我已经在coredata中实现了后台提取，但它仍然比正常提取时冻结应用程序几秒钟。我有什么办法可以快速获取吗？看起来它仍然在前台取出，不知道代码有什么问题。
- (void)sr_executeFetchRequest:(NSFetchRequest *)request completion:(void (^)(NSArray *objects, NSError *error))completion {
NSString *loginUser=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];
AppDelegate *sharedDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSPersistentStoreCoordinator *coordinator = [sharedDelegate persistentStoreCoordinator];
NSManagedObjectContext *context = [sharedDelegate managedObjectContext];
NSManagedObjectContext *backgroundContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
backgroundContext.persistentStoreCoordinator = coordinator;
[backgroundContext performBlock:^{
// Fetch into shared persistent store in background thread
NSError *error = nil;
// NSLog(@"BG thread===== ");
NSArray *fetchedObjects = [backgroundContext executeFetchRequest:request error:&error];
[context performBlock:^{
if (fetchedObjects) {
// Collect object IDs
NSMutableArray *mutObjectIds = [[NSMutableArray alloc] initWithCapacity:[fetchedObjects count]];
for (NSManagedObject *obj in fetchedObjects) {
[mutObjectIds addObject:obj.objectID];
// NSLog(@"BG bg===== ");
}
// Fault in objects into current context by object ID as they are available in the shared persistent store
NSMutableArray *mutObjects = [[NSMutableArray alloc] initWithCapacity:[mutObjectIds count]];
for (NSManagedObjectID *objectID in mutObjectIds) {
NSManagedObject *obj = [context objectWithID:objectID];
[mutObjects addObject:obj];
// NSLog(@"BG fg===== ");
}
if (completion) {
NSArray *objects = [mutObjects copy];
completion(objects, nil);
}
} else {
if (completion) {
completion(nil, error);
}
}
}];
}];
}
我在服务器上有一些记录，当前台应用服务器的背景将发送所有记录，而从客户端我将所有数据保存到coredata。保存时我需要检查这些数据是否已经存在，有时我需要在保存之前从db中获取一些数据，但在这段时间我的应用程序被冻结，并且只有在完成所有更新和节省后才能正常工作。
Profiler跟踪https://www.dropbox.com/s/6b1gykvs1pezrcp/Instruments4.trace.zip?dl=0
保存到数据库
-(void)updateThreadEntityWithSyncDetails:(NSMutableDictionary *)inDictionary
{
NSString *loginUser=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];
AppDelegate *sharedDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context = [sharedDelegate managedObjectContext];
// NSManagedObjectContext *writerContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
// [writerContext setPersistentStoreCoordinator:[sharedDelegate persistentStoreCoordinator]];
////
//// // create main thread MOC
// context = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
// context.parentContext = writerContext;
////
NSManagedObjectContext *contextforThread = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
contextforThread.parentContext = context;
[contextforThread performBlock:^{
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setReturnsObjectsAsFaults:NO];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"ThreadInfo"
inManagedObjectContext:context];
[fetchRequest setEntity:entity];
NSPredicate *userPredicate = [NSPredicate predicateWithFormat:@"userEmail == %@",loginUser];
NSPredicate *threadPredicate = [NSPredicate predicateWithFormat:@"threadID == %@",[inDictionary valueForKey:@"thread"]];
NSPredicate *compoundPredicate = [NSCompoundPredicate andPredicateWithSubpredicates: @[userPredicate, threadPredicate]];
[fetchRequest setPredicate:compoundPredicate];
NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:nil];
for (ThreadInfo *threadInfo in fetchedObjects)
