最近項目中要做一個拖動排序功能，首先想到的是之前項目中用過的antd自帶的tree和table的拖動排序，但是只能在對應的組建里使用。這里用的是自定義組件，隨意拖動排序，所以記錄一下實現流程

react-dnd antd組件的拖動排序都是用的這個庫，使用比較靈活，但是要配置的東西比較多，需求復雜時使用這個庫；class BodyRow extends React.Component { render() { const { isOver, connectDragSource, connectDropTarget, moveRow, ...restProps } = this.props; const style = { ...restProps.style, cursor: 'move' }; let { className } = restProps; if (isOver) { if (restProps.index > dragingIndex) {className += ' drop-over-downward'; } if (restProps.index < dragingIndex) {className += ' drop-over-upward'; } } return connectDragSource( connectDropTarget(<tr {...restProps} className={className} style={style} />), ); }}const rowSource = { beginDrag(props) { dragingIndex = props.index; return { index: props.index, }; },};const rowTarget = { drop(props, monitor) { const dragIndex = monitor.getItem().index; const hoverIndex = props.index; // Don't replace items with themselves if (dragIndex === hoverIndex) { return; } // Time to actually perform the action props.moveRow(dragIndex, hoverIndex); // Note: we're mutating the monitor item here! // Generally it's better to avoid mutations, // but it's good here for the sake of performance // to avoid expensive index searches. monitor.getItem().index = hoverIndex; },};const DragableBodyRow = DropTarget('row', rowTarget, (connect, monitor) => ({ connectDropTarget: connect.dropTarget(), isOver: monitor.isOver(),}))( DragSource('row', rowSource, connect => ({ connectDragSource: connect.dragSource(), }))(BodyRow),);<DndProvider backend={HTML5Backend}> <Table columns={columns} dataSource={this.state.data} components={this.components} onRow={(record, index) => ({ index, moveRow: this.moveRow, })} /></DndProvider>react-beautiful-dnd 在項目中看到引用了這個庫，使用起來也不算復雜，就試著用了這個庫，不過只支持水平或垂直拖動，一行或者一列元素時可以使用，可惜這個需求時兩行多列元素，也沒辦法用；<DragDropContext onDragEnd={this.onDragEnd}> <Droppable droppableId='phone-droppable'> {droppableProvided => ( <div ref={droppableProvided.innerRef} {...droppableProvided.droppableProps}>{this.state.phoneImages.map((image, index) => ( <Draggable key={image||'upload'} draggableId={image||'upload'} index={index}> {(provided, snapshot) => ( <divref={provided.innerRef}{...provided.draggableProps}{...provided.dragHandleProps}style={{ ...provided.draggableProps.style, opacity: snapshot.isDragging ? 0.8 : 1, display: 'inline-block'}} ><img src={img}/> </div> )} </Draggable>))}{droppableProvided.placeholder} </div> )} </Droppable></DragDropContext>react-sortable-hoc 最后在網上搜索的時候，又看到這個庫，使用起來比較簡單，使用SortableList包裹要拖拽元素的容器，SortableElement包裹要拖拽的子元素，設置容器拖拽方向axis={'xy'}即可使grid布局的多個元素支持水平和豎直方向拖動排序；const SortableItem = SortableElement(({children}) => ( <div>{children}</div>));const SortableList = SortableContainer(({children}) => { return ( <div style={{display: 'grid', gridTemplateRows: '117px 117px', gridTemplateColumns: '120px 120px 120px 120px'}}> {children} </div> );});<SortableList onSortEnd={this.onPadSortEnd} helperClass={Styles.sortableHelper} axis={'xy'}> {this.state.padImages.map((image, index) => ( <SortableItem key={`pad-item-${index}`} index={index} className={Styles.sortableItem}> <img src={img}/> </SortableItem> ))}</SortableList>

好久沒更新博客了，最近工作比較忙，差不多每天都要加班，中間有經歷搬家，沒時間坐下來總結學到的東西。工作的時候因為這塊花費了一些時間，想到可能別人也會遇到類似問題，所以就記錄下來了

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