在 Swift 中，如何从 UITableView 中获取对象 id 并根据对象 id 删除对象？

Posted 2023-03-12

【中文标题】在 Swift 中，如何从 UITableView 中获取对象 id 并根据对象 id 删除对象？

【英文标题】：In Swift, how to grab object id from UITableView and delete object based on object id?

【发布时间】：2015-02-09 11:34:55

【问题描述】：

我不知道如何在用户从中选择 UITableView 后从 UITableView 中获取对象 id，在另一个视图控制器中，我想根据我已经从前一个获取的对象 id 删除该对象。

UITableView

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 

        /* grab object id here and pass to NSUserDefault*/

        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

        let deleteViewController = storyBoard.instantiateViewControllerWithIdentifier("accessView") as DeleteViewController
        self.presentViewController(deleteViewController, animated:true, completion:nil)

    

删除视图控制器

/* Delete object happen here*/

【参考方案1】：

您可以在DeleteViewController 中设置一个属性，并在初始化视图控制器时将值传递给它。

class DeleteViewController 
  var objectId: Int?


// Previous view controller
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 

  // Grab your object from the data source
  let object = dataSource[indexPath.row]

  let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

  let deleteViewController = storyBoard.instantiateViewControllerWithIdentifier("accessView") as DeleteViewController

  // Pass the Id
  deleteViewController.objectId = object.objectId
  self.presentViewController(deleteViewController, animated:true, completion:nil)

【参考方案2】：

我已经找到答案了。

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 

        let data: NSManagedObject = myList[indexPath.row] as NSManagedObject

        let objectId = data.valueForKeyPath("objectId") as? String
        NSUserDefaults.standardUserDefaults().setObject(objectId, forKey: "objectId")

        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
        let deleteViewController = storyBoard.instantiateViewControllerWithIdentifier("accessView") as DeleteViewController
        self.presentViewController(deleteViewController, animated:true, completion:nil)