Repopulate TableView with new data - ios

Question

I have new data that I wish to put in my tableView, can you please help me with this. Currently mt table is populated with greekLetters and imageNames. On button click I wish to put new data in the table: greekLetters2
#interface ViewController2 ()
#end
#implementation ViewController2
- (void)viewDidLoad {
[super viewDidLoad];
self.greekLetters = #[#"BigBen",#"Colosseum",#"EiffelTower",#"GreatWallOfChina",#"StatueofLiberty",#"StBasils",#"Stonehenge",#"TajMahal",#"TowerOfPisa"];
self.imageNames = #[#"BigBen.jpg",#"Colosseum.jpg",#"EiffelTower.jpg",#"GreatWallOfChina.jpeg",#"StatueofLiberty.jpg",#"StBasils.jpg",#"Stonehenge.jpg",#"TajMahal.jpg",#"TowerOfPisa.jpg"];
self.greekLetters2 = #[#"BigBen2",#"Colosseum2",#"EiffelTower2",#"GreatWallOfChina2",#"StatueofLiberty2",#"StBasils2",#"Stonehenge2",#"TajMahal2",#"TowerOfPisa2"];
self.imageNames2 = #[#"BigBen2.jpg",#"Colosseum2.jpg",#"EiffelTower2.jpg",#"GreatWallOfChina2.jpeg",#"StatueofLiberty.jpg",#"StBasils2.jpg",#"Stonehenge2.jpg",#"TajMahal2.jpg",#"TowerOfPisa2.jpg"];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [self.greekLetters count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *SimpleIdentifier = #"SimpleIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SimpleIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:SimpleIdentifier];
}
UIImage *image = [UIImage imageNamed:self.imageNames[indexPath.row]];
cell.imageView.image = image;
cell.textLabel.text = self.greekLetters[indexPath.row];
cell.textLabel.font = [UIFont boldSystemFontOfSize:30];
if (indexPath.row < 3)
{
cell.detailTextLabel.text = #"A";
}
else
{
cell.detailTextLabel.text = #"B";
}
return cell;
}
-(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0)
{
return nil;
}
else
{
return indexPath;
}
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *rowValue = self.greekLetters[indexPath.row];
NSString *message = [[NSString alloc] initWithFormat:#"You selsected %#!",rowValue];
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Row Selected" message:message delegate:nil cancelButtonTitle:#"Yes" otherButtonTitles:nil, nil];
[alert show];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 70;
}
- (IBAction)SwitchTable:(id)sender
{
//repapulate
}
#end

Answer 1

The easiest way is to switch the two array when the button is pressed. greekLetters has to became greekLetters2 and viceversa. Then, simply reload the tableview data.
-(IBAction)SwitchTable:(id)sender {
NSArray *temp = [NSArray arrayFromArray:greekLetters];
greekLetters = [NSArray arrayFromArray:greekLetters2];
greekLetters2 = [NSArray arrayFromArray:temp];
[tableview reloadData];
}

Answer 2

Just have one nsmutablearray which will drive your tableview. If your greekLetters array would be nsmutablearray you would update it and then reload your tableview:
[self.greekLetters addObjectsFromArray:self.greekLetters2];
[self.tableView reloadData];

Answer 3

Fallow these two tutorials and they will guide you in achieving what you are looking for:
- https://www.youtube.com/watch?v=gT8ncroYdDw
- https://www.youtube.com/watch?v=NHzm-D9VsQA