NStableView does not show my data - swift

Question

I have a tableView with an image and a textField but they are not showing the data. What could be missing?
I have tableColumn identifier set as MainCell...
I converted obj-c from here to swift.
Any suggestions?
import Cocoa
class viewTime: NSViewController, NSTableViewDataSource, NSTableViewDelegate {
var tableContents:NSMutableArray = []
#IBOutlet var tableView: NSTableView!
override func viewDidLoad() {
super.viewDidLoad()
let path: NSString = "/Library/Application Support/Apple/iChat Icons/Flags"
let fileManager:FileManager = FileManager.default
let directoryEnum:FileManager.DirectoryEnumerator = fileManager.enumerator(atPath: path as String)!
while let file = directoryEnum.nextObject() as? NSString{
let filePath:NSString = path.appendingFormat("/%#", file)
let obj:NSDictionary = ["image": NSImage(byReferencingFile:filePath as String), "name": file.deletingPathExtension]
print("obj:\(obj)")
tableContents.add(obj)
}
self.tableView.reloadData()
}
func numberOfRows(in tableView: NSTableView) -> Int {
return tableContents.count
}
private func tableView(tableView: NSTableView, viewForTableColumn tableColumn: NSTableColumn?, row: Int) -> NSView! {
let cellView = tableView.make(withIdentifier: "MainCell", owner: self) as! NSTableCellView
let flag:NSDictionary = tableContents[row] as! NSDictionary
let identifier:NSString = tableColumn!.identifier as NSString
if (identifier == "MainCell") {
cellView.textField?.stringValue = flag["name"] as! String
cellView.imageView!.image = flag["image"] as? NSImage
return cellView
}
return nil
}
}

Answer 1

Translating Objective-C to Swift literally is always a bad idea.
First of all make sure that both datasource and delegate of the table view are connected to the view controller in Interface Builder.
Make sure also that the Identifier of the NSTableCellView is MainCell
Most important change: Create a custom struct, it makes things so much easier.
struct Asset {
var name : String
var image : NSImage
}
Declare the data source array as Swift Array of the struct type.
var tableContents = [Asset]()
This is viewDidLoad in real Swift code. Don't annotate types unless the compiler tells you to do.
override func viewDidLoad() {
super.viewDidLoad()
let url = URL(fileURLWithPath:"/Library/Application Support/Apple/iChat Icons/Flags")
let enumerator = FileManager.default.enumerator(at: url, includingPropertiesForKeys: [], options: .skipsHiddenFiles, errorHandler: nil)!
for case let fileURL as URL in enumerator {
let asset = Asset(name: fileURL.deletingPathExtension().lastPathComponent, image: NSImage(contentsOf:fileURL)!)
tableContents.append(asset)
}
self.tableView.reloadData()
}
numberOfRows is OK.
tableView:viewForColumn:Row can be simplified as there is only one identifier and one column.
func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
let cellView = tableView.make(withIdentifier: "MainCell", owner: self) as! NSTableCellView
let asset = tableContents[row]
cellView.textField!.stringValue = asset.name
cellView.imageView!.image = asset.image
return cellView
}