Creating a view controller - ios

Question

I'm creating an iphone app using storyboard. I'm basically new on objective c and Xcode.
I have a list of categories, every time I click on a category it should open a tableView, so I can add an item in that category. But instead of getting a different tableView for each category, its the same table for all the categories and the added items are copied.
How can I create a new table for each label?
Thanks in advance!
Here's what I have for adding a category
#interface ListViewController ()
#end
#implementation ListViewController{
NSMutableArray *items;
}
#synthesize lists;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
items = [NSMutableArray arrayWithCapacity:20];
List *item = [[List alloc] init];
item.title = #"Grocery List";
[items addObject:item];
item = [[List alloc]init];
item.title = #"Project List";
[items addObject:item];
item = [[List alloc] init];
item.title = #"Events List";
[items addObject:item];
self.lists = items;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return [self.lists count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Configure the cell...
/*UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"ListsCell"];
List *list = [self.lists objectAtIndex:indexPath.row];
cell.textLabel.text = list.title;*/
ListCell *cell = (ListCell *)[tableView dequeueReusableCellWithIdentifier:#"ListsCell"];
List *list = [self.lists objectAtIndex:indexPath.row];
cell.titleLabel.text = list.title;
return cell;
}
//Add new list, new row will be added on the bottom and its data source must always be sync
-(void)addViewControllerSave:(AddViewController *)controller addList:(List *)list{
[self.lists addObject:list];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[self.lists count] - 1 inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
[self dismissViewControllerAnimated:YES completion:nil];
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
if(editingStyle == UITableViewCellEditingStyleDelete){
[self.lists removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
/* else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}*/
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
/*
#pragma mark - Navigation
*/
// In a story board-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
if([segue.identifier isEqualToString:#"AddList"]){
UINavigationController *navigationController = segue.destinationViewController;
AddViewController *addViewController = [[navigationController viewControllers] objectAtIndex:0];
addViewController.delegate = self;
}
else if([segue.identifier isEqualToString:#"ViewItem"]){
UINavigationController *nav = segue.destinationViewController;
ItemViewController *itemViewController = [[nav viewControllers] objectAtIndex:0];
itemViewController.delegate = self;
}
}
#pragma mark - AddViewControllerDelegate
-(void)addViewControllerCancel:(AddViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)addViewControllerSave:(AddViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)itemViewControllerBack:(ItemViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];
}
#end
Here's what I have for adding an item:
#interface ItemViewController ()
#end
#implementation ItemViewController{
NSMutableArray *newItems;
}
#synthesize items;
#synthesize delegate;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
newItems = [NSMutableArray arrayWithCapacity:20];
Item *i = [[Item alloc]init];
i.listItem = #"a";
[newItems addObject:i];
self.items = newItems;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return [self.items count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Configure the cell...
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"ItemsCell"];
Item *item = [self.items objectAtIndex:indexPath.row];
cell.textLabel.text = item.listItem;
return cell;
}
-(void)addIteViewControllerSave:(AddItemViewController *)controller addItem:(Item *)item{
[self.items addObject:item];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[self.items count] -1 inSection:0];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
[self dismissViewControllerAnimated:YES completion:nil];
}
#pragma mark - Navigation
// In a story board-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
if([segue.identifier isEqualToString:#"AddItem"]){
UINavigationController *navigationController = segue.destinationViewController;
AddItemViewController *addItemViewController = [[navigationController viewControllers]objectAtIndex:0];
addItemViewController.itemDelegate = self;
}
}
#pragma mark - AddItemViewControllerDelegate
-(void)addItemviewControllerCancel:(AddItemViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];
}
-(void)addIteViewControllerSave:(AddItemViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];
}
#pragma mark - ItemViewControllerDelegate
-(IBAction)back:(id)sender{
[self.delegate itemViewControllerBack:self];
}
#end
AddItemViewController
#import "AddItemViewController.h"
#import "Item.h"
#interface AddItemViewController ()
#end
#implementation AddItemViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(IBAction)cancel:(id)sender{
[self.itemDelegate addItemviewControllerCancel:self];
}
-(IBAction)save:(id)sender{
Item *item = [[Item alloc] init];
item.listItem = self.listItemTextField.text;
[self.itemDelegate addIteViewControllerSave:self addItem:item];
}
#end

Answer 1

Don't create a new table view for each label, instead populate it with different data for each label, you will need to change the object you are storing your data in and call
[tableView reloadData];
If all the added items you may need to clear out your array you are using to store the objects before adding the additional content.
[self.items removeAllObjects];