IOS-FMDB

 1 //
 2 //  ViewController.m
 3 //  IOS_0331_SQLite3
 4 //
 5 //  Created by ma c on 16/3/31.
 6 //  Copyright © 2016年 博文科技. All rights reserved.
 7 //
 8 
 9 #import "ViewController.h"
10 #import "FMDB.h"
11 
12 @interface ViewController ()
13 
14 @property (nonatomic, strong) FMDatabase *db;
15 
16 
17 - (IBAction)insert;
18 - (IBAction)update;
19 - (IBAction)query;
20 - (IBAction)delete;
21 
22 @end
23 
24 @implementation ViewController
25 
26 - (void)viewDidLoad {
27     [super viewDidLoad];
28     
29     [self createDatabase];
30 }
31 
32 - (void)createDatabase
33 {
34     // 0.获得沙盒中的数据库文件名
35     NSString *fileName = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"student.sqlite"];
36     NSLog(@"%@",fileName);
37     
38     // 1.创建数据库实例对象
39     self.db = [FMDatabase databaseWithPath:fileName];
40     
41     // 2.打开数据库
42     if ([self.db open]) {
43         NSLog(@"数据库打开成功");
44         
45         //创表
46         BOOL flag = [self.db executeUpdate:@"create table if not exists t_student (id integer primary key autoincrement, name text, age integer) ;"];
47         if (flag) {
48             NSLog(@"建表成功");
49         } else {
50             NSLog(@"建表失败");
51         }
52     } else {
53         NSLog(@"数据库打开失败");
54     }
55 }
56 
57 - (IBAction)insert {
58     
59     [self.db executeUpdate:@"insert into t_student (name, age) values (?, ?);",@"rose",@10];
60 
61 }
62 
63 - (IBAction)update {
64     
65     [self.db executeUpdate:@"update t_student set age = ? where name = ?;",@20, @"rose"];
66 }
67 
68 - (IBAction)query {
69     //1.查询数据
70     FMResultSet *rs = [self.db executeQuery:@"select * from t_student;"];
71     //2.遍历结果集
72     while (rs.next) {
73         int ID = [rs intForColumn:@"id"];
74         NSString *name = [rs stringForColumn:@"name"];
75         int age = [rs intForColumn:@"age"];
76         
77         NSLog(@"%d %@ %d",ID, name, age);
78     }
79     
80 }
81 
82 - (IBAction)delete {
83     
84     [self.db executeUpdate:@"delete from t_student where name = ?;",@"rose"];
85 
86 }
87 @end

  1 //
  2 //  IWViewController.m
  3 //  01-SQLite的基本使用
  4 //
  5 //  Created by apple on 14-5-22.
  6 //  Copyright (c) 2014年 itcast. All rights reserved.
  7 //
  8 
  9 #import "IWViewController.h"
 10 #import "FMDB.h"
 11 
 12 @interface IWViewController ()
 13 @property (nonatomic, strong) FMDatabaseQueue *queue;
 14 - (IBAction)insert;
 15 - (IBAction)update;
 16 - (IBAction)delete;
 17 - (IBAction)query;
 18 @end
 19 
 20 @implementation IWViewController
 21 
 22 - (void)viewDidLoad
 23 {
 24     [super viewDidLoad];
 25     
 26     // 0.获得沙盒中的数据库文件名
 27     NSString *filename = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"student.sqlite"];
 28     
 29     // 1.创建数据库队列
 30     self.queue = [FMDatabaseQueue databaseQueueWithPath:filename];
 31     
 32     // 2.创表
 33     [self.queue inDatabase:^(FMDatabase *db) {
 34         BOOL result = [db executeUpdate:@"create table if not exists t_student (id integer primary key autoincrement, name text, age integer);"];
 35         
 36         if (result) {
 37             NSLog(@"创表成功");
 38         } else {
 39             NSLog(@"创表失败");
 40         }
 41     }];
 42 }
 43 
 44 - (IBAction)insert
 45 {
 46     [self.queue inDatabase:^(FMDatabase *db) {
 47         for (int i = 0; i<40; i++) {
 48             NSString *name = [NSString stringWithFormat:@"rose-%d", arc4random() % 1000];
 49             NSNumber *age = @(arc4random() % 100 + 1);
 50             [db executeUpdate:@"insert into t_student (name, age) values (?, ?);", name, age];
 51         }
 52     }];
 53 }
 54 
 55 - (IBAction)update
 56 {
 57     [self.queue inDatabase:^(FMDatabase *db) {
 58         // 开启事务
 59 //        [db executeUpdate:@"begin transaction;"];
 60 //        [db beginTransaction];
 61         
 62         [db executeUpdate:@"update t_student set age = ? where name = ?;", @20, @"jack"];
 63         [db executeUpdate:@"update t_student set age = ? where name = ?;", @20, @"jack"];
 64         
 65         
 66 //        if (发现情况不对){
 67 //            // 回滚事务
 68 //            [db rollback];
 69 ////            [db executeUpdate:@"rollback transaction;"];
 70 //        }
 71         
 72         
 73         [db executeUpdate:@"update t_student set age = ? where name = ?;", @20, @"jack"];
 74         
 75         // 提交事务
 76 //        [db commit];
 77 //        [db executeUpdate:@"commit transaction;"];
 78     }];
 79 }
 80 
 81 - (IBAction)delete
 82 {
 83     [self.queue inTransaction:^(FMDatabase *db, BOOL *rollback) {
 84         [db executeUpdate:@"update t_student set age = ? where name = ?;", @20, @"jack"];
 85         [db executeUpdate:@"update t_student set age = ? where name = ?;", @20, @"jack"];
 86         
 87 //        if (发现情况不对){
 88 //            // 回滚事务
 89 //            *rollback = YES;
 90 //        }
 91     }];
 92 }
 93 
 94 - (IBAction)query
 95 {
 96     [self.queue inDatabase:^(FMDatabase *db) {
 97         // 1.查询数据
 98         FMResultSet *rs = [db executeQuery:@"select * from t_student where age > ?;", @50];
 99         
100         // 2.遍历结果集
101         while (rs.next) {
102             int ID = [rs intForColumn:@"id"];
103             NSString *name = [rs stringForColumn:@"name"];
104             int age = [rs intForColumn:@"age"];
105             
106             NSLog(@"%d %@ %d", ID, name, age);
107         }
108     }];
109 }
110 @end