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我正在使用NSView子類在大綱中生成自定義單元格的NSOutlineView。我已經開始工作了，但是在Outline從模型類吸取數據並正確顯示之後，Outline從內存中釋放（？）/變爲零，並且我還沒有想出一種方法來獲取它背部。重新加載NSWindow Xcode Swift2
這裏是MainViewController類
class MainWindowController: NSWindowController, ShareInfoDelegate, NSOutlineViewDelegate, NSOutlineViewDataSource {
override var windowNibName: String {
return "MainWindowController"
}
@IBOutlet var daOutline: NSOutlineView!
// The NSoutline I'm trying to get back to
一些東西相關的測試數據（略） 帶領我們到NSOutlineViewDataSource東西
//MARK: - NSOutlineViewDataSource
func outlineView(outlineView: NSOutlineView, child index: Int, ofItem item: AnyObject?) -> AnyObject {
if let item: AnyObject = item {
switch item {
case let work as Work:
return work.movements[index]
case let movement as Movement:
return movement.tracks[index]
default:
let track = item as! Track
return track.credits[index]
}
} else {
if allWorks.count > 0 {
return allWorks[index]
}
}
let q = "patience"
return q
}
func outlineView(outlineView: NSOutlineView, isItemExpandable item: AnyObject) -> Bool {
switch item {
case let work as Work:
return (work.movements.count > 0) ? true : false
case let movement as Movement:
return (movement.tracks.count > 0) ? true : false
case let track as Track:
return (track.credits.count > 0) ? true: false
default:
return false
}
}
func outlineView(outlineView: NSOutlineView, numberOfChildrenOfItem item: AnyObject?) -> Int {
if let item: AnyObject = item {
switch item {
case let work as Work:
return work.movements.count
case let movement as Movement:
return movement.tracks.count
case let track as Track:
return track.credits.count
default:
return 0
}
} else {
return allWorks.count
}
}
func outlineView(daOutline: NSOutlineView, viewForTableColumn theColumn: NSTableColumn?, item: AnyObject) -> NSView? {
switch item {
case let worked as Work:
let cell = daOutline.makeViewWithIdentifier("newTry", owner:self) as! newTry
cell.fourthLabel.stringValue = worked.composer
cell.fourthCell.stringValue = worked.title
return cell
case let moved as Movement:
let cell2 = daOutline.makeViewWithIdentifier("SecondTry", owner:self) as! SecondTry
cell2.roman.stringValue = moved.name!
cell2.details.stringValue = moved.sections!
cell2.track.stringValue = "0"
return cell2
default:
print("probably not")
}
print("not again")
return nil
}
func outlineView(daOutline: NSOutlineView, heightOfRowByItem item: AnyObject) -> CGFloat {
switch item {
case let worked as Work:
return 40
default:
return 24
}
}
而且在WindowDidLoad
override func windowDidLoad() {
super.windowDidLoad()
let nib = NSNib(nibNamed: "newTry", bundle: NSBundle.mainBundle())
daOutline.registerNib(nib!, forIdentifier: "newTry")
let nib2 = NSNib(nibNamed: "SecondTry", bundle: NSBundle.mainBundle())
daOutline.registerNib(nib2!, forIdentifier: "SecondTry")
//give Sender it's Receiver
mailItOut.delegate = receiver
allWorks.append(work1)
allWorks.append(work2)
work1.movements.append(move1)
work1.movements.append(move2)
work1.movements.append(move3)
work1.movements.append(move4)
work2.movements.append(move5)
work2.movements.append(move6)
work2.movements.append(move7)
daOutline.reloadData()
daOutline?.expandItem(work1, expandChildren: false)
daOutline?.expandItem(work2, expandChildren: false)
}
}
終於newTry的NSView類是什麼樣
class newTry: NSView {
var delegate: ShareInfoDelegate?
@IBOutlet weak var fourthCell: NSTextField!
@IBOutlet weak var fourthLabel: NSTextField!
@IBAction func cellAdd(sender: NSTextField) {
var catchIt: String = String()
catchIt = sender.stringValue
if catchIt != "" {
tryAgain = catchIt
whichField = "title"
//Trigger the sender to send message to it's Receiver
mailItOut.sendMessage()
}
}
的cellAdd行動來嘗試從文本細胞回覆到模型中獲取用戶輸入。爲此，我（AFAIK）需要訪問NSOutline（daOutline）並獲取我所在的行，並將發件人的數據放入Model類的相應部分。這是我設法在標準（1單元/ 1數據值）大綱中工作的。但在這個原型中，據我所知，MainWindowController已經發布了它的所有內容，而daOutline是零（壞）。
如何讓XCode帶入/重新載入已完成的輪廓（或從不釋放它）並將daOutline轉換爲非零狀態？