Print NSMutableArray into UITableView - ios

Question

In my application I have a tableview with a barbuttonitem. When I press the barbuttonitem, I see an alertcontroller that allows me to enter data. Then later, save these data within a NSMutableArray and my purpose is to print one of these data within the cells of a tableview. The problem is that the data acquisition is correct, but the tableview remains empty. I do not understand why, it seems all right!
Class: FeedInfo
#import <Foundation/Foundation.h>
#interface FeedInfo : NSObject
#property (nonatomic,strong) NSString *feedURL;
#property (nonatomic,strong) NSString *feedTitle;
#property (nonatomic,strong) NSString *feedCategory;
#end
And then I have a barbuttonitem inside a tableview. When I click on this button, I open a controller alert that allows me to enter 3 fields: url, feed, category.
I have declared #property(nonatomic,strong) NSMutableArray *feedArray;
I then insert these dates into the NSMutableArray.
- (IBAction)inserFeed:(UIBarButtonItem *)sender {
UIAlertController * alertController = [UIAlertController alertControllerWithTitle: #"Feed RSS: info?"
message: #""
preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = #"Feed URL";
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
textField.borderStyle = UITextBorderStyleRoundedRect;
}];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = #"Feed Title";
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
textField.borderStyle = UITextBorderStyleRoundedRect;
}];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = #"Feed category";
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
textField.borderStyle = UITextBorderStyleRoundedRect;
}];
[alertController addAction:[UIAlertAction actionWithTitle:#"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSArray * textfields = alertController.textFields;
UITextField * urlfield = textfields[0];
UITextField * titlefield = textfields[1];
UITextField * categoryfield = textfields[2];
FeedInfo *newFeed = [[FeedInfo alloc] init];
newFeed.feedURL = urlfield.text;
newFeed.feedTitle = titlefield.text;
newFeed.feedCategory = categoryfield.text;
[self.feedArray addObject:newFeed];
[self.tableView reloadData];
}]];
[self presentViewController:alertController animated:YES completion:nil];
}
Everything works here. The problem is printing one of these fields within a cell of my tableview.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:#"cell"];
FeedInfo *feedToShow = [self.feedArray objectAtIndex:indexPath.row];
cell.textLabel.text = feedToShow.feedTitle;
return cell;
}

Answer 1

Problem with your cell creation. Your cell object is nil
Use the following code to get the cell object.
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
dequeueReusableCellWithIdentifier: forIndexPath : newer dequeue method guarantees a cell is returned and resized properly, assuming identifier is registered
If you didn't set the cell identifier on the xib/storyboard then
You must call registerClass or registerNib in order to be able to use the dequeueReusableCellWithIdentifier:forIndexPath: method.
Update :
Datasource array is not allocated. Allocate feedArray inside the viewDidLoad()
- (void)viewDidLoad {
[super viewDidLoad];
self.feedArray = [[NSMutableArray alloc]init];
}