TableView中的Move操作

需要实现UITableViewDelegate接口中的tableView:editingStyleForRowAtIndexPath:方法以及UITableViewDataSource接口中的tableView:canMoveRowAtIndexPath:方法和
tableView:moveRowAtIndexPath:toIndexPath:方法。

 

#pragma mark -
#pragma mark Table view delegate Methods
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView 
           editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {
    return UITableViewCellEditingStyleNone;
}

#pragma mark -
#pragma mark Table view data source Methods
- (BOOL)tableView:(UITableView *)tableView 
canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}

- (void)tableView:(UITableView *)tableView 
moveRowAtIndexPath:(NSIndexPath *)fromIndexPath 
      toIndexPath:(NSIndexPath *)toIndexPath {
    NSUInteger fromRow = [fromIndexPath row];
    NSUInteger toRow = [toIndexPath row];
    
    id object = [[list objectAtIndex:fromRow] retain];
    [list removeObjectAtIndex:fromRow];
    [list insertObject:object atIndex:toRow];
    [object release];
}

 

然后在导航上加上操作按钮：

 

UIBarButtonItem *editButton = [[UIBarButtonItem alloc]
                                   initWithTitle:@"Move"
                                   style:UIBarButtonItemStyleBordered
                                   target:self
                                   action:@selector(toggleEdit:)];
    self.navigationItem.rightBarButtonItem = editButton;
    [editButton release];

 

最后，实现toggleEdit:方法即可：

 

- (IBAction)toggleEdit:(id)sender {
    [self.tableView setEditing:!self.tableView.editing animated:YES];
    
    if (self.tableView.editing)
        [self.navigationItem.rightBarButtonItem setTitle:@"Done"];
    else
        [self.navigationItem.rightBarButtonItem setTitle:@"Move"];
}