UItableView 如何实现Cell之间交换位置

首先
[self.tableView
setEditing:YES
animated: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];
}