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我使用这种方法删除coredata根据id,但这个数组retilure所有time.i获取所有数据在fetchRequest但结果来到零;请帮帮我。如何删除特定的索引值形式的核心数据,我存储所有数据根据索引
NSArray* resultss = [appDelegate1.managedObjectContext executeFetchRequest:fetchRequest error:&error];
// Here is my code
AppDelegate *appDelegate=(AppDelegate *)[[UIApplication sharedApplication] delegate];
NSManagedObjectContext *context=[appDelegate managedObjectContext];
NSEntityDescription *path=[NSEntityDescription entityForName:@"Add_Article" inManagedObjectContext:appDelegate1.managedObjectContext];
NSPredicate *deleteParti = [NSPredicate predicateWithFormat:@"alternate_id == %@",str_articleid];
[fetchAllData setPredicate:deleteParti];
NSArray* resultss = [appDelegate1.managedObjectContext executeFetchRequest:fetchRequest error:&error];
NSArray *getAlldata = [delegate.managedObjectContext executeFetchRequest:fetchAllData error:&error];
if([getAlldata count] == 0)
{
NSLog(@"no found data");
}
else
{
for(NSManagedObject *objectName in getAlldata)
{
[delegate.managedObjectContext deleteObject:objectName];
}
NSError *error;
[delegate.managedObjectContext save:&error];
}
it'not工作。请帮助我
你好,先生,我把这段代码,但这次也NSArray * getAlldata显示为零。 –
您好先生,感谢它正在工作之前,我使用的代码,我发送错误的参数, –
是的。有时它会发生 –