Access to attributes of user cells outside cellForRowAtIndexPath

Question

Access to attributes of user cells outside cellForRowAtIndexPath

I need something like the image below. The user can press the + or - button and the increased or decreased number is displayed in UILabel ie 1 in the image below.
I know how to implement a custom table view cell. I know how to implement a selector too. but I need to set the text of the label in accordance with the pressed button, that's just the problem. How can I click the refresh button and set the UILabel text of a custom cell outside from cellForRowAtIndexPathwith add subtraction function.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    //self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

     static NSString *simpleTableIdentifier = @"ProductListVIICell";

     ProductListVIICell *cell = (ProductListVIICell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil)
    {
         NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"ProductListVIICell" owner:self options:nil];
         cell = [nib objectAtIndex:0];
     } ....................................
        cell.btnMinus.tag = indexPath.row;
        cell.btnPlus.tag = indexPath.row;

        [cell.btnPlus addTarget:self action:@selector(addItem:) forControlEvents:UIControlEventTouchUpInside];
        [cell.btnMinus addTarget:self action:@selector(deleteItem:) forControlEvents:UIControlEventTouchUpInside];

        cell.lblCount.tag = [[NSString stringWithFormat:@"%d%d",addBtnClickCount,addBtnClickCount] integerValue];


        return cell;
    }

I need to do something here, but did not get what I want. cell.lblTitle.textdoes not work

  #pragma mark - UIButton selector

-(void)addItem:(UIButton*)button {
    itemCount++;
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:button.tag inSection:1];
    ProductListVIICell *cell = (ProductListVIICell *)[self.tableView cellForRowAtIndexPath:indexPath];
      cell.lblCount.textColor = [UIColor redColor];
     cell.lblTitle.text = [NSString stringWithFormat:@"%d",itemCount];

    NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
    NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
    [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];
     NSLog(@"%d",itemCount);
    [self.tableView reloadData];


}

-(void)deleteItem:(UIButton*)button {
    itemCount--;
     NSIndexPath *indexPath = [NSIndexPath indexPathForRow:button.tag inSection:1];
    ProductListVIICell *cell = (ProductListVIICell *)[self.tableView cellForRowAtIndexPath:indexPath];

    cell.lblCount.textColor = [UIColor redColor];
    cell.lblTitle.text = [NSString stringWithFormat:@"%d",itemCount];

    NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
    NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
    [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];
     NSLog(@"%d",itemCount);
    [self.tableView reloadData];

}

These links are also useful.

cellForRowAtIndexPath

http://code.tutsplus.com/tutorials/blocks-and-table-view-cells-on-ios--mobile-22982 UITableViewCell

,

@interface ProductListVC ()
{
    int count;
    bool addBtnClicked;
    bool minusBtnClicked;


}

@property (strong,nonatomic) NSMutableArray* quantityArray; //stores label
@property (strong,nonatomic) NSMutableArray* quantityLabelArray; //stores label

- (void)viewDidLoad {

    [super viewDidLoad];

    _quantityLabelArray = [[NSMutableArray alloc] init];
     _quantityArray = [[NSMutableArray alloc] init];

//determine num of row prevent index 2 beyond bounds for empty array error i.e insert straight to let say index 3
    for (int i=0; i <=[_productArray count]; i++) {
            [_quantityArray addObject:@"0"];

        }
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
................

if (!_quantityArray || !_quantityArray.count){
        cell.lblCount.text = [NSString stringWithFormat:@"%d", 0];

    }else{
        cell.lblCount.text = [_quantityArray objectAtIndex:indexPath.row];
     }
     [_quantityLabelArray addObject:cell.lblCount];


    if (addBtnClicked || minusBtnClicked) {
        //If add or minu button is reloading the cell

        cell.lblCount.text = [_quantityArray objectAtIndex:indexPath.row];
        //NSLog(@"%@",cell.lblCount.text);
        [_quantityLabelArray replaceObjectAtIndex:indexPath.row withObject:cell.lblCount];
        addBtnClicked = NO;
        minusBtnClicked = NO;

    }
    else
    {

    }

    cell.btnMinus.tag = indexPath.row;
    cell.btnPlus.tag = indexPath.row;
    cell.lblCount.tag = indexPath.row;

    [cell.btnPlus addTarget:self action:@selector(addItem:) forControlEvents:UIControlEventTouchUpInside];
    [cell.btnMinus addTarget:self action:@selector(deleteItem:) forControlEvents:UIControlEventTouchUpInside];

    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    return cell;
}



#pragma mark - UIButton selector

-(void)addItem:(UIButton*)button

{

     NSLog(@"btn tag %ld",(long)[button tag]);
     NSLog(@"quantitylblarry %@",_quantityLabelArray);

        UILabel* lblShowCount = [_quantityLabelArray objectAtIndex:[button tag]];
        if ([lblShowCount.text integerValue]< 10) {
            count = count+1;
            lblShowCount.text = [NSString stringWithFormat:@"%ld", [lblShowCount.text integerValue]+1];
        }

     NSLog(@"quantity array count %lu",(unsigned long)_quantityArray.count);

        if (_quantityArray.count > [button tag] ) {

            [_quantityArray removeObjectAtIndex:[button tag]];
            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];
        }

        else{

            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];
        }
        addBtnClicked = YES;

        NSLog(@"quantity array %@",_quantityArray);
        NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
        NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
        [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];

    }





-(void)deleteItem:(UIButton*)button{

     NSLog(@"%ld",(long)[button tag]);
    UILabel* lblShowCount = [_quantityLabelArray objectAtIndex:[button tag]];


        if ([lblShowCount.text integerValue]>=1) {
            count = count-1;
            lblShowCount.text = [NSString stringWithFormat:@"%ld", [lblShowCount.text integerValue]-1];

        }

        NSLog(@"%lu",(unsigned long)_quantityArray.count);

        if (_quantityArray.count > [button tag] ) {
            [_quantityArray removeObjectAtIndex:[button tag]];
            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];
        }
        else{
            [_quantityArray insertObject:lblShowCount.text atIndex:[button tag]];

        }
        NSLog(@"%@",_quantityArray);
        minusBtnClicked =YES;

        NSLog(@"quantity array %@",_quantityArray);
        NSIndexPath* rowToReload = [NSIndexPath indexPathForRow:[button tag] inSection:0];
        NSArray* rowsToReload = [NSArray arrayWithObjects:rowToReload, nil];
        [self.tableView reloadRowsAtIndexPaths:rowsToReload withRowAnimation:UITableViewRowAnimationNone];

 }

+3

ios objective-c uibutton

Nischal Hada 25 . '15 11:50

3

Mahmoud Adam · Answer 1 · 2015-06-25T12:32:09+0000

. , , . ViewController

.

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    CustomTableViewCell *cell = (CustomTableViewCell *)[tableView dequeueReusableCellWithIdentifier:@"CustomTableViewCell" forIndexPath:indexPath];
    cell.delegate = self;
    cell.itemIndex = indexPath.row;
    ....
    return cell
}

UPDATE

, UILabel +/-, CustomTableViewCell.m

-(void)addItem:(UIButton*)button {    
    self.itemQuantity++; 
    [self updateQuantity];
}

-(void)deleteItem:(UIButton*)button {
    self.itemQuantity--;
    [self updateQuantity];
}
- (void)updateQuantity{
    self.lblCount.text = [NSStirng stringWithFormat:@"%d", self.itemQuantity];
    [self.delegate updateItemAtIndex:self.itemIndex withQuantity:self.itemQuantity];
}

:

1.

@interface Item : NSObject
@property (nonatomic, strong) NSString *title;
@property (nonatomic) NSInteger quantity;
@end

@implementation Item

@end

2.

@interface CustomItemTableViewCell : UITableViewCell

@property (nonatomic, weak) IBOutlet UILabel *lblTitle;
@property (nonatomic, weak) IBOutlet UILabel *lblCount;
@property (nonatomic, assign) Item *item;
@end

@implementation CustomItemTableViewCell

- (void)updateCellWithItem:(Item *)item {
    self.item = item;
    [self updateCellView];
}
- (void)updateCellView {
    self.lblTitle.text = self.item.title;
    self.lblTitle.text = [NSString stringWithFormat:@"%ld", self.item.quantity];
}
- (IBAction)addItem:(UIButton*)button {
    self.item.quantity++;
    [self updateCellView];
}

- (IBAction)deleteItem:(UIButton*)button {
    self.item.quantity--;
    [self updateCellView];
}

@end

3. TableViewController

@interface ItemsTableViewController : UITableViewController
@property (nonatomic, strong) NSArray *items;
@end

@implementation ItemsTableViewController

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    CustomItemTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CustomItemCell" forIndexPath:indexPath];

    [cell updateCellWithItem:self.items[indexPath.row]];

    return cell;
}

Gandalf · Answer 2 · 2015-06-25T13:00:05+0000

, , , . . .

-(void)addItem:(UIButton*) button
{    
  NSLog(@"UIButton%ld",(long)button.tag);
  addBtnClickCount++;  //Increase the count by 1
  MyCustomCell *cell = button.superview.superview;
  //Now change the label text for cell
  cell.lblCount.text = [NSString stringWithFormat:@"%d",addBtnClickCount];
}

.

iOS · Answer 3 · 2016-01-21T11:10:53+0000

use steeper controls in the user table cell.

this is my screen. I used step control and label.

class customcell.h

@property (weak, nonatomic) IBOutlet UIStepper *stepper;
@property (weak, nonatomic) IBOutlet UILabel *lbl_value;

**** **** customcell.m

- (IBAction)stepper:(UIStepper *)sender {
    NSUInteger value = sender.value;
    lbl_value.text = [NSString stringWithFormat:@"%03d",value];
    self.txt1.text= [NSString stringWithFormat:@"%03d",value];

}

Access to attributes of user cells outside cellForRowAtIndexPath

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