效果图：

github下载地址：DHDragableCellTableView

使用

将tableView继承与DHDragableCellTableView并遵循协议DHDragableCellTableViewDataSource,DHDragableCellTableViewDelegate

#pragma mark - DHDragableCellTableViewDataSource- (NSArray *)dataSourceArrayInTableView:(DHDragableCellTableView *)tableView{    return self.dataSource.copy;//数据源}

- (void)tableView:(DHDragableCellTableView *)tableView newDataSourceArrayAfterMove:(NSArray *)newDataSourceArray{    self.dataSource = newDataSourceArray.mutableCopy;//返回的数据源    [self.tableView reloadData];}复制代码

实现：

大概思路，为UITableView添加长按手势，长按后给选择的cell截图并隐藏选择的cell,让截图跟随手势移动

1.添加手势

/** 添加手势 */- (void)dh_addGesture{    _gesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(dh_processGesture:)];    _gesture.minimumPressDuration = _gestureMinimumPressDuration;    [self addGestureRecognizer:_gesture];}复制代码

2.监听手势状态

- (void)dh_processGesture:(UILongPressGestureRecognizer *)gesture{    switch (gesture.state) {        case UIGestureRecognizerStateBegan:        {            [self dh_gestureBegan:gesture];        }            break;        case UIGestureRecognizerStateChanged:        {            if (!_canEdgeScroll) {                [self dh_gestureChanged:gesture];            }        }            break;        case UIGestureRecognizerStateEnded:        case UIGestureRecognizerStateCancelled:        {            [self dh_gestureEndedOrCancelled:gesture];        }            break;        default:            break;    }}复制代码

3.开始拖动

- (void)dh_gestureBegan:(UILongPressGestureRecognizer *)gesture{    CGPoint point = [gesture locationInView:gesture.view];    self.lastPoint = point;    NSIndexPath *selectedIndexPath = [self indexPathForRowAtPoint:point];    if (!selectedIndexPath) {        return;    }    if (self.delegate && [self.delegate respondsToSelector:@selector(tableView:willMoveCellAtIndexPath:)]) {        [self.delegate tableView:self willMoveCellAtIndexPath:selectedIndexPath];    }    if (_canEdgeScroll) {        //开启边缘滚动        [self dh_startEdgeScroll];    }    //每次移动开始获取一次数据源    if (self.dataSource && [self.dataSource respondsToSelector:@selector(dataSourceArrayInTableView:)]) {        _tempDataSource = [self.dataSource dataSourceArrayInTableView:self].mutableCopy;    }    _selectedIndexPath = selectedIndexPath;    UITableViewCell *cell = [self cellForRowAtIndexPath:selectedIndexPath];    _tempView = [self dh_snapshotViewWithInputView:cell];    if (_drawMovalbeCellBlock) {        //将_tempView通过block让使用者自定义        _drawMovalbeCellBlock(_tempView);    }else {        //配置默认样式        _tempView.layer.shadowColor = [UIColor grayColor].CGColor;        _tempView.layer.masksToBounds = NO;        _tempView.layer.cornerRadius = 0;        _tempView.layer.shadowOffset = CGSizeMake(-5, 0);        _tempView.layer.shadowOpacity = 0.4;        _tempView.layer.shadowRadius = 5;    }    _tempView.frame = cell.frame;    [self addSubview:_tempView];    //隐藏cell    cell.hidden = YES;    [UIView animateWithDuration:kDH_DragableCellAnimationTime animations:^{        _tempView.center = CGPointMake(_tempView.center.x, point.y);    }];}复制代码

4.拖动 这里的_toBottom是int类型用来判断手势是向哪一个方向拖动，然后根据拖动的cell跟要交换的cell的中心点进行比较，判断是否交换

- (void)dh_gestureChanged:(UILongPressGestureRecognizer *)gesture{    CGPoint point = [gesture locationInView:gesture.view];    //判断拖动的方向    if (point.y - self.lastPoint.y > 0) {        _toBottom = 1;//向下拖    }else if(point.y - self.lastPoint.y < 0){        _toBottom = -1;//向上拖    }else{        _toBottom = 0;    }    self.lastPoint = point;    NSIndexPath *currentIndexPath = [self indexPathForRowAtPoint:point];    if (currentIndexPath && ![_selectedIndexPath isEqual:currentIndexPath]) {        UITableViewCell *cell = [self cellForRowAtIndexPath:_selectedIndexPath];        UITableViewCell *cell1 = [self cellForRowAtIndexPath:currentIndexPath];        //将拖动的cell跟要交换的cell的centerY进行比较        if ((_toBottom == 1 && (point.y+cell.frame.size.height/2) >= CGRectGetMaxY(cell1.frame) && (CGRectGetMaxY(cell1.frame) >= CGRectGetMaxY(cell.frame))) || ((_toBottom == -1 && (point.y-cell.frame.size.height/2) <= CGRectGetMinY(cell1.frame)) && (CGRectGetMinY(cell1.frame) <= CGRectGetMinY(cell.frame)))) {            //交换数据源和cell            [self dh_updateDataSourceAndCellFromIndexPath:_selectedIndexPath toIndexPath:currentIndexPath];            if (self.delegate && [self.delegate respondsToSelector:@selector(tableView:didMoveCellFromIndexPath:toIndexPath:)]) {                [self.delegate tableView:self didMoveCellFromIndexPath:_selectedIndexPath toIndexPath:currentIndexPath];            }            _selectedIndexPath = currentIndexPath;        }    }    //让截图跟随手势    _tempView.center = CGPointMake(_tempView.center.x, point.y);}复制代码