{
if([[inDictionary allKeys] containsObject:@"userEmail"])
{
if([inDictionary valueForKey:@"userEmail"]!=[NSNull null])
{
threadInfo.userEmail=[inDictionary valueForKey:@"userEmail"];
}
}
if([[inDictionary allKeys] containsObject:@"badgeValue"])
{
if([inDictionary valueForKey:@"badgeValue"]!=[NSNull null])
{
threadInfo.badgeValue=[inDictionary valueForKey:@"badgeValue"];
}
}
if([[inDictionary allKeys] containsObject:@"thread"])
{
if([inDictionary valueForKey:@"thread"]!=[NSNull null])
{
threadInfo.threadID=[inDictionary valueForKey:@"thread"];
}
}
if([[inDictionary allKeys] containsObject:@"key"])
{
if([inDictionary valueForKey:@"key"]!=[NSNull null])
{
threadInfo.threadKey=[inDictionary valueForKey:@"key"];
}
}
if([[inDictionary allKeys] containsObject:@"secret_seed"])
{
if([inDictionary valueForKey:@"secret_seed"]!=[NSNull null])
{
threadInfo.threadSecret=[NSString stringWithFormat:@"%@",[inDictionary valueForKey:@"secret_seed"]];
}
}
if([[inDictionary allKeys] containsObject:@"r_key"])
{
if([inDictionary valueForKey:@"r_key"]!=[NSNull null])
{
threadInfo.remoteKey=[inDictionary valueForKey:@"r_key"];
}
}
if([[inDictionary allKeys] containsObject:@"solicitation"])
{
if([inDictionary valueForKey:@"solicitation"]!=[NSNull null])
{
threadInfo.solicitationID=[inDictionary valueForKey:@"solicitation"];
}
}
if([[inDictionary allKeys] containsObject:@"r_secret"])
{
if([inDictionary valueForKey:@"r_secret"]!=[NSNull null])
{
threadInfo.remoteSecret=[inDictionary valueForKey:@"r_secret"];
}
}
if([[inDictionary allKeys] containsObject:@"icon_idx"])
{
if([inDictionary valueForKey:@"icon_idx"]!=[NSNull null])
{
threadInfo.avatarIconIndex=[inDictionary valueForKey:@"icon_idx"];
}
}
if([[inDictionary allKeys] containsObject:@"icon_color_idx"])
{
if([inDictionary valueForKey:@"icon_color_idx"]!=[NSNull null])
{
threadInfo.avatarColorIndex=[inDictionary valueForKey:@"icon_color_idx"];
}
}
if([[inDictionary allKeys] containsObject:@"encrypted_r_secret"])
{
if([inDictionary valueForKey:@"encrypted_r_secret"]!=[NSNull null])
{
threadInfo.encryptedRemoteSecret=[inDictionary valueForKey:@"encrypted_r_secret"];
}
}
if([[inDictionary allKeys] containsObject:@"isSystemMessage"])
{
if([inDictionary valueForKey:@"isSystemMessage"]!=[NSNull null])
{
threadInfo.isSystemMessage=[inDictionary valueForKey:@"isSystemMessage"];
}
}
if([[inDictionary allKeys] containsObject:@"ref"])
{
if([inDictionary valueForKey:@"ref"]!=[NSNull null])
{
threadInfo.systemReferenceURL=[inDictionary valueForKey:@"ref"];
}
}
if([[inDictionary allKeys] containsObject:@"url"])
{
if([inDictionary valueForKey:@"url"]!=[NSNull null])
{
threadInfo.systemMessageURL=[inDictionary valueForKey:@"url"];
}
}
if([[inDictionary allKeys] containsObject:@"thumbnailImageURL"])
{
if([inDictionary valueForKey:@"thumbnailImageURL"]!=[NSNull null])
{
threadInfo.thumbnailImageURL=[inDictionary valueForKey:@"thumbnailImageURL"];
}
}
if([[inDictionary allKeys] containsObject:@"from"])
{
if([inDictionary valueForKey:@"from"]!=[NSNull null])
{
threadInfo.receiverEmail=[inDictionary valueForKey:@"from"];
}
}
if([[inDictionary allKeys] containsObject:@"isQuiz"])
{
if([inDictionary valueForKey:@"isQuiz"]!=[NSNull null])
{
threadInfo.isQuiz=[inDictionary valueForKey:@"isQuiz"];
}
}
if([[inDictionary allKeys] containsObject:@"replied"])
{
if([inDictionary valueForKey:@"replied"]!=[NSNull null])
