[Solved] Why Selected value get deselect when I reload table view in objective c

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In ios table view reuse the cell for every row so it does happen.
You use model class for manage selection . I have add selectors on button on cell .And also example of reload table view. Please check below code.

//
//  ViewController.m

#import "ViewController.h"
#import "DataModel.h"
#import "MyTableViewCell.h"

@interface ViewController ()
{
    NSMutableArray *arrData;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    arrData = [[NSMutableArray alloc]init];

    // create 15 model and store in array
    for (int i =0; i<15; i++)
    {
        DataModel *model = [DataModel new];
        model.strSelected = @"";
        [arrData addObject:model];

    }

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return  arrData.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    MyTableViewCell *cell = [self.tblView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];

    // tag add on buttons
    cell.btnPPressed.tag = indexPath.row;
    cell.btnFPressed.tag = indexPath.row;
    cell.btnWPressed.tag = indexPath.row;
    cell.btnNAPressed.tag = indexPath.row;

    //method add on buttons
    [cell.btnPPressed addTarget:self action:@selector(btnP:) forControlEvents:UIControlEventTouchUpInside];
    [cell.btnFPressed addTarget:self action:@selector(btnF:) forControlEvents:UIControlEventTouchUpInside];
    [cell.btnWPressed addTarget:self action:@selector(btnW:) forControlEvents:UIControlEventTouchUpInside];
    [cell.btnNAPressed addTarget:self action:@selector(btnNA:) forControlEvents:UIControlEventTouchUpInside];


    //background color change on button
    DataModel *model = [arrData objectAtIndex:indexPath.row];
    if([model.strSelected isEqualToString:@"P"])
    {
        cell.btnPPressed.backgroundColor = [UIColor redColor];
    }
   else if([model.strSelected isEqualToString:@"F"])
    {
        cell.btnFPressed.backgroundColor = [UIColor redColor];
    }
   else if([model.strSelected isEqualToString:@"W"])
   {
       cell.btnWPressed.backgroundColor = [UIColor redColor];
   }
   else if([model.strSelected isEqualToString:@"NA"])
   {
       cell.btnNAPressed.backgroundColor = [UIColor redColor];
   }
   else
   {
       cell.btnPPressed.backgroundColor = [UIColor darkGrayColor];
       cell.btnFPressed.backgroundColor = [UIColor darkGrayColor];
       cell.btnWPressed.backgroundColor = [UIColor darkGrayColor];
       cell.btnNAPressed.backgroundColor = [UIColor darkGrayColor];

   }


    return cell;
}


//buttons methods

-(void)btnP:(UIButton *)sender
{
    sender.backgroundColor = [UIColor redColor];
    DataModel *model = [arrData objectAtIndex:sender.tag];
    model.strSelected = @"P";

    //example reload table
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tblView reloadData];
    });



}
-(void)btnF:(UIButton *)sender
{
    sender.backgroundColor = [UIColor redColor];
    DataModel *model = [arrData objectAtIndex:sender.tag];
    model.strSelected = @"F";

    //example reload table
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tblView reloadData];
    });


}
-(void)btnW:(UIButton *)sender
{
    sender.backgroundColor = [UIColor redColor];
    DataModel *model = [arrData objectAtIndex:sender.tag];
    model.strSelected = @"W";


    //example reload table
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tblView reloadData];
    });

}
-(void)btnNA:(UIButton *)sender
{
    sender.backgroundColor = [UIColor redColor];
    DataModel *model = [arrData objectAtIndex:sender.tag];
    model.strSelected = @"NA";


    //example reload table
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.tblView reloadData];
    });

}

@end


//  DataModel.h
#import <Foundation/Foundation.h>

@interface DataModel : NSObject
@property(nonatomic, strong)NSString *strSelected;

@end


//  MyTableViewCell.h
#import <UIKit/UIKit.h>

@interface MyTableViewCell : UITableViewCell
@property (strong, nonatomic) IBOutlet UIButton *btnPPressed;
@property (strong, nonatomic) IBOutlet UIButton *btnFPressed;
@property (strong, nonatomic) IBOutlet UIButton *btnWPressed;
@property (strong, nonatomic) IBOutlet UIButton *btnNAPressed;

@end

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solved Why Selected value get deselect when I reload table view in objective c