NSTableViewCell selectedRow number for IBAction click - objective-c

Question

I'm running into a simple problem but have yet to find an optimal solution. I have a view based NSTableView that is loading it's cell views from different xibs. My table view is dynamic and based on user input I will dynamically add and remove rows ultimately adjusting the table data source. Each one of my NSTableCellViews have a button in it and I link the IBAction click handler to the NSView that holds the table view. What I need to do is get the row number for the button that was clicked in the table view so I can process the logic. I am able to do this successfully in : tableViewSelectionDidChange:(NSNotification *)notification
Here is how I do it:
- (void)tableViewSelectionDidChange:(NSNotification *)notification {
NSTableView *tableView = [notification object];
NSInteger selectedRow = [tableView selectedRow];
}
This works perfectly for a user actually clicking the row. Now when I move the NSButton IBAction and link it in the NSView as follows:
- (IBAction)buttonClickHandler:(NSButton *)sender {
NSInteger selectedRow = [self.tblView rowForView:sender];
NSLog(#"%ld", (long)selectedRow);
}
I based this approach from this selected answer.
I also tried this:
- (IBAction)buttonClickHandler:(NSButton *)sender {
id representedObject = [(NSTableCellView *)[sender superview] objectValue];
NSLog(#"%#", representedObject);
}
//My configuration
- (void)configureView {
[self.view setFrame:[self bounds]];
[self addSubview:self.view];
[self.view setWantsLayer:YES];
[self.view setTranslatesAutoresizingMaskIntoConstraints:NO];
self.tblView.delegate = self;
self.tblView.dataSource = self;
[self.tblView setIntercellSpacing:NSMakeSize(0, 0)];
[self.tblView registerNib: [[NSNib alloc] initWithNibNamed:#"ParentCellXib" bundle:nil] forIdentifier:#"ParentCell"];
[self.tblView registerNib: [[NSNib alloc] initWithNibNamed:#"ChildCellXib" bundle:nil] forIdentifier:#"ChildCell"];
[self.tblView registerNib: [[NSNib alloc] initWithNibNamed:#"HeaderCellXib" bundle:nil] forIdentifier:#"HeaderCell"];
}
But the represented object returns null. If it's worth mentioning, I've set my File's Owner as the View that holds the tableView so I can link the IBAction and I've subclassed the TableCellView to a different class. However, I don't think this is part of the problem as far as I can see. Is there a simple solution to reliably give me the selectedRow number based on a button click in that cell? Both approaches I tried above return -1 and null respectively.

Answer 1

I would set the row in NSButton's tag property:
- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
SomeTableCellView *cell = [tableView makeViewWithIdentifier:#"cell" owner:self];
if (cell == nil) {
cell = // init some table cell view
cell.identifier = #"cell";
}
cell.button.tag = row;
[cell.button setTarget:self];
[cell.button setAction:#selector(buttonAction:)];
}
- (IBAction)buttonAction:(id)sender {
NSLog(#"row: %d", sender.tag);
}

Answer 2

Try This
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
yourCustomeCell *aCell;
NSString *aStrIdentifier = #"yourIdentiFier";
aCell = (yourCustomeCell *)[tableView dequeueReusableCellWithIdentifier:aStrIdentifier];
//you have to set your indexpath
objc_setAssociatedObject(aCell.btnUpload_or_Add, #"objBtn", indexPath, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
[aCell.YourButton addTarget:self action:#selector(yourButtonActiontapped:) forControlEvents:UIControlEventTouchUpInside];
return aCell;
}
-(IBAction)yourButtonActiontapped:(UIButton *)sender{
NSIndexPath *aIndPath = objc_getAssociatedObject(sender, #"objBtn");
NSLog(#"row:%#",aIndPath.row);
}
also you have to import #import <objc/runtime.h>
another way to get row in IBAction is TAG but objc is better option insted of TAG.

Answer 3

Create a subclass of UIButton and add a property for NSIndexPath for the button. Use this button in cellForRowAtIndexPath method. assign the index path of the cell to that of index path of the button.
On Tap, get the index path from its sender. In your case index path of that button.