昨天Apple审核并接受了我们提交的应用版本。 除了我们已经解决的一些问题，还有一个崩溃报告让我发疯。
这是Fabric崩溃报告堆栈跟踪：
Crashed: com.apple.main-thread
0 xxxxxxxxxxxxxxxxx 0xb7444 ForecastCollectionViewController.(locationHelper(didReceiveUpdatedLocationWithObjectID : NSManagedObjectID, finishedLoading : Bool) -> ()).(closure #1) (ForecastCollectionViewController.swift:82)
1 xxxxxxxxxxxxxxxxx 0xb61d4 ForecastCollectionViewController.(locationHelper(didReceiveUpdatedLocationWithObjectID : NSManagedObjectID, finishedLoading : Bool) -> ()).(closure #1) (ForecastCollectionViewController.swift:1219)
2 libdispatch.dylib 0x23c27cbf _dispatch_call_block_and_release + 10
3 libdispatch.dylib 0x23c27cab _dispatch_client_callout + 22
4 libdispatch.dylib 0x23c2c559 _dispatch_main_queue_callback_4CF + 1532
5 CoreFoundation 0x24057755 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
6 CoreFoundation 0x24055c4f __CFRunLoopRun + 1590
7 CoreFoundation 0x23fa41c9 CFRunLoopRunSpecific + 516
8 CoreFoundation 0x23fa3fbd CFRunLoopRunInMode + 108
9 GraphicsServices 0x255c0af9 GSEventRunModal + 160
10 UIKit 0x286dc435 UIApplicationMain + 144
11 xxxxxxxxxxxxxxxxx 0xd59c8 main (AppDelegate.swift:17)
12 libdispatch.dylib 0x23c50873 (Missing)
堆栈跟踪显示应用程序在第82行崩溃，看起来像这样：
lazy var appDelegate = {() -> AppDelegate in
return UIApplication.sharedApplication().delegate as! AppDelegate
}()
它还说函数locationHelper（didReceiveUpdatedLocationWithObjectID：NSManagedObjectID，finishedLoading：Bool）是一个调用应用程序委托，然后导致应用程序崩溃。
func locationHelper(didReceiveUpdatedLocationWithObjectID locationID: NSManagedObjectID, finishedLoading: Bool) {
dispatch_async(dispatch_get_main_queue()) {
guard let location = self.appDelegate.managedObjectContext.objectWithID(locationID) as? LastVisited else {
// Set updating status back to false
self.updating = false
// Stop refresh control animation
self.stopRefreshControlAnimation(withSuccess: false) {
// Custom error
let errorDescription = NSLocalizedString("error", comment: "Show general error")
let errorMessage = Murmur(title: errorDescription, backgroundColor: Colors.sharedInstance.error, titleColor: .whiteColor(), font: UIFont.systemFontOfSize(13))
Whistle(errorMessage, action: .Present)
}
return
}
// Changes only made if is first loading action
if self.isInitial {
// Set tab bar active
self.tabBarEnabled(active: true)
// Set initial to false
self.isInitial = false
}
// Append received location to current location variable
self.currentLocation = location
// Set search bar title
var stringInSearchBar = "\(location.city)"
if location.iso != "-" {
stringInSearchBar = "\(stringInSearchBar), \(location.iso)"
}
var args = [String:AnyObject]()
args[NSForegroundColorAttributeName] = UIColor.whiteColor()
self.searchBar.setAttributedPlaceholder(stringInSearchBar, withAttributes: args)
// Data changes
if let data = location.offlineData {
// Set new background if it has changed
self.setBackgroundImage(withName: data.background!)
// Set new background global variable
GlobalSettings.sharedInstance.background = data.background!
// Set new color model
self.setColorModel(withPictocode: data.pictocode, daylight: data.daylight)
print(data.pictocode)
// Set last updated label
self.dateFormatter.dateStyle = .ShortStyle
self.dateFormatter.timeStyle = .ShortStyle
self.dateFormatter.timeZone = nil
self.refreshControlView.lastUpdatedLabel.text = self.dateFormatter.stringFromDate(data.timestamp!)
// Remove tab bar items if not available
if let meta = data.meta {
// Check if tab bar controller has been passed in objects dic
if let tabBarController = self.tabBarController, let currentControllers = tabBarController.viewControllers {
// Assign view controller array to local variable on initial start
var animated = true
var newViewControllers = [UIViewController]()
// Assign view controller array to local variable on initial start
let where2go = Where2GoViewController()
let wind = WindViewController()
newViewControllers.append(currentControllers[0])
newViewControllers.append(wind)
newViewControllers.append(where2go)
guard let satellite = meta.satelliteDomain, let radar = meta.radarDomain else {
// If not able to bind sat/rad values set standard views anyway
tabBarController.setViewControllers(newViewControllers, animated: true)
return
}
if satellite != "" {
let vc = SatelliteViewController()
newViewControllers.insert(vc, atIndex: 2)
}
if radar != "" {
let vc = RadarViewController()
if newViewControllers.count >= 4 {
newViewControllers.insert(vc, atIndex: 3)
} else {
newViewControllers.insert(vc, atIndex: 2)
}
}
if currentControllers.count == newViewControllers.count {
animated = false
}
tabBarController.setViewControllers(newViewControllers, animated: animated)
}
}
}
// Reload collection view
if self.collectionView!.dragging || self.collectionView!.decelerating {
self.deferredReloading = true
} else {
self.collectionView?.reloadData()
}
// Stop reload
if finishedLoading {
self.stopRefreshControlAnimation(withSuccess: true, completionHandler: nil)
}
// Set updating status back to false
self.updating = false
// Set location helper to nil
self.locationHelper = nil
// Save core data
self.appDelegate.saveContext()
}
}
我的两个猜测是：
locationHelper中的objectWithID（didReceiveUpdatedLocationWithObjectID locationID：NSManagedObjectID，finishedLoading：Bool）导致导致崩溃的异常
线程
有谁知道问题可能是什么？