How to insert items to a UITableView when a UIButton is clicked in iOS

ios, objective-c, uitableview

Solution

You are doing it right,

- (IBAction)addItems:(id)sender {
    // I thought it was as simple as this, but it doesn't work
    [self.names addObject:@"Brad"];
    [self.tableView relaodData];
}

is the correct way.

Please double check the variable tableView, I can't see the declaration of it.

make sure you have,

@property(weak, nonatomic) IBOutlet UITableView *tableView;
[self.tableView setDelegate:self];
[self.tableView setDataSource:self];

and properly connected the tableView to .nib

Problem

I have been practicing with tableViews but I cannot figure out how to insert new items when a button is clicked. This is what I have: `BIDViewController.h`: ``` #import <UIKit/UIKit.h> @interface BIDViewController : UIViewController // add protocols <UITableViewDataSource, UITableViewDelegate> //this will hold the data @property (strong, nonatomic) NSMutableArray *names; - (IBAction)addItems:(id)sender; @end ``` `BIDViewController.m`: ``` #import "BIDViewController.h" @interface BIDViewController () @end @implementation BIDViewController //lazy instantiation -(NSMutableArray*)names { if (_names == nil) { _names = [[NSMutableArray alloc]init]; } return _names; } - (void)viewDidLoad { [super viewDidLoad]; // add data to be display [self.names addObject:@"Daniel"]; [self.names addObject:@"Alejandro"]; [self.names addObject:@"Nathan"]; } //table view -(NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section { return [self.names count]; } - (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"identifier"]; if (cell == nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"identifier"]; } cell.textLabel.text = self.names [indexPath.row]; return cell; } - (IBAction)addItems:(id)sender { // I thought it was as simple as this, but it doesn't work [self.names addObject:@"Brad"]; [tableView relaodData]; } @end ``` I thought it was a simple as inserting items to the array and than reloading the data but it doesn't work. Can someone show me how to add new items to a tableView when a button is clicked? Thanks a lot

Original source