UITableView delegate and datasource in a separate class after parsing

Question

I need to set my UITableView delegate and datasource from a separate class (data ready after parsing called by a method), but every time my table is emtpy. I'm using ARC and this is simplified code:

//HomeViewController.h

#import <UIKit/UIKit.h>
#import "TableController.h"

@interface HomeViewController : UIViewController {

    IBOutlet UITableView *table;
    TableController *tableController;
}

@end

and

//HomeViewController.m

#import "HomeViewController.h"

@interface HomeViewController ()

@end

@implementation HomeViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    tableController = [[TableController alloc] init];
    table.dataSource = tableController.tableSource.dataSource;
    table.delegate = tableController.tableSource.delegate;
    [tableController loadTable]; // HERE I CALL LOADTABLE FROM TABLECONTROLLER CLASS TO PARSE DATA AND POPULATE UITABLEVIEW
    [table reloadData];

}

and

// TableController.h

#import <UIKit/UIKit.h>

@interface TableController : NSObject <UITableViewDelegate, UITableViewDataSource> {

   UITableView *tableSource;

   // a lot of NSMutableArray to parse my data

}

- (void)loadTable;

@property (nonatomic, strong) UITableView *tableSource;

@end

and

//TableController.m

#import "TableController.h"
#import "AFNetworking.h"

@interface TableController ()

@end

@implementation TableController

@synthesize tableSource;

- (void)loadTable {

    NSURL *parseURL = // remote URL to parse Data
    NSURLRequest *request = [NSURLRequest requestWithURL:parseURL];
    AFJSONRequestOperation *parseOperation = [AFJSONRequestOperation
                                               JSONRequestOperationWithRequest:request
                                               success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

                                                   // code to parse Data and NSLog to test operation

                                                   [tableSource reloadData];
                                                   [tableSource setUserInteractionEnabled:YES];
                                                   [tableSource scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:YES];

                                               }
                                               failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
                                                   NSLog(@"%@", [error userInfo]);
                                               }];
    [parseOperation start];
    [tableSource setUserInteractionEnabled:NO];
}

and, obviously, still in TableController.m, all the classic UITableView delegate methods:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// my code
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// my code
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
// my code
}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
// my code
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
// my code
}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
// my code
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// my code
}

Well, the parse is perfect (I can test it with a NSLog), but my table is empty. Can u help me?

EDIT: In my code loadTable parsing method is asynchronous, so table load with right datasource and delegate but BEFORE all data is parsed; in fact IF I SET a fixed numberOfRows and then SCROLL TABLE I can see all the rows populated. But, when I load HomeViewController, *table is still EMPTY.

Answer 1

From where/How you are setting UITableView *tableSource object in your TableController ?

Also try reloading tableview in main thread.

Edit

Change these in your HomeController viewDidLoad

   table.dataSource = tableController.tableSource.dataSource;
   table.delegate = tableController.tableSource.delegate;

to

   table.dataSource = tableController;
   table.delegate = tableController;

Also get set HomeController class as delegate of TableController & once you get the response . Call a method in HomeController to reload the tableview (in main thread)!!!

For that first create a property parent in your TableController .h file like this

@property(nonatomic,retain) id parent;

Then set the HomeController as the delegate from HomeController viewDiDLoad like

tableController.parent = self.

Once you get response in completion block call,

[self.parent reloadTableView]; // reloadTableView will be a function in the HomeController that is having [self.table reloadData].

Hope this will fix the issue.