由于项目中需要使用拖曳组件(需求:全局,跨组件,跨数据),我选择了react-dnd
React DnD 是一组 React 高阶组件,我们在使用的时候只需要将目标元素进行包裹,就可以实现目标元素具有拖动或接受拖动的功能。它将整个拖动的事件完整的描述了出来,这使得我们在使用的过程变得简单易用和扩展上有了无限的可能,在处理复杂拖曳和丰富需求的时候强烈建议使用它。
官网 https://react-dnd.github.io/react-dnd/
导入
npm install react-dnd react-dnd-html5-backend
初始化
import { HTML5Backend } from 'react-dnd-html5-backend';
....
>
组件参数type.ts
export type DragProps = {
name: string; //名称标记
type: string; //暂用于标记拖拽类型,接收者和发送者一致
role: string; //
data: any; //绑定的数据用于拖曳后操作数据
content: JSX.Element; //绑定的元素
onDragFinished: Function; //拖动结束回调.
};
export type AcceptorProps = {
name: string; //名称标记
type: string; //暂用于标记拖拽类型,接收者和发送者一致
role: string; //
data: any; //绑定的数据用于拖曳后操作数据
content: JSX.Element; //绑定的元素
styleType: 'background' | 'border';
// customStyle:{
// canDrop:string,
// isActive:string
// }
onHover: Function; //移入区域.
};
组件MyDrag.ts
import { useDrag, useDrop } from 'react-dnd';
import { DragProps, AcceptorProps } from './type';
export const Dragger = function Dragger(option: DragProps) {
const { name, data, type, onDragFinished } = option;
const [{ isDragging }, drag] = useDrag(() => ({
type: type,
item: { name: name, data: data },
end: (item, monitor, ...arg) => {
console.log(arg);
const dropResult = monitor.getDropResult();
if (item && dropResult) {
console.log('source:', item);
console.log('target:', dropResult);
}
if (onDragFinished) {
onDragFinished(item, dropResult);
}
},
collect: (monitor) => ({
isDragging: monitor.isDragging(),
handlerId: monitor.getHandlerId(),
}),
}));
const opacity = isDragging ? 0.4 : 1;
return (
{option.content}
);
};
export const Acceptor = (option: AcceptorProps) => {
const { name, data, type, styleType, onHover } = option;
const [{ canDrop, isOver }, drop] = useDrop(() => ({
accept: type,
drop: () => option,
hover: () => {
if (onHover) {
onHover();
}
},
collect: (monitor) => ({
isOver: monitor.isOver(),
canDrop: monitor.canDrop(),
}),
}));
const isActive = canDrop && isOver;
let backgroundColor = '#222';
let borderBottom = '0px solid rgba(31, 92, 206, 0)';
if (isActive) {
backgroundColor = 'rgba(64, 224, 208, 0.3)';
borderBottom = '1px solid #26BD11';
} else if (canDrop) {
backgroundColor = 'rgba(100, 149, 277, 0.3)';
borderBottom = '1px solid #2063AF';
}
return (
{option.content}
);
};
//同一list之间拖动
export const dragList = (
list: Array,
crtIndex: number,
willIndex: number,
) => {
let targetItem = list[crtIndex];
let delIndex = crtIndex < willIndex ? crtIndex : crtIndex + 1;
list.splice(willIndex, 0, targetItem);
list.splice(delIndex, 1);
return list;
};
//来自不同list之间拖动,1.删除原来 2不删除原来
export const dragToList = (
list: Array,
targetList: Array,
crtIndex: number,
willIndex: number,
del: 1 | 2,
) => {
let targetItem = list[crtIndex];
targetList.splice(willIndex, 0, targetItem);
if (del === 1) {
list.splice(crtIndex, 1);
}
return { list, targetList };
};
具体使用
import { Dragger, Acceptor, dragList } from '@/components/Drag';
//同列表之间拖曳
handleDrag(crt: number, target: number) {
conslog.log(dragList(newPanels, crt, target);)
}
renderDrag(item: ItemProps, children) {
{}}
content={
{
console.log(source, target, '回调');
if (target) {
this.handleDrag(
source.data.sort,
target.data.sort,
);
}
}}
/>
}
styleType="border"
/>
}