CoreDataDemo

//  User.h
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@interface User : NSManagedObject

@property (nonatomic, retain) NSString * name;
@property (nonatomic, retain) NSNumber * age;
@property (nonatomic, retain) NSData * headImage;

@end

//  User.m
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import "User.h"

@implementation User

@dynamic name;
@dynamic age;
@dynamic headImage;

@end

//  Address.h
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@interface Address : NSManagedObject

@end

//  Address.m
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import "Address.h"

@implementation Address

@end

//
//  DBManager.h
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "User.h"

@interface DBManager : NSObject

//获取单例类型对象
+ (DBManager *)sharedManager;

//增加的操作
- (void)insertUser:(NSDictionary *)userDict;

//查询的方法
- (NSArray *)searchAllUsers;

//修改的方法
- (void)updateUserWithName:(NSString *)name dict:(NSDictionary *)userDict;

//删除的方法
- (void)deleteUser:(User *)user;

@end

//
//  DBManager.m
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import "DBManager.h"
#import <CoreData/CoreData.h>

@implementation DBManager
{
    NSManagedObjectContext *_dbContext;
}

+(DBManager *)sharedManager
{
    static DBManager *manager = nil;

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        manager = [[DBManager alloc] init];

    });

    return manager;
}

-(instancetype)init
{
    self = [super init];
    if (self) {

        //创建coreData的相应对象
        [self createContext];

    }

    return self;
}

- (NSManagedObjectModel *)createModel
{

    NSString *path = [[NSBundle mainBundle] pathForResource:@"MyUser" ofType:@"momd"];

    NSURL *url = [NSURL fileURLWithPath:path];

    NSManagedObjectModel *model = [[NSManagedObjectModel alloc] initWithContentsOfURL:url];

    return model;

}

- (NSPersistentStoreCoordinator *)createCoordinateWithModel:(NSManagedObjectModel *)model
{
    NSPersistentStoreCoordinator *coor = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:model];

    return coor;
}

- (void)addStore:(NSPersistentStoreCoordinator *)coor
{
    //第一个参数:文件的类型(sqlite、xml、binary)
    //第二个参数:nil
    //第三个参数:sqlite文件的路径
    //第四个参数:nil
    //第五个参数:错误信息

    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/user.sqlite"];

    NSLog(@"path:%@",path);

    NSURL *url = [NSURL fileURLWithPath:path];

    NSError *error;

    NSPersistentStore *store = [coor addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:url options:nil error:&error];

    if (error) {
        NSLog(@"error:%@",error.localizedDescription);
    }

}

- (void)createContext
{
    //1.NSManagedObjectModel
    NSManagedObjectModel *model = [self createModel];

    //2.NSPersistentStoreCoordinator
    NSPersistentStoreCoordinator *coor = [self createCoordinateWithModel:model];

    //3.NSPersistentStore
    [self addStore:coor];

    //4.NSManagedObjectContext
    _dbContext = [[NSManagedObjectContext alloc] init];
    _dbContext.persistentStoreCoordinator = coor;

}

-(void)insertUser:(NSDictionary *)userDict
{
    //第一个参数:类名
    User *newUser = [NSEntityDescription insertNewObjectForEntityForName:@"User" inManagedObjectContext:_dbContext];

    //给newUser对象属性赋值
    if ([userDict objectForKey:@"name"]) {
        newUser.name = userDict[@"name"];
    }

    if (userDict[@"age"]) {
        newUser.age = userDict[@"age"];
    }

    if (userDict[@"headImage"]) {
        newUser.headImage = userDict[@"headImage"];
    }

    //保存
    NSError *error;
    [_dbContext save:&error];
    if (error) {
        NSLog(@"%@",error.localizedDescription);
    }

}

//查询的方法
- (NSArray *)searchAllUsers
{

    NSEntityDescription *desc = [NSEntityDescription entityForName:@"User" inManagedObjectContext:_dbContext];

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

    request.entity = desc;

    //执行查询
    NSError *error;
    NSArray *userArray = [_dbContext executeFetchRequest:request error:&error];

    if (error) {
        NSLog(@"%@",error.localizedDescription);
    }

    return userArray;

