2015-05-09 43 views
-1

當我運行iOS模擬器時,我的代碼有問題。它打破並帶我到代碼行:let targetUser = users[indexPath.row]並說'EXC_BAD_INSTRUCTION(CODE = EXC_1386_INVOP,snbcode = 0x0)'任何人都可以幫助我找出原因嗎?Swift - 數組索引超出範圍警告

class OverviewTableViewController: UITableViewController { 


@IBOutlet weak var LogoutButton: UIBarButtonItem! 
@IBOutlet weak var ChoosePartnerButton: UIBarButtonItem! 

var rooms = [PFObject]() 
var users = [PFUser]() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    self.navigationItem.setLeftBarButtonItem(LogoutButton, animated: false) 
    self.navigationItem.setRightBarButtonItem(ChoosePartnerButton, animated: false) 
} 


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

    if PFUser.currentUser() != nil { 
     loadData() 
    } 


} 

func loadData() { 
    rooms = [PFObject]() 
    users = [PFUser]() 

    self.tableView.reloadData() 

    let pred = NSPredicate(format: "user1 = %@ OR user2 = %@", PFUser.currentUser()!, PFUser.currentUser()!) 

    let roomQuery = PFQuery(className: "Room", predicate: pred) 
    roomQuery.includeKey("user1") 
    roomQuery.includeKey("user2") 

    roomQuery.findObjectsInBackgroundWithBlock { (results:[AnyObject]?, error:NSError?) -> Void in 
     if error == nil { 
      self.rooms = results as! [PFObject] 

      for room in self.rooms { 
       let user1 = room.objectForKey("user1") as! PFUser 
       let user2 = room["user2"] as! PFUser 

       if user1.objectId != PFUser.currentUser()?.objectId { 
        self.users.append(user1) 
       } 

       if user2.objectId != PFUser.currentUser()?.objectId { 
        self.users.append(user2) 
       } 

      } 

      self.tableView.reloadData() 


     } 
    } 


} 


    // MARK: - Table view data source 

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int { 
    // Return the number of sections. 
     return 1 
    } 

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     // Return the number of rows in the section. 
     return rooms.count 
    } 

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { 
    return 80 
} 



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

    let targetUser = users[indexPath.row] 

    cell.nameLabel.text = targetUser.username 



return cell 
} 
+0

您是否嘗試過取出loadData函數頂部的self.tableView.reloadData(),因爲此時您的用戶數組未填充 – Gismay

+1

也許numberOfRowsInSection應返回'users.count'而不是'rooms。計數? –

+0

@Gismay對不起,我嘗試了,但它沒有奏效謝謝,但你的猜測比我的好。馬丁,你是英雄!謝謝,這工作! –

回答

0

聽起來像@MartinR釘了它。您正在閱讀numberOfRowsInSection中的rooms.count,但隨後從cellForRowAtIndexPath中的用戶數組中查找數據。

您可以在調試器中通過在崩潰時檢查indexPath.row並檢查rooms.count的大小來了解這一點。

+0

他的確是現場。謝謝你的回覆鄧肯。我現在將查看調試器並弄清楚,以便下次我知道我在找什麼。感謝迴應! –

+0

您既可以在調試區查看變量視圖,也可以輸入類似'expr rooms.count'和'expr indexPath.row'的命令(其中「expr」是「expression」的縮寫,命令用於評估表達式並顯示其結果。) –