Data retrieved but Table Cell UILabel is empty? - ios

Question

I'm retrieving entity data from an endpoint with the following code (I've built my app on Drupal's iOS SDK), and I'm trying to display it in my TableView cell.
That said, when I use the following code to display it in my cell, it doesn't seem to want to work (the label just appears empty)? See console data below as well.
TableViewController.h
#property (strong, nonatomic) NSMutableArray *messages;
TableViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
NSDictionary *entityData = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:#"1"] forKey:#"uid"];
[DIOSEntity
entityGet:entityData
name:#"entity_message"
eid:#"uid"
success:^(AFHTTPRequestOperation *op, id response) {
self.messages = (NSMutableArray *)response;
NSLog(#"This is all of the data from response %#", response); }
failure:^(AFHTTPRequestOperation *op, NSError *err) { NSLog(#"failed to get data"); }
];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *PointsTableIdentifier = #"MyMessagesCell";
MyMessagesCell *cell = (MyMessagesCell *)[tableView dequeueReusableCellWithIdentifier:PointsTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"MyMessagesCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
NSDictionary *receivedMessages = [self.messages objectAtIndex:indexPath.row];
[[cell subjectLine] setText:[receivedMessages objectForKey:#"field_message_body"]];
NSLog(#"Received message subject are here %#", receivedMessages);
return cell;
}
CONSOLE DATA returns as:
2015-11-23 18:26:47.998 [624:153845] This is all of the data from response {
arguments = (
);
data = (
);
"field_message_body" = {
und = (
{
format = "<null>";
"safe_value" = "Testing message center";
value = "Testing message center";
}
);
};
"field_message_group_ref" = (
);
"field_message_subject" = {
und = (
{
format = "<null>";
"safe_value" = Testing;
value = Testing;
}
);
};

Answer 1

The tableView finished loading before you got the response. You can log something in
numberOfRowsInSection: and cellForRowAtIndexPath method see if it was before "This is all of the data from response ...".
You can call [self.tableview reloadData] on main thread to reload the tableview after you get the messages.

Answer 2

You need to make a better management of the response data. As #limfinity said, the responseData is a NSDictinary, not a NSMutableArray.
Also, you should reload the tableview after setting the messages in self.messages, so the table gets the new data from the 'new' self.messages:
[DIOSEntity
entityGet:entityData
name:#"entity_message"
eid:#"uid"
success:^(AFHTTPRequestOperation *op, id response) {
self.messages = (NSMutableArray *)response;
NSLog(#"This is all of the data from response %#", response); }
dispatch_async(dispatch_get_main_queue(), ^(void){
[self.tableView reloadData];
});
failure:^(AFHTTPRequestOperation *op, NSError *err) { NSLog(#"failed to get data"); }
];
EDIT
Just to make a simple (but not so correct) change to make this work and don't crash, you should say:
self.messages = [NSMutableArray arrayWithObject:(NSDictionary*)response];
instead of:
self.messages = (NSMutableArray *)response;
But I think you should go deeper and make the response be a NSArray, not just one NSDictionary (multiple NSDictionaries, instead of just one)

Answer 3

Based on your console logs:
2015-11-23 18:26:47.998 [624:153845] This is all of the data from response {
arguments = (
);
data = (
);
"field_message_body" = {//This is not a String!
und = (
{
format = "<null>";
"safe_value" = "Testing message center";
value = "Testing message center";
}
);
};
[receivedMessages objectForKey:#"field_message_body"] is not a string but a dictionary.
You need to parse that object a little more:
NSString *value = receivedMessages[#"field_message_body"][#"und"][#"value"];
[[cell subjectLine] setText:value];
And also don't forget to reload the tableview after you fetch the data.