ios 封装sqllite3接口

2013-03-25 17:41 261人阅读 评论(0) 收藏 举报

1. //
2. #import <Foundation/Foundation.h>
3. #import "sqlite3.h"
4. @interface Sqllib : NSObject
5. {
6. sqlite3 *m_sql;
7. NSString *m_dbName;
8. }
9. @property(nonatomic)sqlite3*  m_sql;
10. @property(nonatomic,retain)NSString*  m_dbName;
11. -(id)initWithDbName:(NSString*)dbname;
12. -(BOOL)openOrCreateDatabase:(NSString*)DbName;
13. -(BOOL)createTable:(NSString*)sqlCreateTable;
14. -(void)closeDatabase;
15. -(BOOL)InsertTable:(NSString*)sqlInsert;
16. -(BOOL)UpdataTable:(NSString*)sqlUpdata;
17. -(NSArray*)querryTable:(NSString*)sqlQuerry;
18. -(NSArray*)querryTableByCallBack:(NSString*)sqlQuerry;
19. @end
20. //
21. #import "sqllib.h"
22. @implementation Sqllib
23. @synthesize m_sql;
24. @synthesize m_dbName;
25. -(id) initWithDbName:(NSString*)dbname
26. {
27. self = [super init];
28. if (self != nil) {
29. if ([self openOrCreateDatabase:dbname]) {
30. [self closeDatabase];
31. }
32. }
33. return self;
34. }
35. -(id) init
36. {
37. NSAssert(0,@"Never Use this.Please Call Use initWithDbName:(NSString*)");
38. return nil;
39. }
40. -(void) dealloc
41. {
42. self.m_sql = nil;
43. self.m_dbName =nil;
44. [super dealloc];
45. }
46. //创建数据库
47. -(BOOL)openOrCreateDatabase:(NSString*)dbName
48. {
49. self.m_dbName = dbName;
50. NSArray *path =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
51. NSString *documentsDirectory = [path objectAtIndex:0];
52. if(sqlite3_open([[documentsDirectorystringByAppendingPathComponent:dbName] UTF8String],&m_sql) !=SQLITE_OK)
53. {
54. NSLog(@"创建数据库失败");
55. return NO;
56. }
57. return YES;
58. }
59. //关闭数据库
60. -(void)closeDatabase
61. {
62. sqlite3_close(self.m_sql);
63. }
64. //创建表
65. -(BOOL)createTable:(NSString*)sqlCreateTable
66. {
67. if (![selfopenOrCreateDatabase:self.m_dbName]) {
68. return NO;
69. }
70. char *errorMsg;
71. if (sqlite3_exec (self.m_sql, [sqlCreateTable UTF8String],NULL, NULL, &errorMsg) != SQLITE_OK)
72. {
73. NSLog(@"创建数据表失败:%s",errorMsg);
74. return NO;
75. }
76. [selfcloseDatabase];
77. return YES;
78. }
79. //插入表
80. -(BOOL)InsertTable:(NSString*)sqlInsert
81. {
82. if (![selfopenOrCreateDatabase:self.m_dbName]) {
83. return NO;
84. }
85. char* errorMsg = NULL;
86. if(sqlite3_exec(self.m_sql, [sqlInsertUTF8String],0, NULL, &errorMsg) ==SQLITE_OK)
87. {
88. [selfcloseDatabase];
89. returnYES;
90. }
91. else
92. {
93. printf("更新表失败:%s",errorMsg);
94. [selfcloseDatabase];
95. return NO;
96. }
97. return YES;
98. }
99. //更新表
100. -(BOOL)UpdataTable:(NSString*)sqlUpdata
101. {
102. if (![selfopenOrCreateDatabase:self.m_dbName])
103. {
104. return NO;
105. }
106. char *errorMsg;
107. if (sqlite3_exec (self.m_sql, [sqlUpdata UTF8String],0, NULL, &errorMsg) !=SQLITE_OK)
108. {
109. [selfcloseDatabase];
110. returnYES;
111. }
112. else
113. {
114. returnNO;
115. }
116. return YES;
117. }
118. //查询表
119. -(NSArray*)querryTable:(NSString*)sqlQuerry
120. {
121. if (![selfopenOrCreateDatabase:self.m_dbName]) {
122. return nil;
123. }
124. int row = 0;
125. int column = 0;
126. char*    errorMsg = NULL;
127. char**    dbResult = NULL;
128. NSMutableArray*    array = [[NSMutableArrayalloc] init];
