How to change font size of NSTableHeaderCell

Question

I am trying to change the font size of my NSTableView within my code to allow the user to change it to their liking. I was successful by changing the font size of each NSTableCellView but failed to do so by the header cells.

I was trying to do it like this

let headerCell = NSTableHeaderCell()
let font = NSFont(name: "Arial", size: 22.0)
headerCell.stringValue = "firstname"
headerCell.font = font
customerTable.tableColumns[0].headerCell = headerCell

The stringValue of the header cell will be set accordingly but the size does not change. How can I change the font size of my headers?

Thanks

Oliver

Answer 1

You can create a NSTableHeaderCell subclass and implement the property you want to change.

In Objective-C (I'm not good at Swift):

@implementation CustomTableHeaderCell

-(NSFont *)font {
    return [NSFont fontWithName:@"Arial" size:22];
}

// you can alse custom textColor
-(NSColor *)textColor {
    return [NSColor redColor];
}

@end

Assign CustomTableHeaderCell:

CustomTableHeaderCell *headerCell = [[CustomTableHeaderCell alloc] init];
headerCell.stringValue = @"Header title";
self.tableView.tableColumns[0].headerCell = headerCell;

In Cocoa, there are many things you can't change its style by cell.font = ..., you need to create a subcalss.