下面是我的一个应用程序中不断发生的崩溃的堆栈跟踪。我不知道如何解决它,它并不总是发生?请帮助:)
这和Swift Generics有关系吗?
Thread : Crashed: com.apple.main-thread
0 MyApp 0x1000f4f5c specialized FriendsTableViewController.tableView(UITableView, cellForRowAtIndexPath : NSIndexPath) -> UITableViewCell (FriendsTableViewController.swift)
1 MyApp 0x1000f1f60 @objc FriendsTableViewController.tableView(UITableView, cellForRowAtIndexPath : NSIndexPath) -> UITableViewCell (FriendsTableViewController.swift)
2 UIKit 0x1867ad31c -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 692
3 UIKit 0x1867ad484 -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 80
4 UIKit 0x18679c9b8 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2824
5 UIKit 0x186539208 -[UITableView _setNeedsVisibleCellsUpdate:withFrames:] + 240
6 UIKit 0x1865390d0 -[UITableView _rectChangedWithNewSize:oldSize:] + 996
7 UIKit 0x186546df4 -[UITableView setBounds:] + 256
8 UIKit 0x18647a2bc -[UIScrollView setContentOffset:] + 424
9 UIKit 0x1865382bc -[UITableView setContentOffset:] + 300
10 UIKit 0x186780a3c -[UIScrollView(UIScrollViewInternal) _adjustContentOffsetIfNecessary] + 60
11 UIKit 0x18677ab5c -[UIScrollView _updateForChangedScrollRelatedInsets] + 48
12 UIKit 0x18651d5ac -[UIScrollView setContentInset:] + 116
13 UIKit 0x186546c50 -[UITableView setContentInset:] + 132
14 UIKit 0x1865bf250 -[UIScrollView(UIScrollViewInternal) _adjustForAutomaticKeyboardInfo:animated:lastAdjustment:] + 348
15 UIKit 0x1865bf0b8 -[UITableView _adjustForAutomaticKeyboardInfo:animated:lastAdjustment:] + 108
16 UIKit 0x186d50380 -[UIAutoRespondingScrollViewControllerKeyboardSupport _adjustScrollViewForKeyboardInfo:] + 288
17 Foundation 0x18211e44c __NSFireDelayedPerform + 428
18 CoreFoundation 0x1817215f4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 28
19 CoreFoundation 0x181721298 __CFRunLoopDoTimer + 884
20 CoreFoundation 0x18171e9ac __CFRunLoopRun + 1520
21 CoreFoundation 0x18164d680 CFRunLoopRunSpecific + 384
22 GraphicsServices 0x182b5c088 GSEventRunModal + 180
23 UIKit 0x1864c4d90 UIApplicationMain + 204
24 MyApp 0x100094ef8 main (AppDelegate.swift:15)
25 libdispatch.dylib 0x1811ee8b8 (Missing
沿着的是cellForRow函数
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if indexPath.section < 2 {
let cell = tableView.dequeueReusableCellWithIdentifier("FriendCell", forIndexPath: indexPath) as! FriendTableViewCell
cell.tag = indexPath.row
var user: TetherUser!
if searching {
user = searchedUsers[indexPath.row]
} else {
if indexPath.section == 0 {
user = users[indexPath.row]
cell.actionButton.friendIsContact = false
} else if indexPath.section == 1 {
user = contactsWithApp[indexPath.row]
cell.actionButton.friendIsContact = true
}
}
user.tag = indexPath.row
cell.nameLabel.text = user.fullName
cell.profileImageView.image = nil
user.profileImage { (image) -> Void in
if user.tag == cell.tag {
cell.profileImageView.image = image
}
}
if let currentUserID = TetherManager.sharedInstance.currentTetherUser?.objectId {
cell.actionButton.type = user.relationToUserWithID(currentUserID)
cell.actionButton.tag = indexPath.row
cell.actionButton.delegate = self
switch user.relationToUserWithID(currentUserID) {
case .None:
cell.actionButton.button.setImage(UIImage(named: "AddFriend"), forState: .Normal)
break
case .SentFriendRequest:
cell.actionButton.button.setImage(UIImage(named: "ReceivedFriendRequest"), forState: .Normal)
break
case .ReceivedFriendRequest:
cell.actionButton.button.setImage(UIImage(named: "PendingFriendRequest"), forState: .Normal)
break
case .Friends:
cell.actionButton.button.setImage(UIImage(named: "RemoveFriend"), forState: .Normal)
break
}
}
return cell
} else {
//Contacts
let cell = tableView.dequeueReusableCellWithIdentifier("ContactCell", forIndexPath: indexPath) as! ContactTableViewCell
cell.contact = addressBookContacts[indexPath.row]
cell.delegate = self
return cell
}
}
3条答案
按热度按时间jtoj6r0c1#
我也有这个“专业”的错误。这些崩溃只发生在iOS 8.0和8.1上。这是堆栈跟踪的一部分。
我尝试下载一个iOS模拟器与这些版本和测试再次。原来崩溃是因为使用了强制解包的var,但在
traitCollectionDidChange
函数中找到了nil
。因此,这里的教训只是错误消息中的
specialized
函数可能没有指向确切的问题。你可以试着更深入地研究这个函数,看看哪里出了问题。希望能帮上忙。:)
vwkv1x7d2#
您需要为indexPath.section == 2的情况创建User对象,因为您有3个节。您需要确保在此代码块中正确初始化了“user”对象(请参阅代码中的内联注解)
lnlaulya3#
从我调试的代码中看到的一个类似问题来看,“specialized”行似乎意味着,虽然它是报告最后一个跟踪的地方,但真实的崩溃来自堆栈跟踪中的下一行(在您的情况下,仍然是在SystemsTableViewControllercellForRow中)