NSMutableArray memory leak when reloading objects
- by Davin
I am using Three20/TTThumbsviewcontroller to load photos. I am struggling since quite a some time now to fix memory leak in setting photosource. I am beginner in Object C & iOS memory management. Please have a look at following code and suggest any obvious mistakes or any errors in declaring and releasing variables.
-- PhotoViewController.h
@interface PhotoViewController : TTThumbsViewController <UIPopoverControllerDelegate,CategoryPickerDelegate,FilterPickerDelegate,UISearchBarDelegate>{
......
NSMutableArray *_photoList;
......
@property(nonatomic,retain) NSMutableArray *photoList;
-- PhotoViewController.m
@implementation PhotoViewController
....
@synthesize photoList;
.....
- (void)LoadPhotoSource:(NSString *)query:(NSString *)title:(NSString* )stoneName{
NSLog(@"log- in loadPhotosource method");
if (photoList == nil)
photoList = [[NSMutableArray alloc] init ];
[photoList removeAllObjects];
@try {
sqlite3 *db;
NSFileManager *fileMgr = [NSFileManager defaultManager];
NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *dbPath = [documentsPath stringByAppendingPathComponent: @"DB.s3db"];
BOOL success = [fileMgr fileExistsAtPath:dbPath];
if(!success)
{
NSLog(@"Cannot locate database file '%@'.", dbPath);
}
if(!(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK))
{
NSLog(@"An error has occured.");
}
NSString *_sql = query;//[NSString stringWithFormat:@"SELECT * FROM Products where CategoryId = %i",[categoryId integerValue]];
const char *sql = [_sql UTF8String];
sqlite3_stmt *sqlStatement;
if(sqlite3_prepare(db, sql, -1, &sqlStatement, NULL) != SQLITE_OK)
{
NSLog(@"Problem with prepare statement");
}
if ([stoneName length] != 0)
{
NSString *wildcardSearch = [NSString stringWithFormat:@"%@%%",[stoneName stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]];
sqlite3_bind_text(sqlStatement, 1, [wildcardSearch UTF8String], -1, SQLITE_STATIC);
}
while (sqlite3_step(sqlStatement)==SQLITE_ROW) {
NSString* urlSmallImage = @"Mahallati_NoImage.png";
NSString* urlThumbImage = @"Mahallati_NoImage.png";
NSString *designNo = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,2)];
designNo = [designNo stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *desc = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,7)];
desc = [desc stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *caption = designNo;//[designNo stringByAppendingString:desc];
caption = [caption stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *smallFilePath = [documentsPath stringByAppendingPathComponent: [NSString stringWithFormat:@"Small%@.JPG",designNo] ];
smallFilePath = [smallFilePath stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if ([fileMgr fileExistsAtPath:smallFilePath]){
urlSmallImage = [NSString stringWithFormat:@"Small%@.JPG",designNo];
}
NSString *thumbFilePath = [documentsPath stringByAppendingPathComponent: [NSString stringWithFormat:@"Thumb%@.JPG",designNo] ];
thumbFilePath = [thumbFilePath stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
if ([fileMgr fileExistsAtPath:thumbFilePath]){
urlThumbImage = [NSString stringWithFormat:@"Thumb%@.JPG",designNo];
}
NSNumber *photoProductId = [NSNumber numberWithInt:(int)sqlite3_column_int(sqlStatement, 0)];
NSNumber *photoPrice = [NSNumber numberWithInt:(int)sqlite3_column_int(sqlStatement, 6)];
char *productNo1 = sqlite3_column_text(sqlStatement, 3);
NSString* productNo;
if (productNo1 == NULL)
productNo = nil;
else
productNo = [NSString stringWithUTF8String:productNo1];
Photo *jphoto = [[[Photo alloc] initWithCaption:caption
urlLarge:[NSString stringWithFormat:@"documents://%@",urlSmallImage]
urlSmall:[NSString stringWithFormat:@"documents://%@",urlSmallImage]
urlThumb:[NSString stringWithFormat:@"documents://%@",urlThumbImage]
size:CGSizeMake(123, 123)
productId:photoProductId
price:photoPrice
description:desc
designNo:designNo
productNo:productNo
] autorelease];
[photoList addObject:jphoto];
[jphoto release];
}
}
@catch (NSException *exception) {
NSLog(@"An exception occured: %@", [exception reason]);
}
self.photoSource = [[[MockPhotoSource alloc]
initWithType:MockPhotoSourceNormal
title:[NSString stringWithFormat: @"%@",title]
photos: photoList
photos2:nil] autorelease];
}
Memory leaks happen when calling above LoadPhotosource method again with different query...
I feel its something wrong in declaring NSMutableArray (photoList), but can't figure out how to fix memory leak.
Any suggestion is really appreciated.