{
threadInfo.replied=[inDictionary valueForKey:@"replied"];
}
}
if([[inDictionary allKeys] containsObject:@"owned"])
{
if([inDictionary valueForKey:@"owned"]!=[NSNull null])
{
BOOL isOwner=[[inDictionary valueForKey:@"owned"] boolValue];
if([[inDictionary allKeys] containsObject:@"solicitation"])
{
if([inDictionary valueForKey:@"solicitation"]!=[NSNull null])
{
if(isOwner)
{
if ([[inDictionary valueForKey:@"solicitation"] isEqualToString:[inDictionary valueForKey:@"thread"]])
{
threadInfo.isRequester=[NSNumber numberWithBool:YES];
} else {
threadInfo.isSender=[NSNumber numberWithBool:YES];
}
}
else
{
// threadInfo.isProvider=[NSNumber numberWithBool:YES];
if ([[inDictionary valueForKey:@"solicitation"] isEqualToString:[inDictionary valueForKey:@"thread"]])
{
threadInfo.isProvider=[NSNumber numberWithBool:YES];
} else {
threadInfo.isReceiver=[NSNumber numberWithBool:YES];
}
}
}
else
{
if(isOwner)
{
threadInfo.isSender=[NSNumber numberWithBool:YES];
}
else
{
threadInfo.isReceiver=[NSNumber numberWithBool:YES];
}
}
}
else
{
if(isOwner)
{
threadInfo.isSender=[NSNumber numberWithBool:YES];
}
else
{
threadInfo.isReceiver=[NSNumber numberWithBool:YES];
}
}
}
}
if([[inDictionary allKeys] containsObject:@"options"])
{
if([inDictionary valueForKey:@"options"]!=[NSNull null])
{
NSMutableArray *accArray=[inDictionary valueForKey:@"options"];
NSData *arrayData = [NSKeyedArchiver archivedDataWithRootObject:accArray];
threadInfo.pollOptions = arrayData;
}
}
if([[inDictionary allKeys] containsObject:@"isAnyReceiverActivity"])
{
if([inDictionary valueForKey:@"isAnyReceiverActivity"]!=[NSNull null])
{
threadInfo.isAnyReceiverActivity=[inDictionary valueForKey:@"isAnyReceiverActivity"];
}
}
if([[inDictionary allKeys] containsObject:@"pollAnswerList"])
{
if([inDictionary valueForKey:@"pollAnswerList"]!=[NSNull null])
{
NSMutableDictionary *accDict=[inDictionary valueForKey:@"pollAnswerList"];
NSData *dictData = [NSKeyedArchiver archivedDataWithRootObject:accDict];
threadInfo.pollAnswerList = dictData;
}
}
if([[inDictionary allKeys] containsObject:@"responseCount"])
{
if([inDictionary valueForKey:@"responseCount"]!=[NSNull null])
{
threadInfo.responseCount=[inDictionary valueForKey:@"responseCount"];
}
}
if([[inDictionary allKeys] containsObject:@"isSender"])
{
if([inDictionary valueForKey:@"isSender"]!=[NSNull null])
{
threadInfo.isSender=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isSender"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"isRequester"])
{
if([inDictionary valueForKey:@"isRequester"]!=[NSNull null])
{
threadInfo.isRequester=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isRequester"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"image"])
{
if([inDictionary valueForKey:@"image"]!=[NSNull null])
{
threadInfo.image=[inDictionary valueForKey:@"image"];
}
}
if([[inDictionary allKeys] containsObject:@"isReceiver"])
{
if([inDictionary valueForKey:@"isReceiver"]!=[NSNull null])
{
threadInfo.isReceiver=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isReceiver"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"colorCode"])
{
if([inDictionary valueForKey:@"colorCode"]!=[NSNull null])
{
threadInfo.colorCode=[inDictionary valueForKey:@"colorCode"];
}
}
if([[inDictionary allKeys] containsObject:@"solicitationCount"])
{
if([inDictionary valueForKey:@"solicitationCount"]!=[NSNull null])
{
