How to create UITableView programmatically - ios

Question

I have the following code to create a view with a table programmatically
- (void) createView:(UIViewController*)viewController{
_thisViewController = viewController;
CGFloat screenWidth = [UIScreen mainScreen].bounds.size.width;
CGFloat screenHeight = [UIScreen mainScreen].bounds.size.height;
UILabel *titleLabel = [[UILabel alloc] init];
titleLabel.text = #"Title";
titleLabel.frame = CGRectMake(75, 20, 200, 50);
titleLabel.textColor = [UIColor blackColor];
titleLabel.font = [titleLabel.font fontWithSize: 24];
UILabel *subtitleLabel = [[UILabel alloc] init];
subtitleLabel.text = #"Subtitle";
subtitleLabel.frame = CGRectMake(75, 50, 400, 50);
subtitleLabel.textColor = [UIColor blackColor];
subtitleLabel.font = [subtitleLabel.font fontWithSize: 20];
UILabel *labelStatus = [[UILabel alloc] init];
labelStatus.text = #"";
labelStatus.frame = CGRectMake(75, screenHeight - 290, 500, 50);
labelStatus.textColor = [UIColor blueColor];
labelStatus.font = [labelStatus.font fontWithSize: 20];
UITableView *tableDeviceList = [[UITableView alloc] init];
tableDeviceList.frame = CGRectMake(75, 100, screenWidth -250, screenHeight - 400);
tableDeviceList.dataSource = self;
tableDeviceList.delegate = self;
UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeSystem];
[cancelButton setTitle:#"Cancelar" forState:UIControlStateNormal];
[cancelButton sizeToFit];
cancelButton.frame = CGRectMake((screenWidth/2)-100, screenHeight - 250, 100, 50);
cancelButton.backgroundColor = UIColorFromRGB(0x066D8B);
cancelButton.layer.cornerRadius = 20;
[cancelButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[cancelButton addTarget:self action:#selector(cancelButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
UIViewController *viewControllerModal = [[UIViewController alloc] init];
UIView *nooView = [[UIView alloc] initWithFrame:CGRectMake(50, 80, screenWidth - 100, screenHeight - 160)];
nooView.backgroundColor = UIColorFromRGB(0xE8E8E8);
nooView.layer.cornerRadius = 20;
[nooView addSubview:titleLabel];
[nooView addSubview:subtitleLabel];
[nooView addSubview:tableDeviceList];
[nooView addSubview:labelStatus];
[nooView addSubview:cancelButton];
[viewControllerModal.view addSubview:nooView];
[viewController presentViewController: viewControllerModal animated:YES completion:nil];
}
Which is throwing me an error of tableView:numberOfRowsInSection:, so I wonder if is there a way to add a function to a UITableView created this way (I'm creating my UITableView programmatically).
Also, my class is of type NSObject, so I wonder if there will be a problem with the assignment of the dataSource and delegate properties of the tableDeviceList.

Answer 1

You need to implement the dataSource and delegate methods of UITableView in your class,
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1; // number of sections
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 10; // should be your array count
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellId = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellId];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellId];
}
cell.textlabel.text = #"test";
return cell;
}

Answer 2

Firstly, you should set the following:
UITableView(your tableview name).delegate = self;
UITableView(your tableview name).dataSource = self;
Secondly, you need to implement the delegate methods and datasource methods
such as: