iOS delete a tableview row

Question

I had my app working fine on iOS 6. With the upgrade I stopped being able to delete rows from my UITableView.

I've a button in my prototype cell.

Here is the button's function:

- (IBAction)deleteCell:(id)sender {
    UIButton *btn = (UIButton*) sender;
    UITableViewCell *cell = (UITableViewCell*) btn.superview.superview;
    NSIndexPath *indexPath = [_tableView indexPathForCell:cell];
    if([names count] > 9) {
        int index = indexPath.row;
        [names removeObjectAtIndex:index];
        [photos removeObjectAtIndex:index];
        [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
    } 
}

The problem is my index variable is always 0.

I tried another solution:

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

        if (editingStyle == UITableViewCellEditingStyleDelete) {
            int index = indexPath.row;
            [names removeObjectAtIndex:index];
            [photos removeObjectAtIndex:index];
            [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];

}
}

This solution doesn't work either. Nothing happens when I swipe right.

score 6 · Accepted Answer · answered Sep 23 '13 at 15:09

Try this sample tutorial,

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>
{
  NSMutableArray *arryData1;
  NSMutableArray *arryData2;
  IBOutlet UITableView *tableList;
}

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

 @end

@implementation ViewController

-(void)viewDidLoad
{
[super viewDidLoad];

arryData1 = [[NSMutableArray alloc] initWithObjects:@"MCA",@"MBA",@"BTech",@"MTech",nil];
arryData2 = [[NSMutableArray alloc] initWithObjects:@"Objective C",@"C++",@"C#",@".net",nil];
tableList.editing=YES;

}

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

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [arryData1 count];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier= @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] ;
}
cell.textLabel.text = [arryData1 objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [arryData2 objectAtIndex:indexPath.row];
return cell;
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {

if (editingStyle == UITableViewCellEditingStyleDelete) {
    int index = indexPath.row;
    [arryData1 removeObjectAtIndex:index];
    [arryData2 removeObjectAtIndex:index];

    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                     withRowAnimation:UITableViewRowAnimationFade];


}
}

- (UITableViewCellEditingStyle)tableView:(UITableView *)aTableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableList.editing)
{
    return UITableViewCellEditingStyleDelete;
}

return UITableViewCellEditingStyleNone;
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}

@ravindran.. if suppose you were to get confirmation from user after pressing the delete button and then deleting the rows is user presses Ok button. How would you do it? — TheGaME, Nov 04 '15 at 04:28

score 2 · Answer 2 · answered May 02 '14 at 07:52

I quess the problem is you're not reloading data again thus it's staying in cache memory

You can try to reload data with [tableView reloadData]; this method to the below of [_tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight]; this code line in your second solution.

score 1 · Answer 3 · answered Sep 23 '13 at 14:20

To show delete button on cell swipe you must implement this delegate method.

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return YES if you want the specified item to be editable.
    return YES;
}

Try this, i hope this will work for you.

score 1 · Answer 4 · edited May 06 '14 at 00:12

Use the tableview commiteditingstyle method to delete a cell/row of the tableviewcontroller.

Here is the workable code snip:

-(void) tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

{

    [ArrayHoldsCellObj removeObjectAtIndex:indexPath.row];

    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}

Note that the ArrayHoldsCellObj is the Array object you must declare and assign each cell to the area index.

score 0 · Answer 5 · edited Sep 23 '13 at 14:51

0

You can set the button tag = cell.index in cellForRowAtIndexPath.

And then

UITableViewCell *cell = (UITableViewCell *)
        [tableView cellForRowAtIndexPath:
        [NSIndexPath indexPathForRow:btn.tag inSection:0]];

so you can get the index

edited Sep 23 '13 at 14:51

ppaulojr

3,579
4
29
56

answered Sep 23 '13 at 14:28

Judy

1
3

score 0 · Answer 6 · answered Nov 07 '14 at 06:43

0

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
//add code here for when you hit delete
[dataSourceArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];

}    
}

answered Nov 07 '14 at 06:43

Rahul K Rajan

776
10
19

dataSourceArray is the array from which the cell contents comes – Rahul K Rajan Nov 07 '14 at 06:43

iOS delete a tableview row

6 Answers6

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