threadInfo.solicitationCount=[inDictionary valueForKey:@"solicitationCount"];
}
}
if([[inDictionary allKeys] containsObject:@"solicitationNumber"])
{
if([inDictionary valueForKey:@"solicitationNumber"]!=[NSNull null])
{
threadInfo.solicitationNumber=[inDictionary valueForKey:@"solicitationNumber"];
}
}
if([[inDictionary allKeys] containsObject:@"disliked"])
{
if([inDictionary valueForKey:@"disliked"]!=[NSNull null])
{
threadInfo.hasDislikes=[NSNumber numberWithBool:[[inDictionary valueForKey:@"disliked"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"liked"])
{
if([inDictionary valueForKey:@"liked"]!=[NSNull null])
{
threadInfo.hasLikes=[NSNumber numberWithBool:[[inDictionary valueForKey:@"liked"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"removed"])
{
if([inDictionary valueForKey:@"removed"]!=[NSNull null])
{
threadInfo.isThreadRemoved=[NSNumber numberWithBool:[[inDictionary valueForKey:@"removed"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"closed"])
{
if([inDictionary valueForKey:@"closed"]!=[NSNull null])
{
threadInfo.isThreadEnded=[NSNumber numberWithBool:[[inDictionary valueForKey:@"closed"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"blocked"])
{
if([inDictionary valueForKey:@"blocked"]!=[NSNull null])
{
threadInfo.isThreadBlocked=[NSNumber numberWithBool:[[inDictionary valueForKey:@"blocked"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"hasComments"])
{
if([inDictionary valueForKey:@"hasComments"]!=[NSNull null])
{
threadInfo.hasComments=[NSNumber numberWithBool:[[inDictionary valueForKey:@"hasComments"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"isProvider"])
{
if([inDictionary valueForKey:@"isProvider"]!=[NSNull null])
{
threadInfo.isProvider=[NSNumber numberWithBool:[[inDictionary valueForKey:@"isProvider"] boolValue]];
}
}
if([[inDictionary allKeys] containsObject:@"messageDescription"])
{
if([inDictionary valueForKey:@"messageDescription"]!=[NSNull null])
{
threadInfo.messageDescription=[inDictionary valueForKey:@"messageDescription"];
}
}
if([[inDictionary allKeys] containsObject:@"commentCount"])
{
if([inDictionary valueForKey:@"commentCount"]!=[NSNull null])
{
threadInfo.commentCount=[NSNumber numberWithInteger:[[inDictionary valueForKey:@"commentCount"] integerValue]];
}
}
if([[inDictionary allKeys] containsObject:@"threadDate"])
{
if([inDictionary valueForKey:@"threadDate"]!=[NSNull null])
{
threadInfo.threadDate=[inDictionary valueForKey:@"threadDate"];
}
}
if([[inDictionary allKeys] containsObject:@"receivedDate"])
{
if([inDictionary valueForKey:@"receivedDate"]!=[NSNull null])
{
threadInfo.receivedDate=[inDictionary valueForKey:@"receivedDate"];
}
}
if([[inDictionary allKeys] containsObject:@"closedDate"])
{
if([inDictionary valueForKey:@"closedDate"]!=[NSNull null])
{
threadInfo.closedDate=[inDictionary valueForKey:@"closedDate"];
}
}
if([[inDictionary allKeys] containsObject:@"blockedDate"])
{
if([inDictionary valueForKey:@"blockedDate"]!=[NSNull null])
{
threadInfo.blockedDate=[inDictionary valueForKey:@"blockedDate"];
}
}
if([[inDictionary allKeys] containsObject:@"threadDescription"])
{
if([inDictionary valueForKey:@"threadDescription"]!=[NSNull null])
{
threadInfo.threadMessage=[inDictionary valueForKey:@"threadDescription"];
}
}
if([[inDictionary allKeys] containsObject:@"receiverEmail"])
{
if([inDictionary valueForKey:@"receiverEmail"]!=[NSNull null])