5.交换数据跟cell的位置 为了在不同行高交换时cell不变形，交换后要立刻reloadData，再通过对两个cell截图，用截图来模拟交换的动画

/**交换数据源 跟 cell的位置*/
- (void)dh_updateDataSourceAndCellFromIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{if ([self numberOfSections] == 1) {//只有一组[_tempDataSource exchangeObjectAtIndex:fromIndexPath.row withObjectAtIndex:toIndexPath.row];//交换cell[self moveRowAtIndexPath:fromIndexPath toIndexPath:toIndexPath];}else {//有多组id fromData = _tempDataSource[fromIndexPath.section][fromIndexPath.row];id toData = _tempDataSource[toIndexPath.section][toIndexPath.row];NSMutableArray *fromArray = [_tempDataSource[fromIndexPath.section] mutableCopy];NSMutableArray *toArray = [_tempDataSource[toIndexPath.section] mutableCopy];[fromArray replaceObjectAtIndex:fromIndexPath.row withObject:toData];[toArray replaceObjectAtIndex:toIndexPath.row withObject:fromData];[_tempDataSource replaceObjectAtIndex:fromIndexPath.section withObject:fromArray];[_tempDataSource replaceObjectAtIndex:toIndexPath.section withObject:toArray];//交换cell[self beginUpdates];[self moveRowAtIndexPath:fromIndexPath toIndexPath:toIndexPath];[self moveRowAtIndexPath:toIndexPath toIndexPath:fromIndexPath];[self endUpdates];}//交换数据源后reloadData[self reloadData];//返回交换后的数据源if (self.dataSource && [self.dataSource respondsToSelector:@selector(tableView:newDataSourceArrayAfterMove:)]) {[self.dataSource tableView:self newDataSourceArrayAfterMove:_tempDataSource.copy];}//此处用两个cell的截图实现交换的动画UITableViewCell *cell = [self cellForRowAtIndexPath:fromIndexPath];cell.hidden = NO;UITableViewCell *cell1 = [self cellForRowAtIndexPath:toIndexPath];cell1.hidden = YES;UIView *tmpCell = [self dh_snapshotViewWithInputView:cell];cell.hidden = YES;tmpCell.frame = cell1.frame;if (_toBottom == -1) {//向上tmpCell.frame = CGRectMake(0, CGRectGetMinY(cell1.frame), cell.frame.size.width, cell.frame.size.height);[self insertSubview:tmpCell belowSubview:_tempView];}else if (_toBottom == 1) {//向下tmpCell.frame = CGRectMake(0, CGRectGetMaxY(cell1.frame)-cell.frame.size.height, cell.frame.size.width, cell.frame.size.height);[self insertSubview:tmpCell belowSubview:_tempView];}else{}[UIView animateWithDuration:0.2 animations:^{tmpCell.frame = cell.frame;}completion:^(BOOL finished) {cell.hidden = NO;[tmpCell removeFromSuperview];}];
}
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6.边缘滚动处理

- (void)dh_startEdgeScroll{    _edgeScrollTimer = [CADisplayLink displayLinkWithTarget:self selector:@selector(dh_processEdgeScroll)];    [_edgeScrollTimer addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];}

- (void)dh_processEdgeScroll{    [self dh_gestureChanged:_gesture];    CGFloat minOffsetY = self.contentOffset.y + _edgeScrollRange;    CGFloat maxOffsetY = self.contentOffset.y + self.bounds.size.height - _edgeScrollRange;    CGPoint touchPoint = _tempView.center;    //处理上下达到极限之后不再滚动tableView，其中处理了滚动到最边缘的时候，当前处于edgeScrollRange内，但是tableView还未显示完，需要显示完tableView才停止滚动    if (touchPoint.y < _edgeScrollRange) {        if (self.contentOffset.y <= 0) {            return;        }else {            if (self.contentOffset.y - 1 < 0) {                return;            }            [self setContentOffset:CGPointMake(self.contentOffset.x, self.contentOffset.y - 1) animated:NO];            _tempView.center = CGPointMake(_tempView.center.x, _tempView.center.y - 1);        }    }    if (touchPoint.y > self.contentSize.height - _edgeScrollRange) {        if (self.contentOffset.y >= self.contentSize.height - self.bounds.size.height) {            return;        }else {            if (self.contentOffset.y + 1 > self.contentSize.height - self.bounds.size.height) {                return;            }            [self setContentOffset:CGPointMake(self.contentOffset.x, self.contentOffset.y + 1) animated:NO];            _tempView.center = CGPointMake(_tempView.center.x, _tempView.center.y + 1);        }    }    //处理滚动    CGFloat maxMoveDistance = 20;    if (touchPoint.y < minOffsetY) {        //cell在往上移动        CGFloat moveDistance = (minOffsetY - touchPoint.y)/_edgeScrollRange*maxMoveDistance;        [self setContentOffset:CGPointMake(self.contentOffset.x, self.contentOffset.y - moveDistance) animated:NO];        _tempView.center = CGPointMake(_tempView.center.x, _tempView.center.y - moveDistance);    }else if (touchPoint.y > maxOffsetY) {        //cell在往下移动        CGFloat moveDistance = (touchPoint.y - maxOffsetY)/_edgeScrollRange*maxMoveDistance;        [self setContentOffset:CGPointMake(self.contentOffset.x, self.contentOffset.y + moveDistance) animated:NO];        _tempView.center = CGPointMake(_tempView.center.x, _tempView.center.y + moveDistance);    }}复制代码