“索引超出范围”虽然刷新表 - 斯威夫特

Question

我有两个按钮在视图控制器和它们下面的表视图。当两个按钮中的一个按下不同的过滤器参数时，表格视图被刷新。实际上，当表格视图被加载，然后点击另一个按钮时，它工作正常，表格被刷新。但是，当您在表格视图中滚动并且滚动仍在进行时，您按下另一个按钮时，出现“索引超出范围”错误。试了很多东西来解决它，但没有办法。有任何想法吗？我使用解析作为免费会员资格。我的代码的重要部分是如下：

@IBAction func filterType0_clicked(sender: AnyObject) { 

    if filterTypeVar != 0 { 


     self.activityIndicator.startAnimating() 
     self.waitView.hidden = false 

    filterTypeVar = 0 
    refreshResults() 
    } 
} 

@IBAction func filterType1_clicked(sender: AnyObject) { 

    if filterTypeVar != 1 { 

     self.activityIndicator.startAnimating() 
     self.waitView.hidden = false 

    filterTypeVar = 1 
    refreshResults() 
    } 
} 



func refreshResults() { 


    resultsNameArray.removeAll(keepCapacity: false) 
    resultsUserNameArray.removeAll(keepCapacity: false) 
    resultsObjectIdArray.removeAll(keepCapacity: false) 


    var query = PFQuery(className: “posts”) 
    query.whereKey("userName", containedIn: usersArray) 

    if filterTypeVar == 0 { 
    println("no filter") 
    } 
    else { 
    query.whereKey("Type", equalTo: filterTypeVar) 
    } 

    query.addDescendingOrder("createdAt") 
    query.limit = 10 

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

     if error == nil { 

      for object in objects! { 

       self.resultsNameArray.append(object.objectForKey("profileName") as! String) 
       self.resultsUserNameArray.append(object.objectForKey("userName") as! String) 
       self.resultsObjectIdArray.append(object.objectId as String!) 

         self.resultsTable.reloadData() 

      } 

      if self.resultsNameArray.isEmpty { 
      self.resultsTable.hidden = true 
      } 

      else { 
      self.resultsTable.hidden = false 
      } 



      self.activityIndicator.stopAnimating() 
      self.waitView.hidden = true 


     } 

    } 

} 



func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 


    return resultsNameArray.count 

} 



func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 

      return 127 

} 






func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 

    var cell:mainCell = tableView.dequeueReusableCellWithIdentifier("Cell") as! mainCell 



    cell.profileLbl.setTitle(self.resultsNameArray[indexPath.row], forState: UIControlState.Normal) 
    cell.usernameLbl.text = self.resultsUserNameArray[indexPath.row] 
    cell.objectid.text = self.resultsObjectIdArray[indexPath.row] 


    return cell 

} 

Answer 1

尝试重装表数据后您已经完成读取和填写的数据数组。另外，清除您的数据阵列一次您有您的查询数据。

例如，在你的refreshResults方法，移动for循环的self.resultsTable.reloadData()外：

resultsNameArray.removeAll(keepCapacity: false) 
resultsUserNameArray.removeAll(keepCapacity: false) 
resultsObjectIdArray.removeAll(keepCapacity: false) 
// You could reload again here; this might be superfluous. 
self.resultsTable.reloadData() 

for object in objects! { 

    self.resultsNameArray.append(object.objectForKey("profileName") as! String) 
    self.resultsUserNameArray.append(object.objectForKey("userName") as! String) 
    self.resultsObjectIdArray.append(object.objectId as String!) 
} 

// Moved the refresh outside of loop so that you 
// aren't reloading the table until you've finished 
// loading your data. 
self.resultsTable.reloadData()