swift – 无法调用非函数类型UIAlertAction的值

如果删除照片的功能返回错误,我想向用户显示该错误.

Xcode在errorController.addAction行上失败,消息“无法调用非函数类型UIAlertAction的值”

我正在使用Swift 2

@IBAction func deletePhoto(sender: AnyObject) {
    let alertController = UIAlertController(title: "Delete Photo",message: "Are you sure you want to delete this photo?",preferredStyle: .Alert)
    let okAction = UIAlertAction(title: "OK",style: .Default) { UIAlertAction in

        self.photoGateway!.delete(self.photo!.id!,completion: { (withError: Bool) -> Void in

            if (withError == true) {
                let errorController = UIAlertController(title: "Delete Failed",message: "blah",preferredStyle: UIAlertControllerStyle.Alert)
                //  The next line is causing the error
                errorController.addAction(UIAlertAction(title: "Ok",style: UIAlertActionStyle.Default,handler: nil))
                self.presentViewController(errorController,animated: true,completion: nil)
            } else {
                self.dismissViewControllerAnimated(true,completion: nil)
            }

        })

    }

    let cancelAction = UIAlertAction(title: "Cancel",style: .Cancel) { UIAlertAction in
        print("Cancelled")
    }

    alertController.addAction(okAction)
    alertController.addAction(cancelAction)
    self.presentViewController(alertController,completion: nil)
}

如果我拿出违规行,那么一切正常,只是用户无法解除警报