NSMutableArray iPhone的核心数据实体属性值
我正在使用此代码获取核心数据结果:NSMutableArray iPhone的核心数据实体属性值,iphone,objective-c,ios,core-data,Iphone,Objective C,Ios,Core Data,我正在使用此代码获取核心数据结果: -(void)getData { NSEntityDescription *entity = [NSEntityDescription entityForName:@"Favouritesdata" inManagedObjectContext:context]; NSFetchRequest *request = [[NSFetchRequest alloc] init]; [request setFetchBatchSize:20]; [reque
-(void)getData {
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Favouritesdata" inManagedObjectContext:context];
NSFetchRequest *request = [[NSFetchRequest alloc] init];
[request setFetchBatchSize:20];
[request setEntity:entity];
NSSortDescriptor *sort = [[NSSortDescriptor alloc] initWithKey:@"licenseplate" ascending:NO];
NSArray *newArray = [[NSArray alloc]initWithObjects:sort, nil];
[request setSortDescriptors:newArray];
NSError *error;
results = [[context executeFetchRequest:request error:&error] mutableCopy];
NSLog(@"results::::: %@", results);
[self setLicensePlateArray:results];
[self.favouritesTable reloadData];
}
在这个实体FavoriteSdata中,我有一个名为license plate的属性,我想将这个属性值传递给NSMutableArray
如何获取这些值?您可以使用NSPredicate并通过在请求中传递谓词直接获取值。有关初学者难以理解的更多信息,请参阅此链接。。。任何教程或示例代码请参考此链接并转到保存和加载部分,您将找到somr coredata教程。对于NSFetchController教程将有所帮助。NSEntityDescription*EntityDescription=[NSEntityDescription entityForName:@“Contacts”在ManagedObjectContext:context中];NSFetchRequest*request=[[NSFetchRequest alloc]init];[请求集合实体:entityDesc];NSPredicate*pred=[NSPredicate谓词格式:@“(name=%@)”,name.text];[请求集谓词:pred];