ios - cellForRowAtIndexPath 在源获取数据之前执行

Question

override func viewDidLoad() {
    super.viewDidLoad()
    print("loaded hie \(accountId)")
    let request = SFRestAPI.sharedInstance().requestForQuery("SELECT Name,Id FROM Account where parentid='\(self.accountId)'");
    //SFRestAPI.sharedInstance().send(request, delegate: self);
    SFRestAPI.sharedInstance().sendRESTRequest(request, failBlock: {error in print(error)}, completeBlock: { responce in print(responce)
        self.dataRows = responce["records"] as! [NSDictionary]
        var counter = 0;
        for i in self.dataRows
        {
            let requestForGrandChilds = SFRestAPI.sharedInstance().requestForQuery("select Name,Id from Account where parentid='\(i["Id"]!)'")
            SFRestAPI.sharedInstance().sendRESTRequest(requestForGrandChilds,
            failBlock:
            {
                error in print(error)
                print("error block")
            },
            completeBlock:
            {
                responceChild in
                self.grandChilds = responceChild["records"] as! [NSDictionary]
                print(self.grandChilds)
                self.dataOfGrandChilds["\(counter)"] = self.grandChilds
                print(self.dataOfGrandChilds)
                counter += 1

                //Reloading My tableView
                self.tableView.reloadData()
            })
        }
    })
}

这是我的 viewDidLoad()。这里 dataOfGrandChilds 是一个字典，它是我的 TableView 单元格的来源。

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("toViewChilds", forIndexPath: indexPath)
    print("loading content\(self.dataOfGrandChilds)")
    if let tempData = dataOfGrandChilds[indexPath.section]
    {
        cell.textLabel?.text = tempData[indexPath.row]["Name"] as? String
    }
    return cell
}

这是我的cellForRowAtIndexPath。

问题是在 dataForGrandChilds 将内容保存在 viewDidLoad() 之前，cellForRowAtIndexPath() 正在执行。这就是为什么我不能填充 dataForGrandChilds 的值。请给我解决方案。

Answer 1

你只需要重新加载你的表格 View

yourTableView.reloadData()

在您的网络请求完成数据处理后放置此代码。

例如，您可以在 completeBlock:

的末尾添加它

override func viewDidLoad() {
    super.viewDidLoad()
    print("loaded hie \(accountId)")
    let request = SFRestAPI.sharedInstance().requestForQuery("SELECT Name,Id FROM Account where parentid='\(self.accountId)'");
    //SFRestAPI.sharedInstance().send(request, delegate: self);
    SFRestAPI.sharedInstance().sendRESTRequest(request, failBlock: {error in print(error)}, completeBlock: { responce in print(responce)
        self.dataRows = responce["records"] as! [NSDictionary]
        var counter = 0;
        for i in self.dataRows
        {
            let requestForGrandChilds = SFRestAPI.sharedInstance().requestForQuery("select Name,Id from Account where parentid='\(i["Id"]!)'")
            SFRestAPI.sharedInstance().sendRESTRequest(requestForGrandChilds,
            failBlock:
            {
                error in print(error)
                print("error block")
            },
            completeBlock:
            {
                responceChild in
                self.grandChilds = responceChild["records"] as! [NSDictionary]
                print(self.grandChilds)
                self.dataOfGrandChilds["\(counter)"] = self.grandChilds
                print(self.dataOfGrandChilds)
                counter += 1

                //RELOAD TABLE VIEW HERE
                yourTableView.reloadData()
            })
        }
    })
}