多次尝试找出导致致命错误的原因。但是，仍然无法弄明白。当我尝试使用pull刷新表时，第一个表（结果表）会导致此错误。第二个表（favoriteProductTableView）工作得很完美，所以我没有提供关于第二个表的任何代码。想知道为什么。谢谢你的帮助。
var followArray = [String]()
var resultsNameArray = [String]()
var resultsImageFiles = [PFFile?]()
var resultsDetailsArray = [String]()
var resultsDetailsImageFiles = [PFFile?]()
var resultsObjectID = [String]()
var resultsTitle = [String]()
var personPriceArray = [String]()
var personQuantityArray = [String]()
var personOrderTypeArray = [String]()
var refresher:UIRefreshControl!
override func viewDidLoad() {
super.viewDidLoad()
favoriteProductTableView.hidden = true
refresher = UIRefreshControl()
refresher.tintColor = UIColor.blackColor()
refresher.addTarget(self, action: "refresh", forControlEvents: UIControlEvents.ValueChanged)
self.resultsTable.addSubview(refresher)
}
override func viewDidAppear(animated: Bool) {
refreshResults()
}
func refresh(){
refreshResults()
}
func refreshResults(){
switch(segmentedControl.selectedSegmentIndex){
case 0:
followArray.removeAll(keepCapacity: false)
resultsNameArray.removeAll(keepCapacity: false)
resultsImageFiles.removeAll(keepCapacity: false)
resultsDetailsArray.removeAll(keepCapacity: false)
resultsDetailsImageFiles.removeAll(keepCapacity: false)
resultsObjectID.removeAll(keepCapacity: false)
resultsTitle.removeAll(keepCapacity: false)
personPriceArray.removeAll(keepCapacity: false)
personQuantityArray.removeAll(keepCapacity: false)
personOrderTypeArray.removeAll(keepCapacity: false)
let followQuery = PFQuery(className: "follow")
followQuery.whereKey("user", equalTo: (PFUser.currentUser()!.username)!)
followQuery.whereKey("userToFollow", notEqualTo: (PFUser.currentUser()!.username)!)
followQuery.findObjectsInBackgroundWithBlock { (objects:[PFObject]?, error: NSError?) -> Void in
if error != nil {
}
for object in objects! {
self.followArray.append(object.objectForKey("userToFollow") as! String)
}
let query = PFQuery(className: "products")
query.whereKey("userName", containedIn: self.followArray)
query.findObjectsInBackgroundWithBlock { (catchobjects:[PFObject]?, error:NSError?) -> Void in
if error != nil {
}
for catchobject in catchobjects! {
if catchobject.objectForKey("selling_price") != nil {
self.personPriceArray.append(catchobject.objectForKey("selling_price") as! String)
self.personOrderTypeArray.append("Selling")
} else {
self.personPriceArray.append(catchobject.objectForKey("buying_price") as! String)
self.personOrderTypeArray.append("Buying")
}
self.personQuantityArray.append(catchobject.objectForKey("quantity") as! String)
self.resultsNameArray.append(catchobject.objectForKey("unique_username") as! String)
self.resultsImageFiles.append(catchobject.objectForKey("profile_picture") as? PFFile)
self.resultsDetailsArray.append(catchobject.objectForKey("details") as! String)
self.resultsDetailsImageFiles.append(catchobject.objectForKey("detailsImage") as? PFFile)
self.resultsTitle.append(catchobject.objectForKey("title") as! String)
self.resultsObjectID.append(catchobject.objectId!)
}
dispatch_async(dispatch_get_main_queue()) {
self.resultsTable.reloadData()
}
self.loadEmptyLabel(self.resultsTable)
}
self.refresher.endRefreshing()
}
break
case 1:
...
break
default:
break
}
}
func loadEmptyLabel(tableView: UITableView) {
let emptyLabel = UILabel(frame: CGRectMake(0, 0, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
emptyLabel.textAlignment = NSTextAlignment.Center
emptyLabel.textColor = UIColor.blackColor()
emptyLabel.text = "No matched result found."
tableView.backgroundView = emptyLabel
tableView.separatorStyle = UITableViewCellSeparatorStyle.None
var resultCount = Int()
if tableView == resultsTable {
resultCount = resultsNameArray.count
} else {
resultCount = resultsTitleArray.count
}
if resultCount == 0 {
tableView.reloadData()
emptyLabel.hidden = false
} else {
emptyLabel.hidden = true
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
var numRow: Int = 0
switch(segmentedControl.selectedSegmentIndex){
case 0:
numRow = resultsNameArray.count
break
case 1:
numRow = resultsTitleArray.count
break
default:
break
}
return numRow
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if tableView == resultsTable {
let cell:favoritedTableViewCell = resultsTable.dequeueReusableCellWithIdentifier("Cell") as! favoritedTableViewCell
cell.profileLbl.text = self.resultsNameArray[indexPath.row]
cell.messageTxt.text = self.resultsDetailsArray[indexPath.row]
cell.priceLabel.text = "\(self.personOrderTypeArray[indexPath.row]) \(self.personQuantityArray[indexPath.row]) for $\(self.personPriceArray[indexPath.row])"
cell.titleLabel.text = self.resultsTitle[indexPath.row]
if resultsImageFiles[indexPath.row] != nil {
resultsImageFiles[indexPath.row]!.getDataInBackgroundWithBlock { (imageData:NSData?, error:NSError?) -> Void in
if error == nil{
let image = UIImage(data: imageData!)
cell.imgView.image = image
}
}
} else {
cell.imgView.image = UIImage(named: "Profile Picture")
}
if resultsDetailsImageFiles[indexPath.row] != nil{
resultsDetailsImageFiles[indexPath.row]?.getDataInBackgroundWithBlock({ (imageData:NSData?, error:NSError?) -> Void in
if error == nil{
let image = UIImage(data: imageData!)
cell.detailsImg.image = image
}
})
} else {
cell.detailsImg.image = UIImage(named: "Profile Picture")
}
return cell
} else {
....
}
}
答案 0 :(得分：1)
您的numberOfRowsInSection函数会根据segmentedControl.selectedSegmentIndex返回两个数组长度中的一个，而cellForRowAtIndexPath会根据显示的tableView对数组进行索引。这看起来并不正确，特别是考虑到你的引用“它似乎没有在任何地方填充 - 如果它只是resultsTitle？”。
此外，您正在从后台线程中调用self.resultsTable.reloadData()。这很糟糕 - 必须使用以下命令从主线程调用：
dispatch_async(dispatch_get_main_queue()) {
self.resultsTable.reloadData()
}
尽管如此，我们还不清楚你为什么在循环中得到这个。