定制化Vue3气泡对话框：实现文字换行、图标设置、箭头调整

2023-11-10 21:59:45

我们先来介绍一下气泡对话框组件的核心代码：

<template>
  <div class="chat-dialog">
    <div class="dialog-wrapper">
      <div class="dialog-content">
        <p>{{ message }}</p>
      </div>
      <div class="dialog-icon" v-if="showIcon">
        <img :src="iconSrc" alt="icon" />
      </div>
      <div class="dialog-arrow" :class="arrowDirection" v-if="showArrow"></div>
    </div>
  </div>
</template>

<script>
import { ref } from 'vue'

export default {
  props: {
    message: {
      type: String,
      required: true
    },
    showIcon: {
      type: Boolean,
      default: false
    },
    iconSrc: {
      type: String,
      default: ''
    },
    showArrow: {
      type: Boolean,
      default: false
    },
    arrowDirection: {
      type: String,
      default: 'right'
    }
  },
  setup() {
    return {
      messageRef: ref(null)
    }
  },
  mounted() {
    this.adjustArrowPosition()
  },
  methods: {
    adjustArrowPosition() {
      const messageWidth = this.messageRef.current.offsetWidth
      const arrowWidth = this.$refs.dialogArrow.offsetWidth
      const dialogWidth = this.$refs.dialogWrapper.offsetWidth
      let arrowLeft = (dialogWidth - messageWidth - arrowWidth) / 2
      if (this.arrowDirection === 'left') {
        arrowLeft = -arrowWidth
      }
      this.$refs.dialogArrow.style.left = `${arrowLeft}px`
    }
  }
}
</script>

<style>
.chat-dialog {
  position: relative;
  width: 200px;
  height: 100px;
  padding: 10px;
  background-color: #efefef;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2);
}
.dialog-wrapper {
  display: flex;
  align-items: center;
}
.dialog-content {
  flex: 1;
  padding: 10px;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 5px;
  line-height: 1.5;
}
.dialog-icon {
  width: 24px;
  height: 24px;
  margin-right: 10px;
}
.dialog-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.dialog-arrow {
  position: absolute;
  width: 10px;
  height: 10px;
  background-color: #ccc;
  transform: rotate(45deg);
}
.dialog-arrow.left {
  left: -10px;
}
.dialog-arrow.right {
  right: -10px;
}
</style>

这个组件提供了丰富的属性，包括message（对话框内容）、showIcon（是否显示图标）、iconSrc（图标地址）、showArrow（是否显示箭头）、arrowDirection（箭头方向）。在组件内部，我们使用Vue3的响应式特性来动态控制这些属性，并在组件初始化时调整箭头的位置，确保箭头始终位于正确的位置。

接下来，让我们看看如何使用这个组件：

<template>
  <div>
    <ChatDialog message="你好，我是气泡对话框！" showIcon iconSrc="https://avatars.githubusercontent.com/u/3123951?v=4" showArrow arrowDirection="left" />
  </div>
</template>

<script>
import ChatDialog from './ChatDialog.vue'

export default {
  components: {
    ChatDialog
  }
}
</script>