无法保存到核心数据

Question

我有一个运行时我在我的应用程序点击保存按钮

let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate 
    let context: NSManagedObjectContext = appDel.managedObjectContext! 
    print("checkpoint 1") 
    let newJob = NSEntityDescription.insertNewObjectForEntityForName("Job", inManagedObjectContext: context) 
    print("checkpoint 2") 
    newJob.setValue(jobTitleField.text, forKey: "title") 
    newJob.setValue(phoneNumberField.text, forKey: "phoneNumber") 
    print("checkpoint 3") 
    newJob.setValue(Double(hourlyRateField.text!), forKey: "hourlyRate") 
    newJob.setValue(Double(doublePayField.text!), forKey: "doublePayRate") 

    print("checkpoint 4") 
    do { 
     try context.save() 
    } catch { 
     print("There was error saving data.") 
    } 
    print("checkpoint 5") 

    self.dismissViewControllerAnimated(true, completion: {}) 

然而，当我运行应用程序，并通过访问MySQL数据库的SQLiteManager下面的代码中，数据不会出现在数据库中。

任何人都可以看到我做错了什么或我错过了什么？

Answer 1

你的代码看起来很好，除了对最新的Swift进行一些语法修改。下面的保存方法适用于Swift 2.1，如果你想尝试它

PS，用presentsViewController.dismiss替换self.dismiss，或者关闭self.dismiss将尝试删除当前vc的子vc，但我可以看到你正试图消除自我。

private func save(text:String, entityName:String, key:String) { 
    if let appDelegate = UIApplication.sharedApplication().delegate as? AppDelegate { 
     let managedContext = appDelegate.managedObjectContext 
     if let newjob = NSEntityDescription.entityForName(entityName, inManagedObjectContext: managedContext) { 
      let job = NSManagedObject(entity: newjob, insertIntoManagedObjectContext: managedContext) 
      job.setValue(text, forKey: key) 

      //save 
      do { 
       try managedContext.save() 
       //append it to your model in the project (most common to do) 
      } catch (let error) { 
       print("Not saved. \(error)") 
      } 
     } 
    } 
}