TableView does not display data from parse.com - ios

Question

Hi everyone beginner here.
I have a table view inside the ViewController. Content of the cell will be taken from parse.com. (A String) I already put necessary frameworks and set up a class in parse with a column and some rows.
I can tap the cells in simulator and when i add or delete new rows in parse the cells i can tap also changes.
But somehow the table turns empty, no label is displayed. I have no errors or issues.
Here is the code:
ViewController.h
#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#import "TableCell.h"
#interface ViewController : UIViewController <UITableViewDelegate> {
NSArray *Event;
}
#property (weak, nonatomic) IBOutlet UITableView *newsTable;
#end
ViewController.m
#import "ViewController.h"
#import "TableCell.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize newsTable;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self performSelector: #selector(retreiveFromParse)];
}
- (void) retreiveFromParse {
PFQuery *retrieveEvents = [PFQuery queryWithClassName:#"News"];
[retrieveEvents findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
Event = [[NSArray alloc] initWithArray:objects];
}
[newsTable reloadData];
}];
}
//*********************Setup table of folder names ************************
//get number of sections in tableview
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
//get number of rows by counting number of folders
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return Event.count;
}
//setup cells in tableView
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//setup cell
static NSString *CellIdentifier = #"EventCell";
TableCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
PFObject *tempObject = [Event objectAtIndex:indexPath.row];
cell.TitleLabel.text = [tempObject objectForKey:#"TitleLabel"];
return cell;
}
//user selects folder to add tag to
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(#"cell tapped");
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end

Answer 1

Few corrections -
First - it will be more appropriate to use a #property for the event array.
Second - it will be more appropriate to use Lowercased property name.
Your Array is not retained (it is nil), this is why you see nothing.
So, you should :
Add this to your interface -
#property (strong, nonatomic) NSArray *events;
Add this to your viewDidLoad, before you call retreiveFromParse
- (void)viewDidLoad
{
[super viewDidLoad];
self.events = [NSArray array];
// Do any additional setup after loading the view, typically from a nib.
[self performSelector: #selector(retreiveFromParse)];
}
That should work.
BTW
Parse has a TableViewController class that can simplify your work, look here -
Parse PFQueryTableViewController