我正在尝试在源列表侧边栏中显示一个简单的字符串列表 - 类似于Finder或Github应用程序中的字符串。从阅读protocol reference我无法看到哪种方法设置了视图显示的内容。到目前为止,我有:
var items: [String] = ["Item 1", "Item 2", "Item is an item", "Thing"]
func outlineView(outlineView: NSOutlineView, child index: Int, ofItem item: AnyObject?) -> AnyObject {
return items[index]
}
func outlineView(outlineView: NSOutlineView, isItemExpandable item: AnyObject) -> Bool {
return false
}
func outlineView(outlineView: NSOutlineView, numberOfChildrenOfItem item: AnyObject?) -> Int {
if item == nil {
return items.count
}
return 0
}
func outlineView(outlineView: NSOutlineView, objectValueForTableColumn tableColumn: NSTableColumn?, byItem item: AnyObject?) -> AnyObject? {
return "ITEM"
}
func outlineView(outlineView: NSOutlineView, setObjectValue object: AnyObject?, forTableColumn tableColumn: NSTableColumn?, byItem item: AnyObject?) {
println(object, tableColumn, item)
}
// Delegate
func outlineView(outlineView: NSOutlineView, dataCellForTableColumn tableColumn: NSTableColumn?, tem item: AnyObject) -> NSCell? {
println("Called")
let view = NSCell()
view.stringValue = item as String
return view
}
我得到的是一个包含四个空白项目的源列表(无文本)。我是否需要覆盖NSOutlineViewDelegate中的另一个方法来显示信息?
答案 0 :(得分:3)
如果您乐意使用基于视图的大纲视图,而不是基于单元格的大纲视图,则可以替换委托方法{{1其视图等效outlineView:dataCellForTableColumn:item
outlineView:viewForTableColumn:item:
请注意,此方法中的重要调用是func outlineView(outlineView: NSOutlineView,
viewForTableColumn tableColumn: NSTableColumn?,
item: AnyObject) -> NSView? {
var v = outlineView.makeViewWithIdentifier("DataCell", owner: self) as NSTableCellView
if let tf = v.textField {
tf.stringValue = item as String
}
return v
}
方法NSTableView
。此方法的第一个参数 - 字符串 DataCell - 是makeViewWithIdentifier:owner:
Interface Builder 赋予identifier
对象的值,它自动插入将其拖动到画布上时,将NSTableViewCell
放入其中。该对象具有NSOutlineView
属性和textField
;您需要做的就是将imageView
的{{1}}属性设置为stringValue
的值。