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IOS使用FMDB封装的数据库增删改查操作

时间:2015-10-29 21:36:03      阅读:393      评论:0      收藏:0      [点我收藏+]

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//

//  DBHelper.h

//  LessonStoryBoard

//

//  Created by 袁冬冬 on 15/10/29.

//  Copyright (c) 2015 袁冬冬. All rights reserved.

//

 

#import <Foundation/Foundation.h>

#import "FMDB.h"

@interface DBHelper : NSObject

 

@property (nonatomicstrongFMDatabaseQueue *databaseQueue; //数据库

- (void)openDB:(NSString *)dbName; //打开数据库,并创建数据库对象

- (void)executeupdate:(NSString *)sql; //执行更新SQL语句,用于插入、修改、删除

- (NSArray *)executeQuery:(NSString *)sql; //执行查询语句

@end

 

//

//  DBHelper.m

//  LessonStoryBoard

//

//  Created by 袁冬冬 on 15/10/29.

//  Copyright (c) 2015 袁冬冬. All rights reserved.

//

 

#import "DBHelper.h"

 

@implementation DBHelper

 

- (void)openDB:(NSString *)dbName {

    //获取数据库路径,通常保存到沙盒中

    NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectoryNSUserDomainMaskYESfirstObjectstringByAppendingPathComponent:dbName];

    NSLog(@"%@",filePath);

    //创建FMDatabaseQueue对象

    self.databaseQueue = [FMDatabaseQueue databaseQueueWithPath:filePath];

}

 

- (void)executeupdate:(NSString *)sql {

    //执行更新SQL语句

    [self.databaseQueue inDatabase:^(FMDatabase *db) {

        [db executeUpdate:sql];

    }];

}

 

- (NSArray *)executeQuery:(NSString *)sql {

    NSMutableArray *array = [NSMutableArray array];

    [self.databaseQueue inDatabase:^(FMDatabase *db) {

        //执行查询语句

        FMResultSet *result = [db executeQuery:sql];

        while (result.next) {

            NSMutableDictionary *dic = [NSMutableDictionary dictionary];

            for (int i = 0; i < result.columnCount; i++) {

                dic[[result columnNameForIndex:i]] = [result stringForColumnIndex:i];

            }

            [array addObject:dic];

        }

    }];

    return array;

}

 

@end

 

//注册

//

//  RegisterViewController.m

//  LessonStoryBoard

//

//  Created by 袁冬冬 on 15/10/29.

//  Copyright (c) 2015 袁冬冬. All rights reserved.

//

 

#import "RegisterViewController.h"

#import "DBHelper.h" //数据库操作类

 

@interface RegisterViewController ()

@property (weak, nonatomic) IBOutlet UITextField *usernameTF; //用户名

@property (weak, nonatomic) IBOutlet UITextField *passwordTF; //密码

@property (weak, nonatomic) IBOutlet UITextField *rePasswordTF; //确认密码

@property (weak, nonatomic) IBOutlet UITextField *emailTF; //邮箱

@property (weak, nonatomic) IBOutlet UITextField *phoneTF; //手机号

@end

 

@implementation RegisterViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

    

}

 

- (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.

}

*/

 

- (IBAction)reBackClick:(UIButton *)sender {

    [self saveDataToDataBase]; //将数据存储到数据库

    [self.navigationController popViewControllerAnimated:YES];

}

 

#pragma mark - save data in database

- (void)saveDataToDataBase {

    DBHelper *dbHelper = [[DBHelper alloc] init];

    [dbHelper openDB:@"contact.sqlite"]; //打开数据库,创建数据库对象

    //创建表

    [dbHelper executeupdate:@"create table if not exists t_user(username text primary key,password text,email text,phone text)"];

    //插入信息

    [dbHelper executeupdate:[NSString stringWithFormat: @"insert into t_user(username,password,email,phone) values(%@,%@,%@,%@)",self.usernameTF.text,self.passwordTF.text,self.emailTF.text,self.phoneTF.text]];

}

@end

 

//登陆

//

//  LoginViewController.m

//  LessonStoryBoard

//

//  Created by 袁冬冬 on 15/10/29.

//  Copyright (c) 2015 袁冬冬. All rights reserved.

//

 

#import "LoginViewController.h"

#import "ListTableViewController.h"

#import "DBHelper.h"

 

 

@interface LoginViewController ()

@property (weak, nonatomic) IBOutlet UITextField *userNameTF; //用户名文本框

@property (weak, nonatomic) IBOutlet UITextField *passwordTF; //密码文本框

//默认的账号密码

@property (nonatomic, copy) NSString *name;

@property (nonatomic, copy) NSString *password;

@end

 

@implementation LoginViewController

 

- (void)viewDidLoad {

    [super viewDidLoad];

    self.name = @"admin";

    self.password = @"123456";

}

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

#pragma  mark - Action

//登录按钮响应事件

- (IBAction)LoginClick:(UIButton *)sender {

    //获取数据库中的用户名和密码

    NSDictionary *dic = [self gainDataFromDataBase];

    NSString *myname = dic[@"username"];

    NSString *mypw = dic[@"password"];

    //创建UIAlertController

    if ([self.userNameTF.text isEqualToString:myname] && [self.passwordTF.text isEqualToString:mypw]) {

            //获取下一个视图控制器

            ListTableViewController *listVC = [self.storyboard instantiateViewControllerWithIdentifier:@"list"];

        [self alertController:@"欢迎回来" viewController:listVC];

    } else {

        [self alertController:@"账号或密码错误" viewController:nil];

    }

}

 

/*

#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.

}

*/

//alertController提示框

- (void)alertController:(NSString *)message viewController:(UITableViewController *)controller {

    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"温馨提示" message:message preferredStyle:(UIAlertControllerStyleAlert)];

    UIAlertAction *action = [UIAlertAction actionWithTitle:@"" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

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

    }];

    [alertVC addAction:action];

    [self presentViewController:alertVC animated:YES completion:nil];

    }

#pragma mark - data from dataBase

- (NSDictionary *)gainDataFromDataBase {

    DBHelper *dbHelper = [[DBHelper alloc] init];

    [dbHelper openDB:@"contact.sqlite"]; //打开数据库,创建数据库对象

    NSArray *array = [dbHelper executeQuery:[NSString stringWithFormat:@"select * from t_user where username = %@ and password = %@",self.userNameTF.text,self.passwordTF.text]];

    return array[0];

}

@end

IOS使用FMDB封装的数据库增删改查操作

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原文地址:http://www.cnblogs.com/dongdongyuan/p/4921662.html

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