}

//修改的方法
- (void)updateUserWithName:(NSString *)name dict:(NSDictionary *)userDict
{
    //先查询出来满足条件的
    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    NSEntityDescription *desc = [NSEntityDescription entityForName:@"User" inManagedObjectContext:_dbContext];
    request.entity = desc;

    //查询条件
    //谓词
    NSPredicate *predict = [NSPredicate predicateWithFormat:@"name == %@",name];

    request.predicate = predict;

    NSError *error;
    NSArray *userArray = [_dbContext executeFetchRequest:request error:&error];
    if (error) {
        NSLog(@"%@",error);
    }

    //修改
    for (User *tmpUser in userArray) {

        if (userDict[@"name"]) {
            tmpUser.name = userDict[@"name"];
        }
        if (userDict[@"age"]) {
            tmpUser.age = userDict[@"age"];
        }
        if (userDict[@"headImage"]) {
            tmpUser.headImage = userDict[@"headImage"];
        }

    }

    //保存
    NSError *updateError;
    [_dbContext save:&updateError];

    if (updateError) {
        NSLog(@"updateError:%@",updateError.localizedDescription);
    }

}

//删除
- (void)deleteUser:(User *)user
{
    [_dbContext deleteObject:user];

    //保存
    NSError *error;
    [_dbContext save:&error];

    if (error) {
        NSLog(@"%@",error.localizedDescription);
    }

}

@end

//  DetailViewController.h
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import <UIKit/UIKit.h>
#import "User.h"

@interface DetailViewController : UIViewController

//当前的用户信息
@property (nonatomic,strong)User *user;

@end

//
//  DetailViewController.m
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import "DetailViewController.h"
#import "DBManager.h"

@interface DetailViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>

@end

@implementation DetailViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor whiteColor];

    //保存按钮
    UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(saveAction:)];
    self.navigationItem.rightBarButtonItem = rightItem;

    //显示详细信息
    //姓名
    UILabel *nameLabel = [self createLabelFrame:CGRectMake(30, 100, 60, 40) text:@"姓名:"];
    UITextField *nameTextField = [self createTextField:CGRectMake(110, 100, 200, 40) placeHolder:@"请输入姓名"];
    nameTextField.tag = 100;

    [self.view addSubview:nameLabel];
    [self.view addSubview:nameTextField];

    //年龄
    UILabel *ageLabel = [self createLabelFrame:CGRectMake(30, 160, 60, 40) text:@"年龄:"];
    UITextField *ageTextField = [self createTextField:CGRectMake(110, 160, 200, 40) placeHolder:@"请输入年龄"];
    ageTextField.tag = 200;

    [self.view addSubview:ageLabel];
    [self.view addSubview:ageTextField];

    //头像
    UILabel *imageLabel = [self createLabelFrame:CGRectMake(30, 220, 60, 40) text:@"头像:"];
    UIButton *imageBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    imageBtn.frame = CGRectMake(110, 220, 200, 200);
    [imageBtn addTarget:self action:@selector(chooseImage:) forControlEvents:UIControlEventTouchUpInside];
    imageBtn.tag = 300;

    [self.view addSubview:imageLabel];
    [self.view addSubview:imageBtn];

    //显示
    if (self.user) {
        nameTextField.text = self.user.name;

        ageTextField.text = [NSString stringWithFormat:@"%@",self.user.age];

        [imageBtn setBackgroundImage:[UIImage imageWithData:self.user.headImage] forState:UIControlStateNormal];

    }

}

- (void)chooseImage:(id)sender
{
    //从相册选择图片
    UIImagePickerController *ctrl = [[UIImagePickerController alloc] init];
    ctrl.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    ctrl.delegate = self;

    [self presentViewController:ctrl animated:YES completion:nil];

}

#pragma mark - UIImagePickerController代理
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *image = info[UIImagePickerControllerOriginalImage];

    //取到显示头像的按钮
    UIButton *imageBtn = (UIButton *)[self.view viewWithTag:300];
    [imageBtn setBackgroundImage:image forState:UIControlStateNormal];

    [picker dismissViewControllerAnimated:YES completion:nil];

}

//创建label的方法
- (UILabel *)createLabelFrame:(CGRect)frame text:(NSString *)text
{
    UILabel *label = [[UILabel alloc] initWithFrame:frame];
    label.text = text;

    return label;

