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A complete example showing how to construct an NSTableView programmatically (no NIB!) and take care of the small issues like column spacing. Complete description of this example here: https://kitcross.net/nstableview-in-playgrounds/
import AppKit
import PlaygroundSupport
let tableViewFrame = NSRect(x: 0, y: 0, width: 250, height: 500)
class TableViewController: NSViewController {
let tableView: NSTableView = {
let tableView = NSTableView()
// By default a tableview has column spacing. We only have
// one column so this will the table from side scrolling
tableView.intercellSpacing = NSSize(width: 0, height: 2)
tableView.headerView = nil
return tableView
}()
let scrollView = NSScrollView()
let column = NSTableColumn()
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
tableView.delegate = self
tableView.addTableColumn(column)
column.width = tableViewFrame.size.width
scrollView.documentView = tableView
}
// Loading a view controller without a NIB requires that we
// override loadView and provide our own view instead
override func loadView() {
view = scrollView
}
}
extension TableViewController: NSTableViewDataSource {
func numberOfRows(in tableView: NSTableView) -> Int {
return 30
}
}
extension TableViewController: NSTableViewDelegate {
func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat {
return 20
}
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
return NSTextField(labelWithString: "Cell \(row + 1)")
}
}
let vc = TableViewController(nibName: nil, bundle: nil)
vc.view.frame = tableViewFrame
PlaygroundPage.current.liveView = vc
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