Question

我正在尝试将一些文本从UITextField保存到xcode 7中的CoreData，swift 2.0

  @IBOutlet weak var titleName: UITextField!
@IBOutlet weak var problemDescription: UITextField!
@IBOutlet weak var targetMarket: UITextField!

//Save information to core data
@IBAction func saveInformation(sender: AnyObject)  {
    print("Attempting to save!")
    let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
    let context: NSManagedObjectContext = appDel.managedObjectContext
    let newIdea = NSEntityDescription.insertNewObjectForEntityForName("SaveIdea", inManagedObjectContext: context)
    print("\(titleName) is cool")
    newIdea.setValue("\(titleName)", forKey: "title")
    newIdea.setValue("\(problemDescription)", forKey: "targetMarket")
    newIdea.setValue("\(targetMarket)", forKey: "problemSolved")
    do{
        try context.save()
        print("Save Success!")
    }catch {
        print("Error!")
    }

}

但是，它将信息存储为nil，当我尝试使用（titleName.text！，forKey：...）时（例如）它给我一个错误 - 尝试解包和可选的nil -

有谁知道修复？提前谢谢你:)

Answer 1

您可以使用nil合并运算符，例如：

let text = titleName.text ?? "n/a" 
newIdea.setValue(text, forKey: "title")

如何在swift 2中将UITextField保存到Core Data？

1 个答案: