#import "ViewController.h"@interface ViewController ()
     
      @end@implementation ViewController{        UITableView * _tableView;            NSMutableArray * _obj;    }- (void)viewDidLoad {    [super viewDidLoad];    _tableView = [[UITableView alloc]init];        _tableView.frame = self.view.bounds;        [self.view addSubview:_tableView];       _tableView.delegate = self;        _tableView.dataSource = self;//    [_tableView setEditing:YES animated:YES];    UILongPressGestureRecognizer * longpress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longpress:)];        [_tableView addGestureRecognizer:longpress];        _obj = [NSMutableArray arrayWithCapacity:10];        for (int i = 0; i<50 ; i++) {                                [_obj addObject:[NSNumber numberWithInt:i]];    }        _tableView.backgroundView =  [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"1"]];       //    [self tableView:nil moveRowAtIndexPath:nil toIndexPath:nil];}//-(BOOL)tableView:(UITableView *) tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath//{//    //打开编辑//    return YES;//}//- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath//{//    //允许移动//    return YES;//    //return NO;//}-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{        return _obj.count;}-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{        UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];            if (!cell) {                cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];            }    cell.textLabel.text = [NSString stringWithFormat:@"%ld" , indexPath.row];    cell.contentView.backgroundColor = [UIColor lightGrayColor];    return cell;}- (void)longpress:(id)sender {            UILongPressGestureRecognizer * longpress = (UILongPressGestureRecognizer *)sender;        UIGestureRecognizerState state = longpress.state;        CGPoint location = [longpress locationInView:_tableView];        NSIndexPath * indexPath = [_tableView indexPathForRowAtPoint:location];        static UIView * snapshot = nil;        static NSIndexPath * sourceIndexPath = nil;        switch (state) {        case UIGestureRecognizerStateBegan:                        if (indexPath) {                                sourceIndexPath = indexPath;                                UITableViewCell * cell = [_tableView cellForRowAtIndexPath:indexPath];                ／／截屏快照                snapshot = [self customSnapsFromView:cell];                                                __block CGPoint center = cell.center;                                snapshot.center = center;                                snapshot.alpha = 0.0;                                [_tableView addSubview:snapshot];                                [UIView animateWithDuration:0.25 animations:^{                                                           center.y = location.y;                                        snapshot.center = center;                                        snapshot.transform = CGAffineTransformMakeScale(1.05, 1.05);                                        snapshot.alpha = 0.98;                                        cell.alpha = 0.0f;                                    }completion:^(BOOL finished) {                                        cell.hidden = YES;                                    }];                            }                                    break;                    case UIGestureRecognizerStateChanged:{                        CGPoint center = snapshot.center;            center.y = location.y;                        snapshot.center = center;                        if (indexPath && ![indexPath isEqual:sourceIndexPath]) {                                ／／交换数组元素的位置                [_obj exchangeObjectAtIndex:indexPath.row withObjectAtIndex:sourceIndexPath.row];                  　　　　　　　　／／交换cell的位置                [_tableView moveRowAtIndexPath:sourceIndexPath toIndexPath:indexPath];                                                sourceIndexPath = indexPath;            }                                break;        }                                                                   default:                    {                        UITableViewCell * cell = [_tableView cellForRowAtIndexPath:indexPath];                        [UIView animateWithDuration:0.25 animations:^{                                snapshot.center = cell.center;                                snapshot.transform = CGAffineTransformIdentity;                                snapshot.alpha = 0.0;                                cell.alpha = 1.0f;            }completion:^(BOOL finished) {                                               cell.hidden = NO;                                [snapshot removeFromSuperview];                                snapshot = nil;                            }];                        sourceIndexPath = nil;              break;        }                          }        }-(UIView *)customSnapsFromView:(UIView *)inputView {        UIView * snapshot = nil;    ／／7.0一下的系统版本 截图快照    if ([[[UIDevice currentDevice]systemVersion]doubleValue]<7.0) {                snapshot = [self customSnapShortFromViewEx:inputView];            }else{                snapshot = [inputView snapshotViewAfterScreenUpdates:YES];    }        snapshot.layer.masksToBounds = NO;        snapshot.layer.cornerRadius = 0.0;        snapshot.layer.shadowOffset = CGSizeMake(-5.0, 0.0);        snapshot.layer.shadowRadius = 5.0;        snapshot.layer.shadowOpacity = 0.4;            return snapshot;    }-(UIView *)customSnapShortFromViewEx:(UIView *)inputView {            CGSize inSize = inputView.bounds.size;
     

// 下面方法，第一个参数表示区域大小。第二个参数表示是否是非透明的。如果需要显示半透明效果，需要传NO，否则传YES。第三个参数就是屏幕分辨率

UIGraphicsBeginImageContextWithOptions(inSize, NO, [UIScreen mainScreen].scale);        [inputView.layer renderInContext:UIGraphicsGetCurrentContext()];        UIImage * image = UIGraphicsGetImageFromCurrentImageContext();        UIGraphicsEndImageContext();        UIImageView * snapshot = [[UIImageView alloc]initWithImage:image];        return snapshot;        }-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{        [tableView deselectRowAtIndexPath:indexPath animated:NO];    }-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{        return 64.0f;}@end