objective-c : insert fake data in tableview (add a fake item to the list when you press the Add button)

snippet.m

//insert fake data in tableview (add a fake item to the list when you press the Add button)


//ChecklistItem.h

@interface ChecklistItem : NSObject

@property (nonatomic, copy) NSString *text;
@property (nonatomic, assign) BOOL checked;

- (void)toggleChecked;

@end

//ChecklistItem.m

@implementation ChecklistItem

@end


//ChecklistsViewController.h

@interface ChecklistsViewController : UITableViewController

- (IBAction)addItem;

@end


//ChecklistsViewController.m

@implementation ChecklistsViewController
{
  NSMutableArray *_items;
}

- (void)viewDidLoad
{
  [super viewDidLoad];

  _items = [[NSMutableArray alloc] initWithCapacity:20];

  ChecklistItem *item;

  item = [[ChecklistItem alloc] init];
  item.text = @"Walk the dog";
  item.checked = NO;
  [_items addObject:item];
}

- (IBAction)addItem {
    
    NSInteger newRowIndex = [_items count]; //현재 _items 배열의 수는 1이고 실제 배열이 있는곳은 index 0 이므로... 
    
    //뮤터블 배열에 추가
    ChecklistItem *item = [[ChecklistItem alloc] init];
    item.text = @"I am a new row";
    item.checked = NO;
    [_items addObject:item];
    
    
    //table views use index-paths to identify rows
    //so first make an NSIndexPath object that points to the new row, using newRowIndex variable
    //index-path object now points to row 1 (in section 0)    
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:newRowIndex inSection:0];
    NSArray *indexPaths = @[indexPath];
    [self.tableView insertRowsAtIndexPaths:indexPaths
                          withRowAnimation:UITableViewRowAnimationAutomatic];
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
  return [_items count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ChecklistItem"];

  ChecklistItem *item = _items[indexPath.row];

  //...
	
  return cell;
}


@end