How to remove NSString Related Memory Leaks?
- by Rahul Vyas
in my application this method shows memory leak how do i remove leak?
-(void)getOneQuestion:(int)flashcardId categoryID:(int)categoryId
{
flashCardText = [[NSString alloc] init];
flashCardAnswer=[[NSString alloc] init];
//NSLog(@"%s %d %s", __FILE__, __LINE__, __PRETTY_FUNCTION__, __FUNCTION__);
sqlite3 *MyDatabase;
sqlite3_stmt *CompiledStatement=nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *MyDatabasePath = [documentsDirectory stringByAppendingString:@"/flashCardDatabase.sqlite"];
if(sqlite3_open([MyDatabasePath UTF8String],&MyDatabase) == SQLITE_OK)
{
sqlite3_prepare_v2(MyDatabase, "select flashCardText,flashCardAnswer,flashCardTotalOption from flashcardquestionInfo where flashCardId=? and categoryId=?", -1, &CompiledStatement, NULL);
sqlite3_bind_int(CompiledStatement, 1, flashcardId);
sqlite3_bind_int(CompiledStatement, 2, categoryId);
while(sqlite3_step(CompiledStatement) == SQLITE_ROW)
{
self.flashCardText = [NSString stringWithUTF8String:(char *)sqlite3_column_text(CompiledStatement,0)];
self.flashCardAnswer= [NSString stringWithUTF8String:(char *)sqlite3_column_text(CompiledStatement,1)];
flashCardTotalOption=[[NSNumber numberWithInt:sqlite3_column_int(CompiledStatement,2)] intValue];
}
sqlite3_reset(CompiledStatement);
sqlite3_finalize(CompiledStatement);
sqlite3_close(MyDatabase);
}
}
this method also shows leaks.....what's wrong with this method?
-(void)getMultipleChoiceAnswer:(int)flashCardId
{
if(optionsList!=nil)
[optionsList removeAllObjects];
else
optionsList = [[NSMutableArray alloc] init];
sqlite3 *MyDatabase;
sqlite3_stmt *CompiledStatement=nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *MyDatabasePath = [documentsDirectory stringByAppendingString:@"/flashCardDatabase.sqlite"];
if(sqlite3_open([MyDatabasePath UTF8String],&MyDatabase) == SQLITE_OK)
{
sqlite3_prepare_v2(MyDatabase,"select OptionText from flashCardMultipleAnswer where flashCardId=?", -1, &CompiledStatement, NULL);
sqlite3_bind_int(CompiledStatement, 1, flashCardId);
while(sqlite3_step(CompiledStatement) == SQLITE_ROW)
{
[optionsList addObject:[NSString stringWithUTF8String:(char *)sqlite3_column_text(CompiledStatement,0)]];
}
sqlite3_reset(CompiledStatement);
sqlite3_finalize(CompiledStatement);
sqlite3_close(MyDatabase);
}
}
