0
有時它給這個Coredata隨機崩潰1560年，1550
2017-07-25 11:57:51.839 Test[14097:17556837] CoreData: error: Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. -[__NSCFSet addObject:]: attempt to insert nil with userInfo (null)
2017-07-25 11:57:51.852 Test[14097:17556837] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFSet addObject:]: attempt to insert nil'
*** First throw call stack:
(
0 CoreFoundation 0x01573a94 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x00c9be02 objc_exception_throw + 50
2 CoreFoundation 0x015739bd +[NSException raise:format:] + 141
3 CoreFoundation 0x01449d69 -[__NSCFSet addObject:] + 185
4 CoreData 0x010c8e00 -[NSManagedObjectContext(_NSInternalChangeProcessing) _processPendingInsertions:withDeletions:withUpdates:] + 560
5 CoreData 0x010c3a1c -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 2204
6 CoreData 0x010c3166 -[NSManagedObjectContext processPendingChanges] + 54
7 CoreData 0x01096355 _performRunLoopAction + 357
8 CoreFoundation 0x0148d77e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
9 CoreFoundation 0x0148d6de __CFRunLoopDoObservers + 398
10 CoreFoundation 0x0148305c __CFRunLoopRun + 1340
11 CoreFoundation 0x01482866 CFRunLoopRunSpecific + 470
12 CoreFoundation 0x0148267b CFRunLoopRunInMode + 123
13 GraphicsServices 0x0801e664 GSEventRunModal + 192
14 GraphicsServices 0x0801e4a1 GSEventRun + 104
15 UIKit 0x01e5dcc1 UIApplicationMain + 160
16 Test 0x000f3a2b main + 75
17 libdyld.dylib 0x0496fa21 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
有時是給我這個
fatal error: Failure to save context: Error Domain=NSCocoaErrorDomain Code=1550 「The operation couldn’t be completed. (Cocoa error 1550.)」 UserInfo={NSLocalizedDescription=The operation couldn’t be completed. (Cocoa error 1550.), Dangling reference to an invalid object.=null, NSValidationErrorObject=<Test.Article: 0x7c191030> (entity: Article; id: 0x7c1927d0 <x-coredata:///Article/t8BA04531-EB12-479D-9C0E-FF22ADE34A62201> ; data: {
category = 「0x7aeecc30 <x-coredata://5095458E-7D52-4717-A948-E58E1C13176D/Category/p27>「;
categoryID = 5;
content = (
「0x7c457250 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62202>「,
「0x7c18b890 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62203>「,
「0x7c454840 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62204>」
);
featuredImage = 「600x600(19).jpg」;
id = 1;
issueID = 1;
mainImage = 「1.jpg」;
state = downloaded;
title = 「New Title」;
version = 「1.0」;
}), NSAffectedObjectsErrorKey=(
「<Test.Content: 0x7c454880> (entity: Content; id: 0x7c454840 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62204> ; data: {\n article = nil;\n content = \「<p>New Content For Testing</p>\「;\n imageID = nil;\n ordering = 3;\n typeID = Paragraphs;\n})」
), NSValidationErrorKey=content, NSValidationErrorValue=Relationship ‘content’ on managed object (0x7c191030) <Test.Article: 0x7c191030> (entity: Article; id: 0x7c1927d0 <x-coredata:///Article/t8BA04531-EB12-479D-9C0E-FF22ADE34A62201> ; data: {
category = 「0x7aeecc30 <x-coredata://5095458E-7D52-4717-A948-E58E1C13176D/Category/p27>「;
categoryID = 5;
content = (
「0x7c457250 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62202>「,
「0x7c18b890 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62203>「,
「0x7c454840 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62204>」
);
featuredImage = 「600x600(19).jpg」;
id = 1;
issueID = 1;
mainImage = 「1.jpg」;
state = downloaded;
title = 「New Title」;
version = 「1.0」;
}) with objects {(
<Test.Content: 0x7c459270> (entity: Content; id: 0x7c457250 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62202> ; data: {
article = nil;
content = 「<p>Another Content with <p> Tag</p>「;
imageID = nil;
ordering = 1;
typeID = Introduction;
}),
<Test.Content: 0x7c190cf0> (entity: Content; id: 0x7c18b890 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62203> ; data: {
article = nil;
content = 「Last Content」;
imageID = nil;
ordering = 2;
typeID = Illustration;
}),
<Test.Content: 0x7c454880> (entity: Content; id: 0x7c454840 <x-coredata:///Content/t8BA04531-EB12-479D-9C0E-FF22ADE34A62204> ; data: {
article = nil;
content = 「<p>New Content For Testing</p>「;
imageID = nil;
ordering = 3;
typeID = Paragraphs;
})
)}, NSValidationErrorShouldAttemptRecoveryKey=true}: file /Users/user/Documents/Development/Test/Test/Issues/IssuesViewController.swift, line 322
我相信這是由於併發性，而且是不確定的關係 以下是文章和內容模型
這裏是主要的API。我是否正確使用執行塊？我應該使用它嗎？我是否過度使用它？
func getArticleDetailsForArticleId(whereArticleId articleId: String, andCategoryObj categoryObj: Category)
{
//let issue = (Array(categoryObj.issue!) as! [Issue])[0]
let group = /*issue.articleDispatchGroup*/categoryObj.issue!.articleDispatchGroup
let queue = /*issue.articleQueue*/categoryObj.issue!.articleQueue
var errors = /*issue.articleErrors*/categoryObj.issue!.articleErrors
group.enter()
let privateMOC = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
privateMOC.parent = (UIApplication.shared.delegate as! AppDelegate).managedObjectContext
group.enter()
privateMOC.perform {
categoryObj.state = State.downloading.rawValue
do {
try privateMOC.save()
privateMOC.parent!.perform {
do {
try privateMOC.parent!.save()
} catch {
fatalError("Failure to save context: \(error)")
}
}
} catch {
fatalError("Failure to save context: \(error)")
}
}
print("saved category is downloading")
DataManager.sharedInstance.getArticleDetails(whereArticleId: articleId, andCompletionHandler: { (success, response) in
let privateMOC = NSManagedObjectContext(concurrencyType: .privateQueueConcurrencyType)
privateMOC.parent = (UIApplication.shared.delegate as! AppDelegate).managedObjectContext
print("I am articleId \(articleId)")
// SVProgressHUD.dismiss()
//self.apiInProgress = false
if success
{
privateMOC.perform/* queue.async*/{
let articleDetail = response.responseData as! Article
articleDetail.state = State.downloaded.rawValue
//queue.async {
//categoryObj.addToArticles(articleDetail)
//categoryObj.
