton>
        <XtxButton size="mini" type="primary">确认</XtxButton>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  name: 'XtxConfirm'
}
</script>
<style scoped lang="less">
.xtx-confirm {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 8888;
  background: rgba(0,0,0,.5);
  .wrapper {
    width: 400px;
    background: #fff;
    border-radius: 4px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    .header,.footer {
      height: 50px;
      line-height: 50px;
      padding: 0 20px;
    }
    .body {
      padding: 20px 40px;
      font-size: 16px;
      .icon-warning {
        color: @priceColor;
        margin-right: 3px;
        font-size: 16px;
      }
    }
    .footer {
      text-align: right;
      .xtx-button {
        margin-left: 20px;
      }
    }
    .header {
      position: relative;
      h3 {
        font-weight: normal;
        font-size: 18px;
      }
      a {
        position: absolute;
        right: 15px;
        top: 15px;
        font-size: 20px;
        width: 20px;
        height: 20px;
        line-height: 20px;
        text-align: center;
        color: #999;
        &:hover {
          color: #666;
        }
      }
    }
  }
}
</style>

为了看到布局在购物车页面用下

• 实现函数式调用组件方式和完成交互。
  

定义函数 src/components/library/confirm.js

import { createVNode, render } from 'vue'
import XtxConfirm from './xtx-confirm'

// 准备div
const div = document.createElement('div')
div.setAttribute('class', 'xtx-confirm-container')
document.body.appendChild(div)

// 该函数渲染XtxConfirm组件，标题和文本
// 函数的返回值是promise对象
export default ({ title, text }) => {
  return new Promise((resolve, reject) => {
    const submitCallback = () => {
      render(null, div)
      resolve()
    }
    const cancelCallback = () => {
      render(null, div)
      reject(new Error('点击取消'))
    }
    // 1. 渲染组件
    // 2. 点击确认按钮，触发resolve同时销毁组件
    // 3. 点击取消按钮，触发reject同时销毁组件
    const vnode = createVNode(XtxConfirm, { title, text, submitCallback, cancelCallback })
    render(vnode, div)
  })
}

组件逻辑 src/components/library/xtx-confirm.vue

<template>
  <div class="xtx-confirm" :class="{fade}">
    <div class="wrapper"  :class="{fade}">
      <div class="header">
        <h3>{{title}}</h3>
        <a @click="cancelCallback()" href="JavaScript:;" class="iconfont icon-close-new"></a>
      </div>
      <div class="body">
        <i class="iconfont icon-warning"></i>
        <span>{{text}}</span>
      </div>
      <div class="footer">
        <XtxButton @click="cancelCallback()" size="mini" type="gray">取消</XtxButton>
        <XtxButton @click="submitCallback()" size="mini" type="primary">确认</XtxButton>
      </div>
    </div>
  </div>
</template>
<script>
// 当前组件不是在APP下进行渲染，无法使用APP下的环境（全局组件，全局指令，原型属性函数）
import XtxButton from '@/components/library/xtx-button'
import { onMounted, ref } from 'vue'
export default {
  name: 'XtxConfirm',
  components: { XtxButton },
  props: {
    title: {
      type: String,
      default: '温馨提示'
    },
    text: {
      type: String,
      default: ''
    },
    submitCallback: {
      type: Function
    },
    cancelCallback: {
      type: Function
    }
  },
  setup () {
    const fade = ref(false)
    onMounted(() => {
      // 当元素渲染完毕立即过渡的动画不会触发
      setTimeout(() => {
        fade.value = true
      }, 0)
    })
    return { fade }
  }
}
</script>
<style scoped lang="less">
.xtx-confirm {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 8888;
  background: rgba(0,0,0,0);
  &.fade {
    transition: all 0.4s;
    background: rgba(0,0,0,.5);
  }
  .wrapper {
    width: 400px;
    background: #fff;
    border-radius: 4px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-60%);
    opacity: 0;
    &.fade {
      transition: all 0.4s;
      transform: translate(-50%,-50%);
      opacity: 1;
    }
    .header,.footer {
      height: 50px;
      line-height: 50px;
      padding: 0 20px;
    }
    .body {
      padding: 20px 40px;
      font-size: 16px;
      .icon-warning {
        color: @priceColor;
        margin-right: 3px;
        font-size: 16px;
      }
    }
    .footer {
      text-align: right;
      .xtx-button {
        margin-left: 20px;
      }
    }
    .header {
      position: relative;
      h3 {
        font-weight: normal;
        font-size: 18px;
      }
      a {
        position: absolute;
        right: 15px;
        top: 15px;
        font-size: 20px;
        width: 20px;
        height: 20px;
        line-height: 20px;
        text-align: center;
        color: #999;
        &:hover {
          color: #666;
        }
      }
    }
  }
}
</style>

使用函数 src/views/cart/index.vue

    // 删除
    const deleteCart = (skuId) => {
      // store.dispatch('cart/deleteCart', skuId)
      Confirm({ text: '您确定从购物车删除该商品吗？' }).then(() => {
        console.log('点击确认')
      }).catch(e => {
        console.log('点击取消')
      })
    }
    return { checkOne, checkAll, deleteCart }

• 加上打开时动画效果。 src/components/library/xtx-confirm.vue

.xtx-confirm {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 8888;
+  background: rgba(0,0,0,0);
+  &.fade {
+    transition: all 0.4s;
+    background: rgba(0,0,0,.5);
+  }
  .wrapper {
    width: 400px;
    background: #fff;
    border-radius: 4px;
    position: absolute;
    top: 50%;
    left: 50%;
+    transform: translate(-50%,-60%);
+    opacity: 0;
+    &.fade {
+      transition: all 0.4s;
+      transform: translate(-50%,-50%);
+      opacity: 1;
+    }

给购物车删除加上确认框 src/views/cart/index.vue

    const deleteCart = (item) => {
      Confirm(app, { text: ' 您确认从购物车删除该商品吗？' }).then(() => {
        // console.log('点击确认')
        store.dispatch('cart/deleteCart', item.skuId)
      }).catch(e => {
        // console.log('点击取消')
      })

• 给vue挂载原型函数
  实现：src/components/library/index.js

import Confirm from './Confirm'

    // 如果你想挂载全局的属性，能够通过组件实例调用的属性   this.$message
    app.config.globalProperties.$message = Message
+    app.config.globalProperties.$confirm = Confirm

测试：

  mounted () {
    this.$confirm({ text: 'xxx' })
  },