Retrieve content from PubNub messages - ios

Question

I can successfully send and receive messages with PubNub, the problem comes when i try to display content from a message and load it a UITableViewCell's UITextView.
The Second TEST LOG writes out the whole message, that i send from my iPhone (i've already tried it with the Dev Console), but after this the app crashes.
[__NSCFDictionary length]: unrecognized selector sent to instance
I know there is something wrong with a dictionary, but i can't figure it out. I'm using only one NSDictionary for the message i send via PubNub and it "arrives" to the console, therefore I think it works properly. As you can see in the code i've tried some variations, but without any success.
UPDATE
It's working if i send NSString instead of NSDictionary.
#interface ViewController ()
#property (nonatomic, strong) NSString *myIncomeMessage;
#property (nonatomic, strong) NSString *messageFromDict;
#property (nonatomic, strong) NSArray *twoChannels;
#property (nonatomic, strong) NSDictionary *messagePbnb;
//#property (nonatomic, strong) PNMessage *messageNew;
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
PNChannel *channel_2 = [PNChannel channelWithName:current.username shouldObservePresence:NO];
PNChannel *channel_1 = [PNChannel channelWithName:self.messageRecipient shouldObservePresence:NO];
[PubNub subscribeOnChannels:self.twoChannels];
[PubNub requestHistoryForChannel:channel_1 from:nil to:nil limit:100 reverseHistory:YES];
[PubNub requestHistoryForChannel:channel_2 from:nil to:nil limit:100 reverseHistory:YES];
[[PNObservationCenter defaultCenter] addMessageReceiveObserver:self withBlock:^(PNMessage *message) {
NSLog(#"OBSERVER: Channel: %#, Message: %#", message.channel.name, message.message);
NSLog(#"Sample TEST LOG %#", message.message);
self.myIncomeMessage = message.message;
NSLog(#"Second TEST LOG %#", self.myIncomeMessage);
// self.messageFromDict = [NSString stringWithFormat:keyMessage, self.messagePbnb];
// self.messageFromDict = [NSString stringWithFormat:keyMessage, message];
}];
[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:#selector(reloadTable) userInfo:nil repeats:YES];
[self setupUIForInput];
}
- (IBAction) inputContent {
NSString *messageContent = self.textView.text;
PNChannel *channel_1 = [PNChannel channelWithName:self.messageRecipient shouldObservePresence:NO];
PNChannel *channel_2 = [PNChannel channelWithName:senderUser.username shouldObservePresence:NO];
self.twoChannels = #[channel_1,channel_2];
[PubNub subscribeOnChannels: self.twoChannels];
self.messagePbnb = #{ #"keyMessage": messageContent, #"keySenderUser": self.senderUser.username, #"keyRecieverChannel": self.messageRecipient} ;
[PubNub sendMessage: self.messagePbnb toChannel:channel_1];
[PubNub sendMessage: self.messagePbnb toChannel:channel_2];
[self.textView resignFirstResponder];
[self reloadInputViews];
}
-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 10;
}
-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
OutputTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cellThree"];
cell.textOutput.text = self.myIncomeMessage;
-(void)reloadTable{
[tableViewThree reloadData];
}

Answer 1

#sabin, here is an example, using an observer -- you could do a similar thing via a delegate:
[[PNObservationCenter defaultCenter] addMessageReceiveObserver:self
withBlock:^(PNMessage *message) {
id messageData = message.message;
if ([messageData isKindOfClass:[NSDictionary class]]) {
NSString *messageString = [NSString stringWithFormat:#"foo: %#, and bar: <%#>",
[(NSDictionary *)messageData valueForKey:#"foo"],
[(NSDictionary *)messageData valueForKey:#"bar"]];
}
}];
If you then published this from the Web Console (pubnub.com/console):
{"foo":"hey", "bar":"you!"}
You would be able to render a string from the above code (via messageString) that looked like this:
foo: hey, and bar: you!
Let me know if that helped!