Question

我依次有2 UIAlertController。我想要的是，在显示1º之后，如果用户单击2个选项中的一个，它将仅显示第二个。现在显示1ºUIAlertControllers并且不显示第二个Block1。

代码很大，但我已对Block2名为func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { let pratos = queryArray[indexPath.row] as PFObject var confirmar = 0 //BLOCK1 //Pergunta o tipo de entrega let actionSheetController: UIAlertController = UIAlertController(title: "Selecione o método de entrega", message: "", preferredStyle: .ActionSheet) let cancelAction: UIAlertAction = UIAlertAction(title: "Cancelar", style: .Cancel) { action -> Void in } actionSheetController.addAction(cancelAction) let takePictureAction: UIAlertAction = UIAlertAction(title: "Take Away", style: .Default) { action -> Void in confirmar = 1 } actionSheetController.addAction(takePictureAction) let choosePictureAction: UIAlertAction = UIAlertAction(title: "Entrega ao domicílio", style: .Default) { action -> Void in confirmar = 2 } actionSheetController.addAction(choosePictureAction) self.presentViewController(actionSheetController, animated: true, completion: nil) println("Hello") //BLOCK2 if confirmar == 1 || confirmar == 2 { //Confirma se pretende comprar var loginTextField: UITextField? let alertController = UIAlertController(title: "Deseja continuar?", message: "A sua encomenda será processada.", preferredStyle: .Alert) var preco = pratos.objectForKey("Preco") as! String let ok = UIAlertAction(title: "Comprar \(preco)€" , style: .Default, handler: { (action) -> Void in var Transacao = PFObject(className:"Transacao") Transacao["pointerUser"] = PFUser.currentUser() Transacao["pointerRestaurante"] = self.restauranteRow Transacao["pointerProduto"] = pratos Transacao["entrega"] = confirmar Transacao.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in if (success) { self.performSegueWithIdentifier("compraEfectuada", sender: self) } else { // There was a problem, check error.description } } }) let cancel = UIAlertAction(title: "Cancelar", style: .Cancel) { (action) -> Void in println("Cancel Button Pressed") } alertController.addAction(ok) alertController.addAction(cancel) presentViewController(alertController, animated: true, completion: nil) } }和{{1}}

的{{1}}块进行了评论

我该怎么做？

{{1}}

Answer 1

目前，在tableview的函数中创建了UIAlertController两个if。当用户单击它时，tableview委托会触发此函数。由于整个功能在第一个警报控制器出现之前执行，因此无法创建第二个。所以你的UIAlertController陈述总是错误的。

将第二个confirmer放在一个单独的函数中。不是将func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { //BLOCK1 //Pergunta o tipo de entrega alertOne() } func alertOne() { //BLOCK1 let actionSheetController: UIAlertController = UIAlertController(title: "Selecione o método de entrega", message: "", preferredStyle: .ActionSheet) let cancelAction: UIAlertAction = UIAlertAction(title: "Cancelar", style: .Cancel) { action -> Void in } actionSheetController.addAction(cancelAction) let takePictureAction: UIAlertAction = UIAlertAction(title: "Take Away", style: .Default) { action -> Void in alertTwo(1) } actionSheetController.addAction(takePictureAction) let choosePictureAction: UIAlertAction = UIAlertAction(title: "Entrega ao domicílio", style: .Default) { action -> Void in alertTwo(2) } actionSheetController.addAction(choosePictureAction) self.presentViewController(actionSheetController, animated: true, completion: nil) } func alertTwo(confirmar:Int) { //BLOCK2 let pratos = queryArray[indexPath.row] as PFObject //Confirma se pretende comprar var loginTextField: UITextField? let alertController = UIAlertController(title: "Deseja continuar?", message: "A sua encomenda será processada.", preferredStyle: .Alert) var preco = pratos.objectForKey("Preco") as! String let ok = UIAlertAction(title: "Comprar \(preco)€" , style: .Default, handler: { (action) -> Void in var Transacao = PFObject(className:"Transacao") Transacao["pointerUser"] = PFUser.currentUser() Transacao["pointerRestaurante"] = self.restauranteRow Transacao["pointerProduto"] = pratos Transacao["entrega"] = confirmar Transacao.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in if (success) { self.performSegueWithIdentifier("compraEfectuada", sender: self) } else { // There was a problem, check error.description } } }) let cancel = UIAlertAction(title: "Cancelar", style: .Cancel) { (action) -> Void in println("Cancel Button Pressed") } alertController.addAction(ok) alertController.addAction(cancel) self.presentViewController(alertController, animated: true, completion: nil) }设置为1或2，而是触发相应的功能。然后它会工作。

Dim objWdDoc As Word.Document
Dim objWord As Word.Application
Dim sDesktop As String = Environment.GetEnvironmentVariable("userprofile") & "\Desktop\"

objWord = CreateObject("Word.Application")
objWdDoc = objWord.Documents.Open(sDesktop & "testdocument.doc")
objWord.Visible = True

'Select Printer
objWord.ActivePrinter = "Fax"
'Print to Tiff
objWdDoc.PrintOut(Range:=WdPrintOutRange.wdPrintAllDocument, _
                  OutputFileName:=sDesktop & "test.tiff", _
                  Item:=WdPrintOutItem.wdPrintDocumentContent, _
                  PrintToFile:=True)
'Close Document
objWdDoc.Close()
'Close Word
objWord.Quit()
'General Cleanup
objWdDoc = Nothing
objWord = Nothing

按顺序运行两个UIAlertController

1 个答案: