//

// ViewController.m

// testCoreData

//

// Created by broy denty on 14-1-23.

// Copyright (c) 2014年 denty. All rights reserved.

//

#import "ViewController.h"

#import "ArInfo.h"

#import "AppDelegate.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize context;

- (void)viewDidLoad

{

[super viewDidLoad];

AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication]delegate];//这里需要引进自己项目的委托，是让全局managedObjectContext起作用。

self.context = delegate.managedObjectContext;

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardHide) name:UIKeyboardDidHideNotification object:nil];

// 获取coredata中的context准备数据处理

ArInfo *arInfo = [NSEntityDescription insertNewObjectForEntityForName:@"ArInfo"inManagedObjectContext:context];

// 获取coredata中一张表的实例

// 写入数据

arInfo.myid=@"123";

arInfo.myname=@"object-c";

NSError *error = nil;

if (![context save:&error]) {

NSLog(@"%@",[error localizedDescription]);

}

// 获取数据

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc]init];

// 创建数据容器

NSEntityDescription *entity = [NSEntityDescription entityForName:@"ArInfo"inManagedObjectContext:context];

[fetchRequest setEntity:entity];

// 获取coredata中的entry放入数据容器中

NSArray *fetchObject = [context executeFetchRequest:fetchRequest error:&error];

// 获取数据对象读取数据

for (NSManagedObject *info in fetchObject) {

NSLog(@"id:%@",[info valueForKey:@"myid"]);

NSLog(@"name:%@",[info valueForKey:@"myname"]);

}

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

- (void)keyboardHide

{

}

@end