didSelectRowAtIndexPath not working with NSNotificationCenter - ios

Question

I have a MasterDetail app that I am working on that will be used to show players (as in sports) and detail stats. The list of players is called from a Postgres Database and parsed from JSON using the JSONModel. So far, I am able to get all of the data that I need from the Postgres DB, and display it perfectly in the MasterView. I am using the NSNotificationCenter to pass the data from the Master to the Detail view (I fetch the data using a function in the MasterView). I am able to pass the data accurately to the Detail view, but for some reason, my didSelectRowAtIndexPath is not working right. I obviously did something wrong, but I have no idea what it is. Here are the important parts of the code:
In the MasterViewController.m viewDidAppear:
-(void)viewDidAppear:(BOOL)animated
{
//fetch the feed from the Postgres Database
[JSONHTTPClient getJSONFromURLWithString:#"http://myurl" completion:^(NSDictionary *json, JSONModelError *err) {
NSError* error = nil;
_feed = [[PostgresFeed alloc]initWithDictionary:json error:&error];
//Print the data fethced to NSLog in JSON format
NSLog(#"Players: %#", _feed.players);
[[NSNotificationCenter defaultCenter] postNotificationName:#"myNotification" object:nil userInfo:json];
//reload the table view after data collected
[self.tableView reloadData];
}];
}
and I collect that info in my DetailViewController.m like so:
- (void)handleNotification:(NSNotification *) notification
{
NSLog(#"%#", notification.userInfo);
NSArray *playerData = [notification.userInfo objectForKey:#"player"];
NSDictionary *firstElement = [playerData objectAtIndex:0];
nameLabel.text = [firstElement objectForKey:#"name"];
}
and then my didSelectRowAtIndexPath in my MasterViewController
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
Player *selectedPlayer = [_players objectAtIndex:indexPath.row];
if (_delegate) {
[_delegate selectedPlayer:slectedPlayer];
}
}
There you have it. If you want me to post more or if you want code from the DetailViewController.m, MasterViewController.h, or PlayerSelectionDelegate.h, just let me know.
As a note, I originally created this based off of the Ray Wenderlich iPad SplitView app tutorial a while back. And yes, I am new to this all.

Answer 1

You need to place the NSNotification in
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
//Here you have the NSDictionary from the json
[JSONHTTPClient getJSONFromURLWithString:#"http://myurl" completion:^(NSDictionary *json, JSONModelError *err) {
NSError* error = nil;
_feed = [[PostgresFeed alloc]initWithDictionary:json error:&error];
//Print the data fethced to NSLog in JSON format
NSLog(#"Players: %#", _feed.players);
[JSONHTTPClient getJSONFromURLWithString:#"http://myurl" completion:^(NSDictionary *json, JSONModelError *err) {
NSError* error = nil;
_feed = [[PostgresFeed alloc]initWithDictionary:json error:&error];
//Print the data fethced to NSLog in JSON format
NSLog(#"Players: %#", _feed.players);
//Assuming that you have the players in the same order as your list
[[NSNotificationCenter defaultCenter] postNotificationName:#"myNotification" object:nil userInfo:[[json objectForKey:#"players"]objectAtIndex:indexPath.row]];
}];
Player *selectedPlayer = [_players objectAtIndex:indexPath.row];
if (_delegate) {
[_delegate selectedPlayer:slectedPlayer];
}
}
And in your DetailViewController :
- (void)handleNotification:(NSNotification *) notification
{
NSLog(#"%#", notification.userInfo);
nameLabel.text = [notification.userInfo objectForKey:#"name"];
}