swift - 设置指向用 Swift 解析的指针

Question

我有一个用户搜索一所学校，然后点击他们想要的学校。在 cellForRowAtIndexPath 中，我查询所选学校并获取其 objectId。然后，我将 objectId 设置为 PFUser.currentUser 中的指针“school_name”。指针指向“Schools”类，其中列出了所有学校。我收到一条错误消息“key school_name 的类型无效，预期是 *Schools，但得到了字符串(代码:111，版本:1.12.0)”。我似乎无法绕过它，因为 objectId 是一个字符串。我什至可以打印得到正确的 objectId。

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

    let spinningActivity = MBProgressHUD.showHUDAddedTo(self.view, animated: true)
    spinningActivity.labelText = "Just a Moment"
    spinningActivity.detailsLabelText = "Adding Details"

    let schoolIndexPath = tableView.indexPathForSelectedRow!
    let selectedCell = tableView.cellForRowAtIndexPath(schoolIndexPath)! as UITableViewCell
    let school : String = String(selectedCell.textLabel!.text!)

    let schoolObjectIdQuery = PFQuery(className:"Schools")
    schoolObjectIdQuery.whereKey("school_name", matchesRegex: school)



    let query = PFQuery.orQueryWithSubqueries([schoolObjectIdQuery])

    if reachabilityStatus == kNOTREACHABLE {

        spinningActivity.hide(true)



        self.displayAlert("No Internet Connection", message: "Please connect to the internet before continuing.")


    } else {

        query.findObjectsInBackgroundWithBlock {
            (results: [PFObject]?, error: NSError?) -> Void in

            if error != nil {

                self.displayAlert("Error", message: error!.localizedDescription)

            }

            if let objects = results {

                self.searchResults.removeAll(keepCapacity: false)

                for object in objects {

                    let schoolObjectId = object.objectId!

                    let addDetails : PFUser = PFUser.currentUser()!

//                        let schoolObjectIdFormatted = PFObject(withoutDataWithClassName: "school_name", objectId: schoolObjectId)

                    addDetails.setObject(schoolObjectId, forKey: "school_name")

                    print(school)
                    print(schoolObjectId)

                    addDetails.saveInBackgroundWithBlock({ (success:Bool, error:NSError?) -> Void in



                        if error != nil {

                            spinningActivity.hide(true)

                            self.displayAlert("Error", message: error!.localizedDescription)

                        }

                        if success {

                            spinningActivity.hide(true)

                            self.dismissViewControllerAnimated(true, completion: nil)

                            print("Success")

                        }

                    })



                }



            }
        }
    }

}

Answer 1

因为您尝试使用指针...而不是字符串。您需要保存整个学校对象，而不是保存 objectId。