FMDatabase
FMDatabase 的使用方法
- (NSString*) getPath {
NSArray* paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES) ;
return [[pathsobjectAtIndex:0]stringByAppendingPathComponent:@"MyTable"] ;
}
１.创建数据库
-(void)CreateTable;
{
dataBase = [FMDatabasedatabaseWithPath:[selfgetPath]];
if (![dataBase open])
NSLog(@"OPEN FAIL");
}
[dataBaseexecuteUpdate:@"CREATE TABLE IF NOT EXISTS MyTable(aa float,bb text,cc integer,dd integer,ee text)"];
[dataBaseclose];
}
２.查询数据
-(void)QueryData
{
//获取数据
recordArray = [[NSMutableArrayalloc]init];
db = [[FMDatabasealloc]initWithPath:[selfgetPath]];
if ([db open]) {
FMResultSet *rs = [dbexecuteQuery:@"SELECT * FROM MyTable"];
while ([rs next]){
OneRecord = [[OneRecord alloc]init];
OneRecord.aa = [NSNumbernumberWithFloat:[rsdoubleForColumn:@"aa"]];
OneRecord.bb = [rs stringForColumn:@"bb"];
OneRecord.cc = [NSNumbernumberWithInt:[rsintForColumn:@"cc"]];
OneRecord.dd = [NSNumbernumberWithInt:[rsintForColumn:@"dd"]];
OneRecord.ee = [rs stringForColumn:@"ee"];
[recordArrayaddObject:OneRecord];
[OneRecordrelease];
}
[rs close];
[dbclose];
}
３.更新数据
-(void)UpdateData
{
if ([dbopen]) {
[dbbeginTransaction];
[dbexecuteUpdate:@"UPDATE MyTable SET aa = ? WHERE date = ?",aa1,aa2];
[dbexecuteUpdate:@"UPDATE MyTable SET bb = ? WHERE date = ?",bb1,bb2];
[dbexecuteUpdate:@"UPDATE MyTable SET cc = ? WHERE date = ?",cc1,cc2];
[dbexecuteUpdate:@"UPDATE MyTable SET dd = ? WHERE date = ?",dd1,dd2];
[dbcommit];
db close];
}
}
４。插入数据
-(void)insertData
{
//插入数据库
[dbbeginTransaction];
[dbexecuteUpdate:@"INSERT INTO MyTable (aa,bb,cc,dd,ee) VALUES (?,?,?,?,?)",
NSNumber numberWithFloat:aa],bb,cc,dd,ee];
db commit];
db close];
}