DataBase.h

import <Foundation/Foundation.h>

import "Entity+CoreDataClass.h"

import "AppDelegate.h"

@interface DataBase : NSObject

+(instancetype)showdata;

-(void)addname:(NSDictionary *)dic;

-(void)changedata;

-(void)deletdata:(Entity *)theData;

-(NSMutableArray*)showAllArray;
DataBase.m

import "DataBase.h"

static DataBase *thedatabase;
@implementation DataBase

+(instancetype)showdata{

if (!thedatabase) {
    thedatabase = [[DataBase alloc]init];
}
return thedatabase;

}

-(void)addname:(NSDictionary *)dic{

AppDelegate *app =(AppDelegate *)[UIApplication sharedApplication].delegate;

Entity *person = [NSEntityDescription insertNewObjectForEntityForName:@"Entity" inManagedObjectContext:app.persistentContainer.viewContext];
person.personName = dic[@"personName"];
person.personAge = dic[@"personAge"];

[app saveContext];

}

-(void)changedata{

AppDelegate *app =(AppDelegate *)[UIApplication sharedApplication].delegate;

[app saveContext];

}

-(void)deletdata:(Entity *)theData{

AppDelegate *app =(AppDelegate *)[UIApplication sharedApplication].delegate;

[app.persistentContainer.viewContext deleteObject:theData];

[app saveContext];

}

-(NSMutableArray*)showAllArray{

AppDelegate *app =(AppDelegate *)[UIApplication sharedApplication].delegate;

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

NSEntityDescription *entity = [NSEntityDescription entityForName:@"Entity" inManagedObjectContext:app.persistentContainer.viewContext];

[request setEntity:entity];

NSArray *arr = [app.persistentContainer.viewContext executeFetchRequest:request error:nil];

return [arr mutableCopy];

}

@end
视图.h

import <UIKit/UIKit.h>

@interface AddView : UIView

@property(nonatomic,strong)UITextField *theBookTF;
@property(nonatomic,strong)UITextField *thePriceTF;

@end

视图.m

import "AddView.h"

@implementation AddView

-(instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {

    [self addSubview:self.theBookTF];
    [self addSubview:self.thePriceTF];
}
return self;

}

pragma mark - 属性实例化

-(UITextField *)theBookTF
{
if (!_theBookTF) {
_theBookTF = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 200, 40)];
_theBookTF.center = CGPointMake(self.center.x, self.center.y - 50);
_theBookTF.layer.borderWidth = 1.0;
_theBookTF.borderStyle = UITextBorderStyleRoundedRect;
_theBookTF.placeholder = @"姓名";
}
return _theBookTF;
}

-(UITextField *)thePriceTF
{
if (!_thePriceTF) {
_thePriceTF = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 200, 40)];
_thePriceTF.center = CGPointMake(self.center.x, self.center.y + 10);
_thePriceTF.borderStyle = UITextBorderStyleRoundedRect;
_thePriceTF.layer.borderWidth = 1.0;
_thePriceTF.placeholder = @"年龄";
}
return _thePriceTF;
}

@end
主控制器.h

import <UIKit/UIKit.h>

@interface ViewController : UITableViewController

@end
主控制器.m

import "ViewController.h"

import "DataBase.h"

import "Entity+CoreDataClass.h"

import "AddViewController.h"

@interface ViewController ()
//接收数组
@property(nonatomic,strong)NSArray *theDataArr;

@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];

  self.title = @"图书管理信息平台";
  //导航条按钮
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"添加" style:UIBarButtonItemStylePlain target:self action:@selector(addName)];
  }

-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
//
self.theDataArr = [[DataBase showdata
]showAllArray];
//刷新表格
[self.tableView reloadData];
}

-(void)addName
{
// 进入Add视图
AddViewController *addVC = [[AddViewController alloc] init];

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

}

• (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

  return self.theDataArr.count;
  }

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

Entity *enti = self.theDataArr [indexPath.row];

[[DataBase showdata]deletdata:enti];

self.theDataArr = [[DataBase showdata]showAllArray];

[self.tableView reloadData];

}

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
  static NSString *identifier = @"cell";

  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
  if (cell == nil) {
  cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
  }
  Entity *theEntity = self.theDataArr[indexPath.row];

  cell.textLabel.text = theEntity.personName;
  cell.detailTextLabel.text = theEntity.personAge;

  return cell;
  }

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

AddViewController *theVc = [[AddViewController alloc]init];

theVc.theEntity = self.theDataArr[indexPath.row];

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

}

@end
添加控制器.h

import <UIKit/UIKit.h>

import "Entity+CoreDataClass.h"

@interface AddViewController : UIViewController

@property(nonatomic,strong)Entity *theEntity;

@end
添加控制器.m

import "AddViewController.h"

import "AddView.h"

import "Entity+CoreDataClass.h"

import "DataBase.h"

@interface AddViewController ()
{
AddView *theAddView;

}

@end

@implementation AddViewController

• (void)viewDidLoad {
  [super viewDidLoad];

  self.title = @"添加数据平台";

theAddView = [[AddView alloc] initWithFrame:self.view.frame];
theAddView.backgroundColor = [UIColor whiteColor];
self.view = theAddView;

theAddView.theBookTF.text =  self.theEntity.personName;

theAddView.thePriceTF.text = self.theEntity.personAge;

if (theAddView.theBookTF.text == nil ||theAddView.theBookTF.text.length <= 0)

    //添加按钮文字
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:self action:@selector(save)];

else
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(update)];

}
//添加
-(void)save
{

NSDictionary *dict = @{@"personName":theAddView.theBookTF.text,@"personAge":theAddView.thePriceTF.text};

// CoreDataModel *data = [[CoreDataModel alloc]init];
// data.dataage = theAddView.theBookTF.text;
// data.dataname = theAddView.thePriceTF.text;

[[DataBase showdata] addname:dict];

[self.navigationController popViewControllerAnimated:YES];

}
//修改
-(void)update{

self.theEntity.personName=theAddView.theBookTF.text;

self.theEntity.personAge = theAddView.thePriceTF.text;

[[DataBase showdata]changedata];

[self.navigationController popViewControllerAnimated:YES];

}

@end