CODEWITHSUNDEEP
iphoneiosuitableviewtags
ProtoSphere
ProtoSphere

Reputation: 309

Update UITableViewCell tag property after row is moved

In my application I need to be able to keep track identify which cell a UITextField comes from when I commit the editing changes in textFieldDidEndEditing:. To do this, I just set the tag property on the cell's text field in tableview:cellForRowAtIndexPath:.

When the cells are moved, this causes a bit of trouble. For example, if I move the bottom cell up to the top, delete the cell that is now at the bottom, and then try to edit the cell I just placed at the top, my app will crash because the tag property is still at 8 (or another number), but there aren't this many elements in my datasource.

I tried to fix this problem by updating the tag in tableView:moveRowAtIndexPath:toIndexPath:

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
    NSString *siteToMove = [[sites objectAtIndex:[fromIndexPath row]] retain];

    [sites removeObjectAtIndex:[fromIndexPath row]];
    [sites insertObject:siteToMove atIndex:[toIndexPath row]];

    if ([toIndexPath section] == 1) {
        [[(BookmarkTextEntryTableViewCell *)[[self tableView] cellForRowAtIndexPath:toIndexPath] textField] setTag:[toIndexPath row]];
    }
}

However, this doesn't work because (BookmarkTextEntryTableViewCell *)[[self tableView] cellForRowAtIndexPath:toIndexPath] returns the cell that was there before moving the row.

Upvotes: 1

Views: 1088

Answers (1)

tipycalFlow
tipycalFlow

Reputation: 7644

In your - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath method, you can iterate through all the UITextFields that you might've added as subViews to the table and then check and set the new tag as-

for (UIView* subview in [[self tableView] subviews]) {
 if ([subview isKindOfClass:[UITextField class]]) {  
  if(subview.tag==oldTag){
    subview.tag = newTag;
    break;
  }
 }
}

EDIT: On second thought, you can just reload the table data in case that resets all the remaining cell's tags too.

Upvotes: 1

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