#import "ViewController.h"
#import <CoreData/CoreData.h>
#import "Person.h"
@interface ViewController ()
@end
@implementation ViewController
{
NSManagedObjectContext *_context;
}
- (void)viewDidLoad {
[super viewDidLoad];
//获取上下文
_context = [[NSManagedObjectContext alloc]init];
//添加model
NSManagedObjectModel *model = [NSManagedObjectModel mergedModelFromBundles:nil];
NSPersistentStoreCoordinator *store = [[NSPersistentStoreCoordinator alloc]initWithManagedObjectModel:model];
NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
NSString *sqlitePath = [doc stringByAppendingString:@"/person.sqlite"];
// NSString *sqlitePath = [doc stringByAppendingPathExtension:@"person.sqlite"];
NSLog(@"%@",sqlitePath);
NSError *error = nil;
[store addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[NSURL fileURLWithPath:sqlitePath] options:nil error:&error];
_context.persistentStoreCoordinator = store;
[self addPerson];
[self findPerson];
}
- (void)addPerson{
//创建对象
Person *person = [NSEntityDescription insertNewObjectForEntityForName:@"Person" inManagedObjectContext:_context];
person.name = @"hzt";
person.age = @"15";
person.phone = @"1314";
//保存数据
NSError *error = nil;
if ([_context save:&error]){
NSLog(@"保存成功");
}else{
NSLog(@"保存失败");
}
}
- (void)findPerson{
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"Person"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name = %@",@"hzt"];
request.predicate = predicate;
NSError *error = nil;
NSArray *array = [_context executeFetchRequest:request error:&error];
for (Person *per in array){
NSLog(@"%@,%@",per.name,per.age);
}
}
------------------参考文献-------------------------------
http://www.jianshu.com/p/8299b7360dd6
