How to pass data from 2nd viewcontroller to tableviewcontroller using delegates - ios

Question

I have 2 viewcontrollers - one is a tableview and the other is a normal viewcontroller. I want pass data from the second viewcontroller to a tableview controller by using delegates. I have created a delegate and delegatemethod in viewcontroller and implemented delegatemethod in the tableview controller. The problem is that I am getting data to the array but tableview is not reloading. Why?
Can anyone help with this problem? Thanks in advance.
#import "TableViewController.h"
#interface TableViewController ()<name>{
NSMutableArray *data;
}
#end
#implementation TableViewController
- (void)viewDidLoad {
[super viewDidLoad];
data = [NSMutableArray array];
[self.tableView reloadData];
}
- (IBAction)callingSecondView:(id)sender {
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:[NSBundle mainBundle]];
ViewController *var = [storyboard instantiateViewControllerWithIdentifier:#"vc"];
var.delegate = self;
[self.navigationController pushViewController:var animated:YES];
}
-(void)getdata:(NSString *)name{
[data addObject:name];
[self.tableView reloadData];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [data count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
if (cell != nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"cell"];
}
cell.textLabel.text = [data objectAtIndex:indexPath.row];
return cell;
}
And I am creating delegate a object and protocol in ViewController.h
#import <UIKit/UIKit.h>
#protocol name <NSObject>
-(void)getdata : (NSString *)name;
#end
#interface ViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITextField *txt;
- (IBAction)done:(id)sender;
#property(nonatomic,retain) id<name> delegate;
ViewController.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize delegate;
- (void)viewDidLoad {
[super viewDidLoad];
}
- (IBAction)done:(id)sender {
[delegate getdata:self.txt.text];
[self.navigationController popToRootViewControllerAnimated:YES];
}
#end

Answer 1

I think the first VC don't reloadData because it's not the visible VC. Try reloadData when the VC willAppear.
-(void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.tableView reloadData];
}