// // 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; }
转载于:https://www.cnblogs.com/0515offer/p/4665569.html
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