Question

我有一个错误，idk如何解决它。错误是：“定义与先前值冲突。”我复制了下面的代码，并标记了标记的部分。提前谢谢。

import UIKit
import Parse
class ScienceTableViewController: UITableViewController, UITableViewDataSource {
    var dataRecords = [Data]()

    override func viewDidLoad() {
        super.viewDidLoad()

    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)

        dataRecords = [Data]()

        let query = PFQuery(className: "data")

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

            if error == nil {

                for object in objects! {

                    let data = Data(objectID: object.valueForKey("objectId")! as! String, title: object.valueForKey("title")! as! String, date: object.valueForKey("date")! as! String, information: object.valueForKey("information")! as! String)


                    self.dataRecords.append(data)
                    self.tableView.reloadData()

                }

            } else {             
                print(error)
            }   
        }
    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: - Table view data source

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return dataRecords.count > 0 ? 1 : 0

    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return dataRecords.count
    }


    **override func tableView(tableView: UITableView**, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)

            // Configure the cell...

        let title = dataRecords[indexPath.row].title
        let date = dataRecords[indexPath.row].date
        let information = dataRecords[indexPath.row].information

        cell.textLabel?.text = title
        cell.detailTextLabel?.text = date


        return cell
        }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        let controller: ViewController = segue.destinationViewController as! ViewController

        if segue.identifier == "newData"  {

            controller.objectID = ""

        } else if segue.identifier == "showData" {

            let indexPath: NSIndexPath = self.tableView.indexPathForSelectedRow!
            controller.objectID = dataRecords[indexPath.row].objectID


        }

    }


    }}

我也遇到了xCode的问题，它声称“Xcode遇到问题。源编辑器功能有限。尝试恢复”，编辑器无法识别代码的短暂时间。

Answer 1

我相信您的问题在于具有UITableViewDataSource作为协议的类声明行。 UiTableViewController已经是一个数据源，因此是多余的，应该删除。

与UITableViewDataSource协议混淆。与以前的冲突

1 个答案: