vue实现对话框效果

使用 Vue 实现对话框效果

对话框组件基础实现

创建对话框组件 Dialog.vue，包含模板、样式和逻辑：

<template>
  <div class="dialog-overlay" v-if="visible" @click.self="close">
    <div class="dialog-content">
      <slot name="header">
        <h3>{{ title }}</h3>
      </slot>
      <slot></slot>
      <div class="dialog-footer">
        <button @click="close">取消</button>
        <button @click="confirm">确认</button>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  props: {
    visible: Boolean,
    title: {
      type: String,
      default: '提示'
    }
  },
  methods: {
    close() {
      this.$emit('update:visible', false)
    },
    confirm() {
      this.$emit('confirm')
      this.close()
    }
  }
}
</script>

<style scoped>
.dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.dialog-content {
  background: white;
  padding: 20px;
  border-radius: 4px;
  min-width: 300px;
}

.dialog-footer {
  margin-top: 20px;
  text-align: right;
}
</style>

在父组件中使用对话框

<template>
  <div>
    <button @click="showDialog = true">打开对话框</button>
    <Dialog 
      v-model:visible="showDialog"
      title="自定义标题"
      @confirm="handleConfirm"
    >
      <p>这是对话框的内容</p>
    </Dialog>
  </div>
</template>

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

export default {
  components: { Dialog },
  data() {
    return {
      showDialog: false
    }
  },
  methods: {
    handleConfirm() {
      console.log('确认操作')
    }
  }
}
</script>

使用 Vue Teleport 优化对话框

Vue 3 中可以使用 Teleport 将对话框渲染到 body 下，避免样式问题：

<template>
  <Teleport to="body">
    <div class="dialog-overlay" v-if="visible" @click.self="close">
      <!-- 其余代码保持不变 -->
    </div>
  </Teleport>
</template>

添加动画效果

为对话框添加淡入淡出和缩放动画：

<template>
  <Teleport to="body">
    <Transition name="dialog">
      <div class="dialog-overlay" v-if="visible" @click.self="close">
        <div class="dialog-content">
          <!-- 内容保持不变 -->
        </div>
      </div>
    </Transition>
  </Teleport>
</template>

<style scoped>
.dialog-enter-active,
.dialog-leave-active {
  transition: opacity 0.3s ease;
}

.dialog-enter-from,
.dialog-leave-to {
  opacity: 0;
}

.dialog-enter-active .dialog-content,
.dialog-leave-active .dialog-content {
  transition: transform 0.3s ease;
}

.dialog-enter-from .dialog-content,
.dialog-leave-to .dialog-content {
  transform: scale(0.9);
}
</style>

使用 Composition API 重构

Vue 3 的 Composition API 版本：

<script setup>
import { defineProps, defineEmits } from 'vue'

const props = defineProps({
  visible: Boolean,
  title: {
    type: String,
    default: '提示'
  }
})

const emits = defineEmits(['update:visible', 'confirm'])

const close = () => {
  emits('update:visible', false)
}

const confirm = () => {
  emits('confirm')
  close()
}
</script>

对话框扩展功能

1. 自定义按钮文本：

   <Dialog 
   cancelText="关闭"
   confirmText="确定"
   />

2. 禁用确认按钮：

   <Dialog 
   :confirmDisabled="true"
   />

3. 异步操作：

   

   methods: {
   async handleConfirm() {
    try {
      await someAsyncOperation()
      this.showDialog = false
    } catch (error) {
      console.error(error)
    }
   }
   }