小编use*_*170的帖子

你的ViewController中的Hello:

[super viewDidLoad];

context = [[AppDelegate sharedAppDelegate] managedObjectContext];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setEntity:[NSEntityDescription entityForName:@"Items" inManagedObjectContext:context]];
NSArray *results = [context executeFetchRequest:request error:&error];
if(error){
    NSLog(@"++++++++");
    return;
}

NSLog(@"ARRRAY====%@",[results valueForKey:@"items"]  );

数据是:

("null>", MyGoodData)

如果我在AppDelegate中调用此代码,那么确定:

数据是:

(MyGoodData)