【发布时间】:2016-08-09 02:04:19
【问题描述】:
我试图创建一个基于单元格表(索引从 1 到 17)的拖放系统,该表连接到 NSImage 数组,根据拖放结果进行修改。我的桌子似乎接受拖动(有点透明度的数字是可移动的),但是当我放下时没有任何反应。我怀疑我的类型注册有问题,但我在 osx 有点新。有人可以帮忙吗?
var images:[NSImage] = []
func getImages() {
images = []
for i in 50...66 {
images.append(NSImage(named: "IMG_67\(i)")!)
}
}
func tableViewSelectionDidChange(notification: NSNotification) {
let table = notification.object
let selection = table?.selectedRow
imgView.image = images[selection!]
}
func tableView(tableView: NSTableView, objectValueForTableColumn tableColumn: NSTableColumn?, row: Int) -> AnyObject? {
tableView.cell?.title = String(row)
return row + 1
}
func numberOfRowsInTableView(tableView: NSTableView) -> Int {
getImages()
return images.count
}
func tableView(tableView: NSTableView, writeRowsWithIndexes rowIndexes: NSIndexSet, toPasteboard pboard: NSPasteboard) -> Bool {
let data:NSData = NSKeyedArchiver.archivedDataWithRootObject(rowIndexes)
let registeredTypes:[String] = [NSGeneralPboard] //Problem might be here
pboard.declareTypes(registeredTypes, owner: self)
pboard.setData(data, forType: NSGeneralPboard)
return true
}
func tableView(tableView: NSTableView, validateDrop info: NSDraggingInfo, proposedRow row: Int, proposedDropOperation dropOperation: NSTableViewDropOperation) -> NSDragOperation {
if dropOperation == .Above {
return .Move
}
return .All
}
func tableView(tableView: NSTableView, acceptDrop info: NSDraggingInfo, row: Int, dropOperation: NSTableViewDropOperation) -> Bool {
let data: NSData = info.draggingPasteboard().dataForType(NSGeneralPboard)!
let rowIndexes: NSIndexSet = NSKeyedUnarchiver.unarchiveObjectWithData(data) as! NSIndexSet
let value: NSImage = images[rowIndexes.firstIndex]
images.removeAtIndex(rowIndexes.firstIndex)
if (row > images.count)
{
images.insert(value, atIndex: row - 1)
} else {
images.insert(value, atIndex: row)
}
tableView.reloadData()
print("returning true") //Not getting called at all
return true
}
【问题讨论】:
标签: swift macos drag-and-drop nstableview