{
threadInfo.receiverEmail=[inDictionary valueForKey:@"receiverEmail"];
}
}
if([[inDictionary allKeys] containsObject:@"to"])
{
if([inDictionary valueForKey:@"to"]!=[NSNull null])
{
id toValue=[inDictionary valueForKey:@"to"];
if([toValue isKindOfClass:[NSString class]])
{
if ([toValue rangeOfString:@"@"].location != NSNotFound)
{
threadInfo.receiverEmail=[NSString stringWithFormat:@"%@",toValue];
}
}
else
{
NSMutableArray *accArray=[NSMutableArray arrayWithArray:toValue];
NSData *arrayData = [NSKeyedArchiver archivedDataWithRootObject:accArray];
threadInfo.solicitationList = arrayData;
}
}
}
//Poll
if([[inDictionary allKeys] containsObject:@"isPoll"])
{
if([inDictionary valueForKey:@"isPoll"]!=[NSNull null])
{
threadInfo.isPoll=[inDictionary valueForKey:@"isPoll"];
}
}
if([[inDictionary allKeys] containsObject:@"type"])
{
if([inDictionary valueForKey:@"type"]!=[NSNull null])
{
threadInfo.pollType=[inDictionary valueForKey:@"type"];
}
}
if([[inDictionary allKeys] containsObject:@"scope"])
{
if([inDictionary valueForKey:@"scope"]!=[NSNull null])
{
threadInfo.pollScope=[inDictionary valueForKey:@"scope"];
}
}
if([[inDictionary allKeys] containsObject:@"isPollSender"])
{
if([inDictionary valueForKey:@"isPollSender"]!=[NSNull null])
{
threadInfo.isPollSender=[inDictionary valueForKey:@"isPollSender"];
}
}
if([[inDictionary allKeys] containsObject:@"visibility"])
{
if([inDictionary valueForKey:@"visibility"]!=[NSNull null])
{
threadInfo.pollVisibility=[inDictionary valueForKey:@"visibility"];
}
}
if([[inDictionary allKeys] containsObject:@"yesPercentage"])
{
if([inDictionary valueForKey:@"yesPercentage"]!=[NSNull null])
{
threadInfo.yesPercentage=[inDictionary valueForKey:@"yesPercentage"];
}
}
if([[inDictionary allKeys] containsObject:@"noPercentage"])
{
if([inDictionary valueForKey:@"noPercentage"]!=[NSNull null])
{
threadInfo.noPercentage=[inDictionary valueForKey:@"noPercentage"];
}
}
if([[inDictionary allKeys] containsObject:@"selectedOption"])
{
if([inDictionary valueForKey:@"selectedOption"]!=[NSNull null])
{
threadInfo.selectedOption=[inDictionary valueForKey:@"selectedOption"];
}
}
if([[inDictionary allKeys] containsObject:@"selectedStar"])
{
if([inDictionary valueForKey:@"selectedStar"]!=[NSNull null])
{
threadInfo.selectedStar=[inDictionary valueForKey:@"selectedStar"];
}
}
if([[inDictionary allKeys] containsObject:@"choice1Percentage"])
{
if([inDictionary valueForKey:@"choice1Percentage"]!=[NSNull null])
{
threadInfo.choice1Percentage=[inDictionary valueForKey:@"choice1Percentage"];
}
}
if([[inDictionary allKeys] containsObject:@"choice2Percentage"])
{
if([inDictionary valueForKey:@"choice2Percentage"]!=[NSNull null])
{
threadInfo.choice2Percentage=[inDictionary valueForKey:@"choice2Percentage"];
}
}
if([[inDictionary allKeys] containsObject:@"choice3Percentage"])
{
if([inDictionary valueForKey:@"choice3Percentage"]!=[NSNull null])
{
threadInfo.choice3Percentage=[inDictionary valueForKey:@"choice3Percentage"];
}
}
if([[inDictionary allKeys] containsObject:@"choice4Percentage"])
{
if([inDictionary valueForKey:@"choice4Percentage"]!=[NSNull null])
{
threadInfo.choice4Percentage=[inDictionary valueForKey:@"choice4Percentage"];
}
}
if([[inDictionary allKeys] containsObject:@"choice5Percentage"])
{
if([inDictionary valueForKey:@"choice5Percentage"]!=[NSNull null])
{
threadInfo.choice5Percentage=[inDictionary valueForKey:@"choice5Percentage"];