}

//创建textField的方法
- (UITextField *)createTextField:(CGRect)frame placeHolder:(NSString *)placeHolder
{
    UITextField *textField = [[UITextField alloc] initWithFrame:frame];
    textField.borderStyle = UITextBorderStyleRoundedRect;
    textField.placeholder = placeHolder;

    return textField;

}

//保存
- (void)saveAction:(id)sender
{
    UITextField *nameTextField = (UITextField *)[self.view viewWithTag:100];

    UITextField *ageTextField = (UITextField *)[self.view viewWithTag:200];

    UIButton *imageBtn = (UIButton *)[self.view viewWithTag:300];

    //添加的功能
    NSMutableDictionary *userDict = [NSMutableDictionary dictionary];
    if (nameTextField.text.length > 0) {
        [userDict setObject:nameTextField.text forKey:@"name"];
    }
    if (ageTextField.text.length > 0) {

        NSNumber *age = [NSNumber numberWithInt:[ageTextField.text intValue]];

        [userDict setObject:age forKey:@"age"];
    }

    UIImage *image = [imageBtn backgroundImageForState:UIControlStateNormal];
    NSData *data = UIImagePNGRepresentation(image);

    if (data.length > 0) {
        [userDict setObject:data forKey:@"headImage"];
    }

    if (self.user) {

        //修改数据
        [[DBManager sharedManager] updateUserWithName:self.user.name dict:userDict];

    }else{

        //添加一条数据
        [[DBManager sharedManager] insertUser:userDict];
    }

    [self.navigationController popViewControllerAnimated:YES];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

//  ViewController.h
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end

//
//  ViewController.m
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import "ViewController.h"
#import "DetailViewController.h"
#import "DBManager.h"

@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
{
    NSMutableArray *_dataArray;

    UITableView *_tbView;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    //初始化数据源
    _dataArray = [NSMutableArray array];

    //创建表格视图
    self.automaticallyAdjustsScrollViewInsets = NO;
    _tbView = [[UITableView alloc] initWithFrame:CGRectMake(0, 64, 375, 667-64) style:UITableViewStylePlain];
    _tbView.delegate = self;
    _tbView.dataSource = self;
    [self.view addSubview:_tbView];

    //添加按钮
    UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(myAddAction:)];
    self.navigationItem.rightBarButtonItem = rightItem;

    self.view.backgroundColor = [UIColor whiteColor];
}

- (void)myAddAction:(id)sender
{
    DetailViewController *dvc = [[DetailViewController alloc] init];

    [self.navigationController pushViewController:dvc animated:YES];

}

- (void)searchUsersFromCoreData
{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        NSArray *userArray = [[DBManager sharedManager] searchAllUsers];

        if (userArray.count > 0) {
            _dataArray = [NSMutableArray arrayWithArray:userArray];
        }

        //刷新表格
        dispatch_async(dispatch_get_main_queue(), ^{
            [_tbView reloadData];
        });

    });
}

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    [self searchUsersFromCoreData];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - UITableView代理
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return _dataArray.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellId = @"cellID";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellId];

    if (nil == cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellId];
    }

    //取到数据模型
    User *user = _dataArray[indexPath.row];

    cell.imageView.image = [UIImage imageWithData:user.headImage];

    cell.textLabel.text = user.name;

    cell.detailTextLabel.text = [NSString stringWithFormat:@"年龄:%@",user.age];

    return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    DetailViewController *dvc = [[DetailViewController alloc] init];

    dvc.user = _dataArray[indexPath.row];

    [self.navigationController pushViewController:dvc animated:YES];
}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {

        //删除
        User *user = _dataArray[indexPath.row];

        [[DBManager sharedManager] deleteUser:user];

        [_dataArray removeObjectAtIndex:indexPath.row];

        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];

    }
}

@end

//  AppDelegate.m
//  CoreDataDemo
//
//  Created by gaokunpeng on 15/2/4.
//  Copyright (c) 2015年 qianfeng. All rights reserved.
//

#import "AppDelegate.h"
#import "ViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    //创建一个导航视图控制器
    ViewController *vCtrl = [[ViewController alloc] init];

    UINavigationController *navCtrl = [[UINavigationController alloc] initWithRootViewController:vCtrl];

    self.window.rootViewController = navCtrl;

    return YES;
}