我在我的应用程序中使用了sqlite数据库。我正在进行CURD操作。我从json获取数据然后我将数据转换为数组，然后从数组中将数据插入到sqlite数据库中。在我的应用程序中数据可以达到超过1000条记录。当数据库完成后，我得到内存警告。
我有一个插入数据的功能。首先检查数据是否存在然后更新数据，否则插入新记录
[[DBManager getSharedInstance]insertData:object];
功能定义 -
(BOOL) insertData:(SubComponent *)subcomponent
{
const char *dbpath = [databasePath UTF8String];
if([self getSubComponentDataBySubclientClientInspectionid:subcomponent.componentid : subcomponent.componentsubclientid:subcomponent.componentClientid : subcomponent.componentinspectionid] != nil)
{
[self updateCompSubComponentDataBySubclientId:subcomponent];
return YES;
}
else
{
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
if (sqlite3_exec(database, [@"PRAGMA CACHE_SIZE=500000;" UTF8String], NULL, NULL, NULL) == SQLITE_OK) {
NSLog(@"Successfully changed cache size");
}
else
NSLog(@"Error: failed to set cache size with message %s.", sqlite3_errmsg(database));
NSLog(@"inside isnert query");
NSString *insertSQL = [NSString stringWithFormat:
@"insert into subcomponent(subcomponentid,name,createddate,subclientid,clientid,cliententityid, inspectionid, initialstatus,componentclientname,componentsubclientname, checkedstatus) values (\"%@\",\"%@\",\"%@\",\"%@\",\"%@\",\"%@\",\"%@\",\"%ld\",\"%@\",\"%@\",\"2\")",subcomponent.componentid,subcomponent.componentName,subcomponent.componentcreateddate,subcomponent.componentsubclientid,subcomponent.componentClientid, subcomponent.componentEntityid,subcomponent.componentinspectionid,(long)subcomponent.componentStatus,subcomponent.componentClientName,subcomponent.componentSubclientName];
NSLog(@"%@",insertSQL);
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(database, insert_stmt,-1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
sqlite3_finalize(statement);
return YES;
}
else
{
NSLog(@"REMASH DB ERROR %s",sqlite3_errmsg(database));
// sqlite3_reset(statement);
//sqlite3_close(database);
sqlite3_finalize(statement);
return NO;
}
}
sqlite3_close(database);
}
return YES;
}
获取数据功能
- (SubComponent*) getSubComponentDataBySubclientClientInspectionid:(NSString*)componentid : (NSString *)subclientid : (NSString *)clientId : (NSString *)inspectionid
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat:@"select * from subcomponent where subcomponentid = \"%@\" and subclientid = \"%@\" and clientid = \"%@\" and inspectionid = \"%@\"",componentid,subclientid, clientId,inspectionid];
NSLog(@"gghgh query is %@",querySQL);
const char *query_stmt = [querySQL UTF8String];
SubComponent *resultArray = [[SubComponent alloc]init];
if (sqlite3_prepare_v2(database,query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *component_id = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 0)];
resultArray.componentid = component_id;
NSString *name = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 1)];
resultArray.componentName = name;
NSString *createddate = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 2)];
resultArray.componentcreateddate = createddate;
NSString *subclientid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 3)];
resultArray.componentsubclientid = subclientid;
NSString *clientid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 4)];
resultArray.componentClientid = clientid;
NSString *entityid = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(statement, 5)];
resultArray.componentEntityid = entityid;
NSString *inspectionid = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 6)];
resultArray.componentinspectionid = inspectionid;
NSString *clientName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 8)];
resultArray.componentClientName = clientName;
NSString *subclientName = [[NSString alloc]initWithUTF8String:(const char *) sqlite3_column_text(statement, 9)];
resultArray.componentSubclientName = subclientName;
// sqlite3_finalize(statement);
// sqlite3_close(database);
return resultArray;
}
else
{
// sqlite3_finalize(statement);
// sqlite3_close(database);
return nil;
}
}
else
{
NSLog(@"error is %s",sqlite3_errmsg(database));
}
}
// sqlite3_reset(statement);
// sqlite3_finalize(statement);
sqlite3_close(database);
return nil;
}
更新功能
-(void)updateCompSubComponentDataBySubclientId:(SubComponent *)subcomponent
{
NSLog(@"inside update data");
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
if (sqlite3_exec(database, [@"PRAGMA CACHE_SIZE=500000;" UTF8String], NULL, NULL, NULL) == SQLITE_OK) {
NSLog(@"Successfully changed cache size");
}
else
NSLog(@"Error: failed to set cache size with message %s.", sqlite3_errmsg(database));
NSString *querySql=[NSString stringWithFormat:
@"UPDATE subcomponent SET name=\"%@\", createddate=\"%@\", cliententityid =\"%@\",componentclientname=\"%@\", componentsubclientname = \"%@\", checkedstatus = \"2\" where subcomponentid = \"%@\" and subclientid = \"%@\" and clientid = \"%@\" and inspectionid =\"%@\"",subcomponent.componentName,subcomponent.componentcreateddate, subcomponent.componentEntityid,subcomponent.componentClientName,subcomponent.componentSubclientName,subcomponent.componentid, subcomponent.componentsubclientid,subcomponent.componentClientid,subcomponent.componentinspectionid];
const char *sql=[querySql UTF8String];
if(sqlite3_prepare_v2(database,sql, -1, &statement, NULL) == SQLITE_OK)
{
if(SQLITE_DONE != sqlite3_step(statement))
{
NSLog(@"REMASH Error while updating. '%s'", sqlite3_errmsg(database));
}
else
{
//sqlite3_reset(statement);
NSLog(@"Update done successfully!");
}
}
NSLog(@"NOT OK");
sqlite3_finalize(statement);
sqlite3_close(database);
}
}
PS ：有人可以通过查看我的代码来建议是否使用sqlite_finilaize（），sqlite_close（）。sqlite_reset（）是正确的。因为内存在增加。
答案 0 :(得分：-2)