使用FMDatabase操作sqlite3数据库非常简单和方便
1 //
2 // main.m
3 // iOSDemo0602_sqlite3
4 //
5 // Created by yao_yu on 14-6-2.
6 // Copyright (c) 2014年 yao_yu. All rights reserved.
7 //
8
9 #import <UIKit/UIKit.h>
10 #import "FMDatabase.h"
11
12 void test01();
13 BOOL isfile(NSString *path);
14 BOOL isdir(NSString *path);
15
16 int main(int argc, char * argv[])
17 {
18 @autoreleasepool {
19 test01();
20 }
21 return 0;
22 }
23
24 void test01()
25 {
26 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
27 NSString *docpath = [paths objectAtIndex:0];
28 NSString *dbpath = [docpath stringByAppendingPathComponent:@"YY/Data2"];
29 // NSLog(@"%@", dbpath);
30 if (!isdir(dbpath)) {
31 NSFileManager *fileManager = [NSFileManager defaultManager];
32 [fileManager createDirectoryAtPath:dbpath withIntermediateDirectories:YES attributes:nil error:nil];
33 }
34
35 NSString *dbfile = [dbpath stringByAppendingPathComponent:@"data.db"];
36 NSLog(@"%@", dbfile);
37
38 //初始化
39 FMDatabase *db = [FMDatabase databaseWithPath:dbfile];
40 //打开数据库
41 [db open];
42
43 //删除表
44 [db executeUpdate:@"drop table persons"];
45
46 //添加表
47 [db executeUpdate:@"create table persons(id, name)"];
48
49 //删除原有数据
50 [db executeUpdate:@"delete from persons"];
51
52 //使用事务添加数据
53 [db beginTransaction];
54 for(int i=0; i< 10000; i++)
55 {
56 [db executeUpdate:@"insert into persons values(?,?)", [NSString stringWithFormat:@"%d", i], [NSString stringWithFormat:@"第%d", i]];
57 }
58 [db commit];
59
60 //数据查询
61 FMResultSet *cursor = [db executeQuery:@"select * from persons"];
62 int nCols = cursor.columnCount;
63 while ([cursor next]) {
64 for (int i=0; i<nCols; i++) {
65 printf("%s ", [[cursor stringForColumnIndex:i] UTF8String]);
66 }
67 printf("\n");
68 }
69 cursor = nil;
70
71 //关闭数据库
72 [db close];
73
74 //删除数据库测试文件
75 [[NSFileManager defaultManager] removeItemAtPath:dbfile error:nil];
76
77 }
78
79 BOOL isfile(NSString *path)
80 {
81 NSFileManager *fileManager = [NSFileManager defaultManager];
82 BOOL isdir = NO;
83 if ([fileManager fileExistsAtPath:path isDirectory: &isdir]) {
84 return isdir == NO;
85 }
86 return NO;
87 }
88
89 BOOL isdir(NSString *path)
90 {
91 NSFileManager *fileManager = [NSFileManager defaultManager];
92 BOOL isdir = NO;
93 if ([fileManager fileExistsAtPath:path isDirectory: &isdir]) {
94 return isdir == YES;
95 }
96 return NO;
97 }
时间： 2024-10-13 11:33:15