}
}
}
NSError *error;
if(![contextforThread save:&error]) {
NSLog(@"Child error : %@",error);
}
[context performBlock:^{
NSError *error;
if(![context save:&error]) {
NSLog(@"%@",error);
}
}];
}];
}
websocket //继续从服务器获取数据
- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message
{
NSDictionary *responseDict = [message JSONValue];
NSArray *bodyDicta=[responseDict objectForKey:@"body"];
for (int i=0; i<bodyDicta.count; i++) {
int responseCode=[[[[responseDict objectForKey:@"body"] objectAtIndex:i ] objectForKey:@"code"] intValue];
[self checkResponseCode:[bodyDicta objectAtIndex: i] indexvalue:responseCode isArray:1];
}
checkResponseCode
-(void)checkResponseCode:(NSDictionary *)responseDict indexvalue:(int)code isArray:(int)flag {
if(code==3608)
{
[self manageGroupDetails:responseDict];
}
if (code == 3602)// SCROLL ISSUE
{
[self updateThreadWithSyncDetails:responseDict];
}
if (code == 3603)
{
[self updateCommentWithSyncDetails:responseDict];
}
if(code==3607)// SCROLL ISSUE
{
[self updateSolicitationWithSyncDetails:responseDict];
}
}
updatePollWithSyncDetails
-(void)updatePollWithSyncDetails:(NSDictionary *)responseDict
{
BOOL isDuplicate=[[IXDataBaseManager sharedNetworkDataManager] checkForExistenceOfThreadDetailsForThreadID:[responseDict objectForKey:@"poll"]];
if(!isDuplicate)
{
[[IXDataBaseManager sharedNetworkDataManager] updateThreadEntityWithSyncDetails:detailsDict];
}
updateSolicitationWithSyncDetails
-(void)updateSolicitationWithSyncDetails:(NSDictionary *)inDictionary
{
NSMutableDictionary *paramDict=[NSMutableDictionary dictionaryWithDictionary:inDictionary];
NSString *userEmail=[[NSUserDefaults standardUserDefaults] valueForKey:@"currentUser"];
[paramDict setObject:[NSNumber numberWithBool:NO] forKey:@"isSystemMessage"];
[paramDict setObject:message forKey:@"threadDescription"];
ThreadInfo *threadInfo=[[IXDataBaseManager sharedNetworkDataManager] retrieveSolicitationInfoForThreadID:[inDictionary objectForKey:@"solicitation"]];
[paramDict setObject:threadInfo.threadID forKey:@"thread"];
[[IXDataBaseManager sharedNetworkDataManager] updateThreadEntityWithSyncDetails:paramDict];
}
}
}
答案 0 :(得分：8)
首先，您如何知道阻止您的UI的抓取？你有没有运行仪器？如果是，那么跟踪在哪里？
如果还没有，则需要停止运行仪器，使用Time Profiler查找块。使用指向跟踪的链接更新您的问题，以便下载和审核。
如果没有在“仪器”中查看此问题，您只能猜测实际问题是什么。
查看您提供的跟踪，我没有看到Core Data占用主线程（或任何其他线程）的任何大量时间。我怀疑你在这里追逐错误。
您的上述代码无法保存您的任何时间。虽然它会将对象加载到NSPersistentStoreCoordinator中，以使主NSManagedObjectContext获取它们的速度稍微快一点，但它无关紧要。根据您的时间跟踪，您不会花费任何时间在SQL上（主线程总共132ms）。
即使您的SQL调用花费了大量时间，仍然会阻止主线程，因为您在执行提取时锁定了NSPersistentStoreCoordinator。
根据您提供的跟踪，您的问题出在您的用户界面中。您的大部分时间都花在了-[IXInBoxViewController tableView;heightForRowAtIndexPath:]上，这是锁定用户界面的常见位置。钻入您的个人资料，找到昂贵的项目并进行修复。
问题不在于核心数据。我建议删除此线程代码（添加线程不是性能解决方案）并返回使用NSFetchedResultsController和UITableViewController然后配置您的UI代码并修复慢速代码。
我从服务器获取大量数据，并持续节省核心数据。 。我正在使用NSFetchedResultsController，因此必须重新加载每个存储tableview。现在我正在尝试保存少量数据，这是处理大量核心数据保存请求的正确方法吗？
您没有提供任何用于加载数据或保存数据的代码，因此无论您是否正确执行这些部分，我都无权说话。
只要加载到后台线程上的后台上下文（我更喜欢使用NSOperation子类）并保存到Core Data中，您加载的数据量就无关紧要了。除非您同时显示数据，否则NSFetchedResultsController将做正确的事情并且UI影响将是最小的。如果数据加载到NSFetchedResultsController并且它相对偏离屏幕，那么它将不会对性能产生重大影响。
运行仪器。只要性能成为问题，这就是你的第一步。
如果您的数据加载速度很慢，请隔离缓慢的行并解决它们。
如果您的保存很慢（不太可能），那么将其分成小块。
但首先要介绍一下。否则你就是在黑暗中拍摄而只是猜测。
答案 1 :(得分：1)
你有你的代码行......
backgroundContext.persistentStoreCoordinator = coordinator;
......在街区内。
在开始performBlock之前，请尝试为您的MOC设置PSC。