我以编程方式创建了一个NSTableView，其中包含一组6列，其参数在Enum中定义：

public enum SearchResultFields: Int, Codable, CaseIterable {

case symbol = 0
case name = 1
case securityClass = 2
case countryCode = 3
case currencyCode = 4
case ISIN = 5

public var displayString: String {
    
    switch self {
    case .symbol: return "Symbol"
    case .name : return  "Name"
    case .securityClass : return  "Type"
    case .countryCode : return  "Country"
    case .currencyCode : return  "Currency"
    case .ISIN: return "ISIN"
    }
}

var macOSDefaultWidth: CGFloat {
    
    switch self {
        
    case .symbol: return  100
    case .name: return  200
    case .securityClass: return  80
    case .countryCode: return  100
    case .currencyCode: return  80
    case .ISIN: return  100
    }
    
}

当显示表格的窗口出现时，我调整窗口的大小，使其宽度与表格中所有列的宽度完全相同（在表格的每一侧加上16pt的间隔符）：

let defaultWidth = SearchResultFields.allCases.map({ $0.macOSDefaultWidth }).reduce(0, +) + 16 * 2
print("deafultWidth = \(defaultWidth)")
                
let oldFframe = self.searchWindowController?.window?.frame ?? CGRect(x: 200, y: 200, width: 600, height: 400)
let newFrame = self.userSettings.searchWindowFrame ??  CGRect(x: oldFframe.minX, y: oldFframe.minY, width: defaultWidth, height: 600)
self.searchWindowController?.window?.setFrame(newFrame, display: true)

表在NScrollView中创建为.documentView，它不允许自动调整大小，然后将每个列添加到表中，迭代Enum：

self.resultsView.columnAutoresizingStyle = .noColumnAutoresizing
    
for searchField in SearchResultFields.allCases {
                
   let column = NSTableColumn(identifier: NSUserInterfaceItemIdentifier(rawValue: searchField.displayString))
                
   let headerCell = CustomTableHeaderCell(parentTable: self.resultsView, standards: standards, textCell: searchField.displayString)
   column.headerCell = headerCell
   column.resizingMask = .userResizingMask
       
   column.width = searchField.macOSDefaultWidth
   column.minWidth = 30
   column.maxWidth = 1000
                
              
   let descriptor = NSSortDescriptor(key: searchField.displayString, ascending: true)
                column.sortDescriptorPrototype = descriptor
   print("Adding Column: \(searchField.displayString) - width: \(column.width)")
                self.resultsView.addTableColumn(column)
}

程序运行并显示窗口时，所有打印输出均符合预期：以Enum提供的大小添加列，并且窗口大小正好是所有列宽度加上表的每一侧上的16pts间隔符的总和。

Adding Column: Symbol - width: 100.0
Adding Column: Name - width: 200.0
Adding Column: Type - width: 80.0
Adding Column: Country - width: 100.0
Adding Column: Currency - width: 80.0
Adding Column: ISIN - width: 100.0

deafultWidth = 692.0
width: 692.0
SearchVC Bounds: Optional((0.0, 0.0, 692.0, 572.0))

但是窗口只显示前5列，而不是最后一列。它就在那里，但是您需要滚动视图才能看到它，这不是预期的结果。

有人知道我做错了什么吗？
谢谢