ios 封装sqllite3接口

浏览数：26 / 时间：2015年06月12日

2013-03-25 17:41 261人阅读评论(0) 收藏举报

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//
#import <Foundation/Foundation.h>
#import "sqlite3.h"
@interface Sqllib : NSObject
{
sqlite3 *m_sql;
NSString *m_dbName;
}
@property(nonatomic)sqlite3* m_sql;
@property(nonatomic,retain)NSString* m_dbName;
-(id)initWithDbName:(NSString*)dbname;
-(BOOL)openOrCreateDatabase:(NSString*)DbName;
-(BOOL)createTable:(NSString*)sqlCreateTable;
-(void)closeDatabase;
-(BOOL)InsertTable:(NSString*)sqlInsert;
-(BOOL)UpdataTable:(NSString*)sqlUpdata;
-(NSArray*)querryTable:(NSString*)sqlQuerry;
-(NSArray*)querryTableByCallBack:(NSString*)sqlQuerry;
@end
//
#import "sqllib.h"
@implementation Sqllib
@synthesize m_sql;
@synthesize m_dbName;
-(id) initWithDbName:(NSString*)dbname
{
self = [super init];
if (self != nil) {
if ([self openOrCreateDatabase:dbname]) {
[self closeDatabase];
}
}
return self;
}
-(id) init
{
NSAssert(0,@"Never Use this.Please Call Use initWithDbName:(NSString*)");
return nil;
}
-(void) dealloc
{
self.m_sql = nil;
self.m_dbName =nil;
[super dealloc];
}
//创建数据库
-(BOOL)openOrCreateDatabase:(NSString*)dbName
{
self.m_dbName = dbName;
NSArray *path =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [path objectAtIndex:0];
if(sqlite3_open([[documentsDirectorystringByAppendingPathComponent:dbName] UTF8String],&m_sql) !=SQLITE_OK)
{
NSLog(@"创建数据库失败");
return NO;
}
return YES;
}
//关闭数据库
-(void)closeDatabase
{
sqlite3_close(self.m_sql);
}
//创建表
-(BOOL)createTable:(NSString*)sqlCreateTable
{
if (![selfopenOrCreateDatabase:self.m_dbName]) {
return NO;
}
char *errorMsg;
if (sqlite3_exec (self.m_sql, [sqlCreateTable UTF8String],NULL, NULL, &errorMsg) != SQLITE_OK)
{
NSLog(@"创建数据表失败:%s",errorMsg);
return NO;
}
[selfcloseDatabase];
return YES;
}
//插入表
-(BOOL)InsertTable:(NSString*)sqlInsert
{
if (![selfopenOrCreateDatabase:self.m_dbName]) {
return NO;
}
char* errorMsg = NULL;
if(sqlite3_exec(self.m_sql, [sqlInsertUTF8String],0, NULL, &errorMsg) ==SQLITE_OK)
{
[selfcloseDatabase];
returnYES;
}
else
{
printf("更新表失败:%s",errorMsg);
[selfcloseDatabase];
return NO;
}
return YES;
}
//更新表
-(BOOL)UpdataTable:(NSString*)sqlUpdata
{
if (![selfopenOrCreateDatabase:self.m_dbName])
{
return NO;
}
char *errorMsg;
if (sqlite3_exec (self.m_sql, [sqlUpdata UTF8String],0, NULL, &errorMsg) !=SQLITE_OK)
{
[selfcloseDatabase];
returnYES;
}
else
{
returnNO;
}
return YES;
}
//查询表
-(NSArray*)querryTable:(NSString*)sqlQuerry
{
if (![selfopenOrCreateDatabase:self.m_dbName]) {
return nil;
}
int row = 0;
int column = 0;
char* errorMsg = NULL;
char** dbResult = NULL;
NSMutableArray* array = [[NSMutableArrayalloc] init];
if(sqlite3_get_table(m_sql, [sqlQuerryUTF8String], &dbResult, &row,&column,&errorMsg ) == SQLITE_OK)
{
if (0 == row) {
[self closeDatabase];
return nil;
}
int index = column;
for(int i =0; i < row ; i++ ) {
NSMutableDictionary* dic = [[NSMutableDictionaryalloc] init];
for(int j =0 ; j < column; j++ ) {
if (dbResult[index]) {
NSString* value = [[NSStringalloc] initWithUTF8String:dbResult[index]];
NSString* key = [[NSStringalloc] initWithUTF8String:dbResult[j]];
[dic setObject:value forKey:key];
[value release];
[key release];
}
index ++;
}
[array addObject:dic];
[dic release];
}
}else {
printf("%s",errorMsg);
[selfcloseDatabase];
return nil;
}
[selfcloseDatabase];
return [array autorelease];
}
//select
int processData(void* arrayResult,int columnCount,char** columnValue,char** columnName)
{
int i;
NSMutableDictionary* dic = [[NSMutableDictionaryalloc] init];
for( i = 0 ; i < columnCount; i ++ )
{
if (columnValue[i])
{
NSString* key = [[NSStringalloc] initWithUTF8String:columnName[i]];
NSString* value = [[NSStringalloc] initWithUTF8String:columnValue[i]];
[dic setObject:value forKey:key];
}
}
[(NSMutableArray*)arrayResult addObject:dic];
[dic release];
return 0;
}
//select
-(NSArray*)querryTableByCallBack:(NSString*)sqlQuerry
{
if (![selfopenOrCreateDatabase:self.m_dbName])
{
return nil;
}
char* errorMsg = NULL;
NSMutableArray* arrayResult = [[NSMutableArrayalloc] init];
if (sqlite3_exec(self.m_sql,[sqlQuerryUTF8String],processData,(void*)arrayResult,&errorMsg) !=SQLITE_OK)
{
printf("查询出错:%s",errorMsg);
}
[selfcloseDatabase];
return [arrayResult autorelease];
}
@end
//
/*IOS开发中sqlite数据库的使用方法。
*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；
*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
*/
- (BOOL) initializeDb
{
NSLog (@"initializeDB");
NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentFolderPath = [searchPaths objectAtIndex: 0];
//查看文件目录
NSLog(@"%@",documentFolderPath);
dbFilePath = [documentFolderPath stringByAppendingPathComponent:@"shopping.db"];
[dbFilePath retain];
if (! [[NSFileManager defaultManager] fileExistsAtPath: dbFilePath])
{
NSString *backupDbPath = [[NSBundle mainBundle] pathForResource:@"shopping" ofType:@"db"];
if (backupDbPath == nil)
{
return NO;
}
else
{
BOOL copiedBackupDb = [[NSFileManager defaultManager] copyItemAtPath:backupDbPath toPath:dbFilePath error:nil];
if (! copiedBackupDb)
{
return NO;
}
}
}
return YES;
}
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
if (! [self initializeDb])
{
NSLog (@"couldn‘t init db");
return;
}
[window addSubview:tabBarController.view];
}