ios中Pldatabase的用法(2)

@implementation AppGlobal

static NSString* strHostName;
static NSString* strVersion;
static PLSqliteDatabase* dbHelper;
static CConfigSetting* configSetting;

+ (BOOL) Init
{

    strHostName = HTTPURLPREFIX;

    strVersion = @"1.01";

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *dbPath = [[paths objectAtIndex:] stringByAppendingPathComponent:@"TaxOffice.db"];
    dbHelper = [[PLSqliteDatabase alloc] initWithPath:dbPath];  

    NSLog(@"TaxOffice.db  path = %@",dbPath);
    if (![DBInit initDB])
        return FALSE;

    configSetting = [[CConfigSetting alloc] init];
    return TRUE;
}

+ (void) DeInit
{
    [dbHelper close];
    [dbHelper release];
    [configSetting release];
}

+ (NSString*) DefaultHost
{
    return strHostName;
}

+ (NSString*) Version
{
    return strVersion;
}

+ (PLSqliteDatabase*) DbHelper
{
    return dbHelper;
}

+ (CConfigSetting*) ConfigSetting
{
    return configSetting;
}

@end

+(BOOL) initDB
{
    PLSqliteDatabase* idb = [AppGlobal DbHelper];

    if (![idb open]) {
        return FALSE;
    }

    // 配置信息表
    if (![idb tableExists:@"Config"]) {
        if (![idb executeUpdate: @"CREATE TABLE Config(key integer,value text)"])
            return FALSE;
    }

    // 客户信息表
    if (![idb tableExists:@"Customers"]) {
        NSString *strSql = @"CREATE TABLE Customers(id integer PRIMARY KEY autoincrement not null,"
                            "idno text, name text, tel text, remark text)";
        if (![idb executeUpdate: strSql]) {
            return FALSE;
        }
    }

    // 商品信息表
    if (![idb tableExists:@"Products"]) {
        NSString *strSql = @"CREATE TABLE Products(id integer PRIMARY KEY autoincrement not null,"
                            "idno text, name text, type integer, price real,"
                            "amount real, units text, remark text)";
        if (![idb executeUpdate: strSql]) {
            return FALSE;
        }
    }

    //

    return TRUE;
}