#import "ViewController.h"#import 
    
     #import "Employee.h"@interface ViewController (){    NSManagedObjectContext *_context;}@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];           [self setupContext];    }-(void)setupContext{    _context = [[NSManagedObjectContext alloc] init];        // 模型文件    NSManagedObjectModel *model = [NSManagedObjectModel mergedModelFromBundles:nil];        // 持久化存储调度器    NSPersistentStoreCoordinator *store = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:model];            NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];    NSLog(@"%@",doc);    NSString *sqlitePath = [doc stringByAppendingPathComponent:@"company.sqlite"];        //数据存储的类型 数据库存储路径    [store addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[NSURL fileURLWithPath:sqlitePath] options:nil error:nil];            _context.persistentStoreCoordinator = store;}-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{        NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"Employee"];        NSPredicate *pre = [NSPredicate predicateWithFormat:@"name like 'z*n'"];    request.predicate = pre;    NSArray *emps =  [_context executeFetchRequest:request error:nil];    NSLog(@"%@",emps);}-(void)createEmployee{    Employee *employee = [NSEntityDescription insertNewObjectForEntityForName:@"Employee" inManagedObjectContext:_context];        employee.name = @"zhangsan";    employee.age = @18;    employee.height = @1.89;        [_context save:nil];}