Question

我正在使用以下方法从核心获取数据。我的应用冻结了

      NSArray *fetchResult = [self.managedObjectContext executeFetchRequest:request error:&error];

有时它有效，有时它只是冻结而没有错误消息或崩溃。当我暂停调试器时，它停在上面的代码行！我不使用线程也不使用块。

-(NSArray *)getSubContent
{
NSEntityDescription *desc;
NSPredicate *predicate;
NSSortDescriptor *sortDescriptor;
switch ([tableSelector selectedSegmentIndex])
{
    case 0: //fav list 
        desc = [NSEntityDescription entityForName:@"Contact" inManagedObjectContext:self.managedObjectContext];
        predicate = [NSPredicate predicateWithFormat:@"isFavorite = %@",[NSNumber numberWithBool:YES]];
        sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];
        break;
    case 1:  //Rassayel list
        desc = [NSEntityDescription entityForName:@"Contact" inManagedObjectContext:self.managedObjectContext];
        sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];

        predicate = [NSPredicate predicateWithFormat:@"isApp = %@",[NSNumber numberWithBool:YES]];
        break;
    case 2: //group list
        desc = [NSEntityDescription entityForName:@"Group" inManagedObjectContext:self.managedObjectContext];
        predicate = nil;
        sortDescriptor = nil;
        break;


    default:
        break;
}

NSFetchRequest *request = [[NSFetchRequest alloc] init] ;
[request setEntity:desc];
[request setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];
[request setPredicate:predicate];

NSError *error = nil;
NSArray *fetchResult = [self.managedObjectContext executeFetchRequest:request error:&error];
if ( error )
    NSLog(@"%@",error);
return fetchResult;

}

CRASH LOG

异常类型：00000020例外代码：0x8badf00d突出显示的主题：0

特定应用信息：com.takarub.rasayl无法启动   及时

经过的总CPU时间（秒）：1.620（用户1.620，系统0.000），3％   CPU Elapsed应用程序CPU时间（秒）：0.432,1％CPU

线程0名称：Dispatch queue：com.apple.main-thread

线程0：

0 libsystem_kernel.dylib 0x32b800d8 __psynch_mutexwait + 24

1 libsystem_c.dylib 0x34eaa674 pthread_mutex_lock + 376

2 CoreData 0x327dbd52 - [_ PFLock lock] + 18

3 CoreData 0x327eb1f2    - [NSPersistentStoreCoordinator executeRequest：withContext：error：] + 806

4 CoreData 0x327e9c22 - [NSManagedObjectContext   executeFetchRequest：error：] + 598

5 RassayelV1.0 0x000193ec - [ContactsViewController   getSubContent]（ContactsViewController.m：225）

应用程序在executeFetchRequest上冻结

0 个答案: