UItableView 如何实现Cell之间交换位置

首先

[self.tableViewsetEditing:YESanimated:YES]; 打开UItableView 的编辑模式

然后 实现两个代理方法：

-(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;

}

最后实现代理方法

-(void) tableView: (UITableView *) tableView moveRowAtIndexPath: (NSIndexPath *) oldPath toIndexPath:(NSIndexPath *) newPath
{
   // NSString *title = [[self.categoryList objectAtIndex:oldPath.row] retain];
    BookCategory * caterory = [[self.categoryList objectAtIndex:oldPath.row] retain];
    NSLog(@"title is %@",caterory);
    [self.categoryList removeObjectAtIndex:oldPath.row];
    [self.categoryList insertObject:caterory atIndex:newPath.row];
    NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
    for(int i=0;i<[self.categoryList count];i++){
        BookCategory *bc = [self.categoryList objectAtIndex:i];
        NSString *key = bc.categoryId;
        NSInteger index = [self.categoryList indexOfObject:bc];
        NSNumber *value = [NSNumber numberWithInt:index];
        [ud setObject:value forKey:key];
    }
[caterory release];
    [self.tableView reloadData];
}