TableView doesn´t reload after modal view - ios

Question

Im making a program where im practicing UIPopoverController's for iPad
in the first popover i have a tableView with some cells , what i want to do is to call a new view with a textfield so i can add new cells with the textfield text .
The problem i have is that when i dismiss the second view the tableView is not updated . I can't call reloadData because the first view don't call "viewWillAppear" ou any other .
In the iphone simulator it works well because iphone don't use uiPopoverController but in iPad i have to dismiss the first popover and the view only reloads when i enter the second time.
I know by reading some posts that its possible to use notification center to make it happen but i don't know how
My code is this
-first view , the tableView
BNRAssetTypeViewController.h
#import <Foundation/Foundation.h>
#class BNRItem;
#interface BNRAssetTypeViewController : UITableViewController
#property (nonatomic,strong) BNRItem *item;
#property (nonatomic, copy) void (^dismissBlock)(void);
#end
BNRAssetTypeViewController.m
#import "BNRAssetTypeViewController.h"
#import "BNRItem.h"
#import "BNRItemStore.h"
#import "BNRDetailViewController.h"
#import "AddNewAssetedTypeViewController.h"
#implementation BNRAssetTypeViewController
-(instancetype)init
{
//Chamar o designated initializer
self = [super initWithStyle:UITableViewStylePlain];
if (self) {
//Titulo
UINavigationItem *navItem = self.navigationItem;
navItem.title=#"New Asseted Type";
//Criar um novo bar button que faz novo item do lado direito
UIBarButtonItem *bbi =[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self action:#selector(addNewAssetedType)];
//meter do lado direito
navItem.rightBarButtonItem=bbi;
}
return self;
}
-(instancetype)initWithStyle:(UITableViewStyle)style
{
return [self init];
}
-(void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"ViewDidLoad");
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:#"UITableViewCell"];
}
-(void)viewWillAppear:(BOOL)animated
{
NSLog(#"ViewwillApear");
[self.tableView reloadData];
}
-(void)viewDidAppear:(BOOL)animated{
NSLog(#"ViewDidApear");
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[[BNRItemStore sharedStore]allAssetTypes]count];
}
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"UITableViewCell" forIndexPath:indexPath];
NSArray *allAssetTypes = [[BNRItemStore sharedStore]allAssetTypes];
NSManagedObject *assetType = allAssetTypes[indexPath.row];
// Use key-value coding to get the asset type's label
NSString *assetLabel = [assetType valueForKey:#"label"];
cell.textLabel.text = assetLabel;
// Checkmark the one that is currently selected
if (assetType == self.item.assetType) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
cell.accessoryType=UITableViewCellAccessoryCheckmark;
NSArray *allAssets = [[BNRItemStore sharedStore]allAssetTypes];
NSManagedObject *assetType = allAssets[indexPath.row];
self.item.assetType=assetType;
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
self.dismissBlock();
} else {
[self.navigationController popViewControllerAnimated:YES];
}
}
-(void)addNewAssetedType{
AddNewAssetedTypeViewController *anatvc = [[AddNewAssetedTypeViewController alloc]init];
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:anatvc];
navController.modalPresentationStyle=UIModalPresentationCurrentContext;
[self.navigationController presentViewController:navController animated:YES completion:nil];
}
-The second View
AddNewAssetedTypeViewController.h
#import <UIKit/UIKit.h>
#interface AddNewAssetedTypeViewController : UIViewController <UITextFieldDelegate>
#property (nonatomic,copy) void (^dismissBlock)(void);
#end
AddNewAssetedTypeViewController.m
#import "AddNewAssetedTypeViewController.h"
#import "BNRItemStore.h"
#import "BNRAssetTypeViewController.h"
#interface AddNewAssetedTypeViewController ()
#property (weak, nonatomic) IBOutlet UITextField *textField;
#end
#implementation AddNewAssetedTypeViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
UIBarButtonItem *doneItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:#selector(save:)];
self.navigationItem.rightBarButtonItem=doneItem;
UIBarButtonItem *cancelItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
target:self action:#selector(cancel:)];
self.navigationItem.leftBarButtonItem=cancelItem;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
-(void) viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self.view endEditing:YES];
[[BNRItemStore sharedStore] createAssetType:self.textField.text];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)cancel:(id)sender
{
[self.presentingViewController dismissViewControllerAnimated:YES
completion:nil];
}
-(void)save:(id)sender
{
[self.presentingViewController dismissViewControllerAnimated:YES
completion:nil];
}
#end

Answer 1

Olá!
You can fire a notification using NSNotificationCenter when something is added in the popover. First, register the first view controller to observe for that notification. In the first VC retain a reference to the observer you'll register later on:
#implementation BNRAssetTypeViewController {
id _observer;
}
In viewWillAppear:
_observer = [[NSNotificationCenter defaultCenter] addObserverForName:#"somethingAddedNotification"
object:nil
queue:nil
usingBlock:^(NSNotification *notification)
{
[self.tableView reloadData];
}];
In viewWillDisappear:
- (void)viewWillDisappear:(BOOL)animated {
[[NSNotificationCenter defaultCenter] removeObserver:_observer];
}
Then in the method save: in the second view controller:
[[NSNotificationCenter defaultCenter] postNotificationName:#"somethingAddedNotification" object:nil];
Disclaimer: untested code. Let me know how it goes.