Tableview Rows delete ios - ios

Question

I used two(canEditRowAtIndexPath and commitEditingStyle ) methods for delete rows based on index, whenever I went to next view and coming back to the table view deleted rows are again appeared.
How can I delete the rows permanently in table view? it would be very helpful to me.

Answer 1

Seems like you just delete the data from UI, so you got the problem.
You must delete the data from your source and UI at the same time.
Just reference this code:
#interface ViewController ()
#property UITableView* tableView;
#property NSMutableArray* dataArray;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_dataArray = [[NSMutableArray alloc] init];
for (int i = 0; i<10; i++) {
[_dataArray addObject:[NSString stringWithFormat:#"Test%d",i]];
}
_tableView = [[UITableView alloc] initWithFrame:[UIScreen mainScreen].bounds];
_tableView.dataSource = self;
_tableView.delegate = self;
[self.view addSubview:_tableView];
_tableView.editing = true;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return _dataArray.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:#"MyTableCell"];
if (nil == cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"MyTableCell"];
}
cell.textLabel.text = [_dataArray objectAtIndex:indexPath.row];
return cell;
}
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath{
return true;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
if (editingStyle == UITableViewCellEditingStyleDelete) {
//Delete data from source
[_dataArray removeObjectAtIndex:indexPath.row];
//Delete row from UI
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];
}
}
#end
Hope it can help you.

Answer 2

Use NSMutableArray as your UITableView's datasource.
In commitEditingStyle Delegate....
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[datasourceArray removeObjectAtIndex:indexPath.row];
}
}