iOScoreData

static int row=0;
static const NSString *kStoryboardName = @"LRCoreDataViewController";
static const NSString *kIdentifier = @"LRCoreDataViewController";

@interface LRCoreDataViewControllerCellInfo : NSObject
@property (nonatomic,strong) NSString *name;
@property (nonatomic,strong) NSString *city;
@property (nonatomic,strong) NSString *state;
@end
@implementation LRCoreDataViewControllerCellInfo
@end
typedef LRCoreDataViewControllerCellInfo CellInfo_t;

@interface LRCoreDataViewController ()
{
    NSManagedObjectContext *_context;
}
@property (strong, nonatomic) IBOutlet UITableView *myTableView;
@property (nonatomic,strong) NSMutableArray *cellInfoArray;
@end

@implementation LRCoreDataViewController
@synthesize failedBankInfos;
@synthesize managedObjectContext;
+(instancetype)createViewController:(id)createArgs{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:(NSString *)kStoryboardName bundle:nil];
    LRCoreDataViewController *vc = [storyboard instantiateViewControllerWithIdentifier:(NSString *)kIdentifier];
    return vc;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor=[UIColor cyanColor];
    [self initCoreData];
    [self initRightItem];
    [self initTableView];
    [self setExtraCellLineHidden:self.myTableView];
    //[self openDataBase];
    self.myDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
}
- (void)openDataBase{
    NSManagedObjectModel *model=[NSManagedObjectModel mergedModelFromBundles:nil];
    NSPersistentStoreCoordinator *coodinator=[[NSPersistentStoreCoordinator alloc]initWithManagedObjectModel:model];
    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/mydatabase.db"];
    NSError *error=nil;
    [coodinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:[NSURL fileURLWithPath:path] options:nil error:&error];
    if (error) {
        NSLog(@"打开数据库失败");
    }else{
        NSLog(@"创建数据库成功");
        _cOntext=[[NSManagedObjectContext alloc]init];
        _context.persistentStoreCoordinator=coodinator;
    }
}
- (void)setExtraCellLineHidden: (UITableView *)tableView{
    UIView *view =[ [UIView alloc]init];
    view.backgroundColor = [UIColor clearColor];
    [tableView setTableFooterView:view];
    [tableView setTableHeaderView:view];
}
- (void)initTableView{
    self.myTableView.delegate=self;
    self.myTableView.dataSource=self;
}
- (void)initRightItem{
    UIButton *rightBtn = [[UIButton alloc]init];
    [rightBtn setFrame:CGRectMake(0, 0, 39, 36)];
    [rightBtn setImage:[UIImage imageNamed:@"addData"] forState:UIControlStateNormal];
    rightBtn.showsTouchWhenHighlighted = YES;
    [rightBtn addTarget:self action:@selector(addData) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *buttOnItem= [[UIBarButtonItem alloc] initWithCustomView:rightBtn];
    self.navigationItem.rightBarButtOnItem= buttonItem;
}
#pragma mark - 向数据库中添加数据，并显示在当前界面
- (void)addData{
    LRAlertViewManager *manager=[LRAlertViewManager sharedAlertViewManager];
    manager.delegate=self;
    [manager showAlertView];
}
- (void)clickButton:(int)tag{
    if (tag==99) {
        NSError *error;
        //创建一个指向数据库的指针。管理对象，上下文。持久性存储模型对象
        NSManagedObjectContext *cOntext=[self managedObjectContext];
        NSManagedObject *BankInfo=[NSEntityDescription insertNewObjectForEntityForName:@"BankInfo" inManagedObjectContext:context];
        [BankInfo    setValue:@"姓名" forKey:@"name"];
        [BankInfo    setValue:@"城市" forKey:@"city"];
        [BankInfo    setValue:@"状态" forKey:@"sta"];
        [BankInfo    setValue:[NSNumber numberWithInt:row] forKey:@"row"];
        NSManagedObject    *bankDetails=[NSEntityDescription insertNewObjectForEntityForName:@"BankDetails" inManagedObjectContext:context];
        [bankDetails setValue:[NSDate date] forKey:@"hh"];
        [bankDetails setValue:[NSDate date] forKey:@"mm"];
        [bankDetails setValue:[NSNumber numberWithInt:12345] forKey:@"zip"];
        [bankDetails setValue:BankInfo forKey:@"info"];
        [bankDetails    setValue:bankDetails forKey:@"details"];
        if (![context save:&error]) {
            NSLog(@"Whoops, could not save:%@",[error localizedDescription]);
        }
        NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
        NSEntityDescription *entity = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:context];
        [fetchRequest setEntity:entity];
        NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
        for (FailedBankInfo *info in fetchedObjects) {
            NSLog(@"row: %d", info.row);
            FailedBankDetails *details = info.details;
            NSLog(@"Zip: %@", details.zip);
        }
        NSFetchRequest *fetchRequest2 = [[NSFetchRequest alloc] init];
        NSEntityDescription *entity2 = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:managedObjectContext];
        [fetchRequest2 setEntity:entity2];
        NSError *error2;
        self.failedBankInfos = [managedObjectContext executeFetchRequest:fetchRequest2 error:&error2];
        [self.myTableView reloadData];
        row++;
    }else if (tag==100){
        NSManagedObjectContext *cOntext= [self managedObjectContext];
        NSEntityDescription *description = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:context];
        NSFetchRequest *request = [[NSFetchRequest alloc] init];
        [request setIncludesPropertyValues:NO];
        [request setEntity:description];
        NSError *error = nil;
        NSArray *datas = [context executeFetchRequest:request error:&error];
        if (!error && datas && [datas count]){
            for (NSManagedObject *obj in datas){
                [context deleteObject:obj];
            }
            if (![context save:&error]){
                NSLog(@"error:%@",error);
            }
        }
        NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
        NSEntityDescription *entity = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:managedObjectContext];
        [fetchRequest setEntity:entity];
        NSError *error2;
        self.failedBankInfos = [managedObjectContext executeFetchRequest:fetchRequest error:&error2];
        [self.myTableView reloadData];
    }
}
#pragma mark -初始化 NSArray存数据
- (void)initCoreData{
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:managedObjectContext];
    [fetchRequest setEntity:entity];
    NSError *error;
    self.failedBankInfos = [managedObjectContext executeFetchRequest:fetchRequest error:&error];
    self.title = @"CoreData";
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return failedBankInfos.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }
    FailedBankInfo *info = [failedBankInfos objectAtIndex:indexPath.row];
    cell.textLabel.text = info.name;
    cell.detailTextLabel.text = [NSString stringWithFormat:@"%@, %@",info.city, info.state];
    UILabel *deleteLabel=[[UILabel alloc]initWithFrame:CGRectMake([UIScreen mainScreen].bounds.size.width-200, 5, 200, 40)];
    deleteLabel.text=@"向左滑动删除CoreData数据";
    [cell.contentView addSubview:deleteLabel];
    return cell;
}
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
    return UITableViewCellEditingStyleDelete;
}
-(NSString *)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath{
    return @"删除";
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
    NSManagedObjectContext *cOntext= [self managedObjectContext];
    NSEntityDescription *description = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:context];
    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    [request setIncludesPropertyValues:NO];
    [request setEntity:description];
    NSError *error = nil;
    NSArray *datas = [context executeFetchRequest:request error:&error];
    if (!error && datas && [datas count]){
        [context deleteObject:datas[indexPath.row]];
        if (![context save:&error]){
            NSLog(@"error:%@",error);
        }
    }
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"FailedBankInfo" inManagedObjectContext:managedObjectContext];
    [fetchRequest setEntity:entity];
    NSError *error2;
    self.failedBankInfos = [managedObjectContext executeFetchRequest:fetchRequest error:&error2];
    [self.myTableView deleteRowsAtIndexPaths:[NSMutableArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    [self.myTableView reloadData];
}