129. if(sqlite3_get_table(m_sql, [sqlQuerryUTF8String], &dbResult, &row,&column,&errorMsg ) == SQLITE_OK)
130. {
131. if (0 == row) {
132. [self closeDatabase];
133. return nil;
134. }
135. int index = column;
136. for(int i =0; i < row ; i++ ) {
137. NSMutableDictionary*    dic = [[NSMutableDictionaryalloc] init];
138. for(int j =0 ; j < column; j++ ) {
139. if (dbResult[index]) {
140. NSString*    value = [[NSStringalloc] initWithUTF8String:dbResult[index]];
141. NSString*    key = [[NSStringalloc] initWithUTF8String:dbResult[j]];
142. [dic setObject:value forKey:key];
143. [value release];
144. [key release];
145. }
146. index ++;
147. }
148. [array addObject:dic];
149. [dic release];
150. }
151. }else {
152. printf("%s",errorMsg);
153. [selfcloseDatabase];
154. return nil;
155. }
156. [selfcloseDatabase];
157. return [array autorelease];
158. }
159. //select
160. int processData(void* arrayResult,int columnCount,char** columnValue,char** columnName)
161. {
162. int i;
163. NSMutableDictionary* dic = [[NSMutableDictionaryalloc] init];
164. for( i = 0 ; i < columnCount; i ++ )
165. {
166. if (columnValue[i])
167. {
168. NSString* key = [[NSStringalloc] initWithUTF8String:columnName[i]];
169. NSString* value = [[NSStringalloc] initWithUTF8String:columnValue[i]];
170. [dic setObject:value forKey:key];
171. }
172. }
173. [(NSMutableArray*)arrayResult addObject:dic];
174. [dic release];
175. return 0;
176. }
177. //select
178. -(NSArray*)querryTableByCallBack:(NSString*)sqlQuerry
179. {
180. if (![selfopenOrCreateDatabase:self.m_dbName])
181. {
182. return nil;
183. }
184. char*    errorMsg = NULL;
185. NSMutableArray* arrayResult = [[NSMutableArrayalloc] init];
186. if (sqlite3_exec(self.m_sql,[sqlQuerryUTF8String],processData,(void*)arrayResult,&errorMsg) !=SQLITE_OK)
187. {
188. printf("查询出错:%s",errorMsg);
189. }
190. [selfcloseDatabase];
191. return [arrayResult autorelease];
192. }
193. @end
194. //
195. /*IOS开发中sqlite数据库的使用方法。
196. *sqlite数据库初始化，复制到用户目录，并判断是否数据库已经存在，或者复制是否成功；
197. *在AppDelegate.m中输入以下代码，以便复制预置数据库到指定doucment目录
198. */
199. - (BOOL) initializeDb
200. {
201. NSLog (@"initializeDB");
202. NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
203. NSString *documentFolderPath = [searchPaths objectAtIndex: 0];
204. //查看文件目录
205. NSLog(@"%@",documentFolderPath);
206. dbFilePath = [documentFolderPath stringByAppendingPathComponent:@"shopping.db"];
207. [dbFilePath retain];
208. if (! [[NSFileManager defaultManager] fileExistsAtPath: dbFilePath])
209. {
210. NSString *backupDbPath = [[NSBundle mainBundle] pathForResource:@"shopping" ofType:@"db"];
211. if (backupDbPath == nil)
212. {
213. return NO;
214. }
215. else
216. {
217. BOOL copiedBackupDb = [[NSFileManager defaultManager] copyItemAtPath:backupDbPath toPath:dbFilePath error:nil];
218. if (! copiedBackupDb)
219. {
220. return NO;
221. }
222. }
223. }
224. return YES;
225. }
226. - (void)applicationDidFinishLaunching:(UIApplication *)application
227. {
228. if (! [self initializeDb])
229. {
230. NSLog (@"couldn't init db");
231. return;
232. }
233. [window addSubview:tabBarController.view];
234. }