antd vue 的 a-modal 不可拖拽,定义一个 vue 指令 v-drag-modal
,使用户可以通过头部拖拽弹窗,内容区不可拖拽。
效果演示
调用示例
<a-modal v-drag-modal title="弹窗" v-model="isShow">
...
</a-modal>
指令代码
新建一个 js 文件 utils/dragModal.js,代码如下:
import Vue from 'vue'
// 注册自定义拖拽指令,弥补 modal 组件不能拖动的缺陷
Vue.directive('drag-modal', (el, bindings, vnode) => {
Vue.nextTick(() => {
const { visible, destroyOnClose } = vnode.componentInstance
// 防止未定义 destroyOnClose 关闭弹窗时dom未被销毁,指令被重复调用
if (!visible) return
const modal = el.getElementsByClassName('ant-modal')[0]
const header = el.getElementsByClassName('ant-modal-header')[0]
let left = 0
let top = 0
// 鼠标变成可移动的指示
header.style.cursor = 'move'
// 未定义 destroyOnClose 时,dom未被销毁,关闭弹窗再次打开,弹窗会停留在上一次拖动的位置
if (!destroyOnClose) {
left = modal.left || 0
top = modal.top || 0
}
// top 初始值为 offsetTop
top = top || modal.offsetTop
header.onmousedown = e => {
const startX = e.clientX
const startY = e.clientY
header.left = header.offsetLeft
header.top = header.offsetTop
el.onmousemove = event => {
const endX = event.clientX
const endY = event.clientY
modal.left = header.left + (endX - startX) + left
modal.top = header.top + (endY - startY) + top
modal.style.left = modal.left + 'px'
modal.style.top = modal.top + 'px'
}
el.onmouseup = event => {
left = modal.left
top = modal.top
el.onmousemove = null
el.onmouseup = null
header.releaseCapture && header.releaseCapture()
}
header.setCapture && header.setCapture()
}
})
})
在 main.js 中引入:
import './utils/dragModal'
原文链接:https://blog.csdn.net/baidu_20264113/article/details/113058067
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