//categoryObj.addToArticles(articleDetail)
let articles = NSMutableOrderedSet(orderedSet: categoryObj.articles!)
for content in Array(articleDetail.content!)
{
(content as! Content).article = articleDetail // should I add this line or the inverse relatioship is enough to set this
//privateMOC.parent?.insert(content as! Content)
}
// privateMOC.parent?.insert(articleDetail)
//articleDetail.content = NSOrderedSet(array: articleDetail.contents!)
articles.add(articleDetail)
categoryObj.articles = articles
//articleDetail.category = categoryObj
//categoryObj.theArticles.append(articleDetail)
categoryObj.issue!.articlesDownloaded += 1//categoryObj.issue?.articlesDownloaded += 1
let progress = CGFloat(categoryObj.issue!.articlesDownloaded)/CGFloat(categoryObj.issue!.articlesCount)
OperationQueue.main.addOperation({
self.issuesToProgressDictionary[categoryObj.issue!]?.pathFromProgress(whereProgress: progress,andFillColor: UIColor(red: 64/1255.0, green: 121/255.0, blue: 117/255.0, alpha: 0.4),andStrokeColor: UIColor.clear)
categoryObj.state = State.downloaded.rawValue
//(UIApplication.shared.delegate as! AppDelegate).saveContext()
})
do {
try privateMOC.save()
privateMOC.parent!.perform {
do {
try privateMOC.parent!.save()
} catch {
let categoryObjec = categoryObj
let articDet = articleDetail
fatalError("Failure to save context: \(error)")
}
}
} catch {
fatalError("Failure to save context: \(error)")
}
}
}
else
{
queue.async {
errors.append(response.responseError!.errorMessage!)
}
let alert = UIAlertController(title: "OOPS", message: response.responseError?.errorMessage, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .cancel, handler: nil))
alert.addAction(UIAlertAction(title: "Try Again", style: .default, handler: { (action) in
self.getIssues()
}))
self.present(alert, animated: true, completion: nil)
}
group.leave()
})
}
下面是一個示例NSManagedObject：第
//
// Article+CoreDataClass.swift
//
//
// Created by User on 7/12/17.
//
//
import Foundation
import CoreData
import ObjectMapper
//@objc(Article)
public class Article: NSManagedObject, Mappable {
var contents : [Content]?
//var content: NSOrderedSet?
required public init?(map: Map) {
let context = (UIApplication.shared.delegate as! AppDelegate).managedObjectContext
let entity = NSEntityDescription.entity(forEntityName: "Article", in: context)
super.init(entity: entity!, insertInto: context)
self.mapping(map: map)
self.content = NSOrderedSet(array: self.contents!)
}
// }
}
override init(entity: NSEntityDescription, insertInto context: NSManagedObjectContext?) {
super.init(entity: entity, insertInto: (UIApplication.shared.delegate as! AppDelegate).managedObjectContext)
}
//private override init(){}
public func mapping(map: Map)
{
featuredImage <- map["FeaturedImage"]
issueID <- map["IssueID"]
mainImage <- map["MainImage"]
title <- map["Title"]
version <- map["Version"]
categoryID <- map["categoryID"]
id <- map["ArticleID"]
contents <- map["Content"]
//content = NSOrderedSet(array: map["Content"] as! [Content])
state = State.nothing.rawValue
}
}
我試着添加這個 讓categoryObj = privateMOC.parent！.object（with：categoryObj.objectID）as！類別 - 只是在DataManager.sharedInstance.getArticleDetails {} //裏面沒有區別 – thirdage
你確定當前線程中的「categoryObj.objectID」？我認爲方法getArticleDetails的complitionHandler在主線程上被調用，但請求在後臺線程上執行。如果不是這樣，可能是我錯了。 –
我想你應該從getArticleDetails方法返回complitionHandler UID數組（不是對象數組）。 –