NSOpenPanel as

Question

我环顾了其他答案，但似乎没有任何帮助我的情况。

我有一个viewController类，它包含一个按钮的IBAction。此按钮应该打开一个NSOpenPanel自该一个的viewController片：

class ViewController: NSViewController { 
@IBAction func folderSelection(sender: AnyObject) { 
    var myFiledialog: NSOpenPanel = NSOpenPanel() 
    myFiledialog.prompt = "Select path" 
    myFiledialog.worksWhenModal = true 
    myFiledialog.allowsMultipleSelection = false 
    myFiledialog.canChooseDirectories = true 
    myFiledialog.canChooseFiles = false 
    myFiledialog.resolvesAliases = true 

    //myFiledialog.runModal() 

    myFiledialog.beginSheetModalForWindow(self.view.window!, completionHandler: nil) 


    var chosenpath = myFiledialog.URL 
    if (chosenpath!= nil) 
    { 
     var TheFile = chosenpath!.absoluteString! 
     println(TheFile) 
     //do something with TheFile 
    } 
    else 
    { 
     println("nothing chosen") 
    } 
} 
} 

的问题来自myFileDialog.beginSheetModalForWindow（..），其工作原理与上面的行，但是这不是一个片效果

Answer 1

您需要从您的窗口的面板上拨打beginSheetModalForWindow，并使用完成块：

let myFiledialog = NSOpenPanel() 
myFiledialog.prompt = "Select path" 
myFiledialog.worksWhenModal = true 
myFiledialog.allowsMultipleSelection = false 
myFiledialog.canChooseDirectories = true 
myFiledialog.canChooseFiles = false 
myFiledialog.resolvesAliases = true 
myFiledialog.beginSheetModalForWindow(window, completionHandler: { num in 
    if num == NSModalResponseOK { 
     let path = myFiledialog.URL 
     print(path) 
    } else { 
     print("nothing chosen") 
    } 
})