Too many open iOS files

Question

I am new to ios programming, when my application is working, I take these errors. I upload 950+ images to my application and I use ARC.

ImageIO: CGImageRead_mapData 'open' failed '/ Users / apple / Library / Application Support / iPhone Simulator / 6.1 / Applications / 16551664-4694-4742-85DC-2C3C0ADC5289 / demo.app / menu-24-20.png' error = 24 (Too many open files)

ImageIO: CGImageRead_mapData 'open' failed '/ Users / apple / Library / Application Support / iPhone Simulator / 6.1 / Applications / 16551664-4694-4742-85DC-2C3C0ADC5289 / demo.app / menu-24-20.png' error = 24 (Too many open files)

ImageIO: CGImageRead_mapData 'open' failed '/ Users / apple / Library / Application Support / iPhone Simulator / 6.1 / Applications / 16551664-4694-4742-85DC-2C3C0ADC5289 / demo.app / circle_green.png' error = 24 (Too many open files)

ImageIO: CGImageRead_mapData 'open' failed '/ Users / apple / Library / Application Support / iPhone Simulator / 6.1 / Applications / 16551664-4694-4742-85DC-2C3C0ADC5289 / demo.app / circle_green.png' error = 24 (Too many open files)

ImageIO: CGImageRead_mapData 'open' failed '/ Users / apple / Library / Application Support / iPhone Simulator / 6.1 / Applications / 16551664-4694-4742-85DC-2C3C0ADC5289 / demo.app / shopping_cart_1-512.png' error = 24 (Too many open files)

ImageIO: CGImageRead_mapData 'open' failed '/ Users / apple / Library / Application Support / iPhone Simulator / 6.1 / Applications / 16551664-4694-4742-85DC-2C3C0ADC5289 / demo.app / shopping_cart_1-512.png' error = 24 (Too many open files)

This code block is part of my application.

                while(sqlite3_step(compiledStatement) == SQLITE_ROW)  {
                    int UrunId = sqlite3_column_int(compiledStatement,0);
                    //NSString *urunNo= [NSString stringWithFormat:@"%i",UrunId];
                    UrunAdi = [NSString stringWithUTF8String:(char*)sqlite3_column_text(compiledStatement, 1)];
                    NSString *imageName= [NSString stringWithUTF8String:(char*)sqlite3_column_text(compiledStatement, 2)];
                    UIImageView *background = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+30, row*350, 175, 280)];

                    NSString *filePathBackGround = [[NSBundle mainBundle] pathForResource:@"BackImage" ofType:@"png"];
                    NSData *myData = [NSData dataWithContentsOfFile:filePathBackGround];                        
                    UIImage *blackBackGround = [UIImage imageWithData:myData];

                    [background setImage:blackBackGround];                                            
                    [scrollView addSubview:background];



                    NSString *filePathSepeteEkleButton = [[NSBundle mainBundle] pathForResource:@"sepeteEkleButtonImage" ofType:@"png"];
                    NSData *myDataButton = [NSData dataWithContentsOfFile:filePathSepeteEkleButton];

                    UIImage *sepeteEkleButtonImage = [UIImage imageWithData:myDataButton];
                    UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
                    [button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)];
                    [button setImage:sepeteEkleButtonImage forState:UIControlStateNormal];
                    [button addTarget:self
                               action:@selector(addToChart:)
                     forControlEvents:UIControlEventTouchUpInside];
                    button.tag = UrunId;



                    UILabel *buttonLabel=[[UILabel alloc]initWithFrame:CGRectMake(column*197+43,row*350+20,200,20)];
                    buttonLabel.textColor = [UIColor whiteColor];
                    buttonLabel.backgroundColor=[UIColor clearColor];
                    buttonLabel.text=UrunAdi;

                    [scrollView addSubview:button];

                    [scrollView addSubview:buttonLabel];


                    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                    NSString *documentsPath = [paths objectAtIndex:0]; //Get the docs directory
                    NSString *filePath = [documentsPath stringByAppendingPathComponent:imageName];

                    NSData *pngData = [NSData dataWithContentsOfFile:filePath];
                    if (pngData == nil) {
                        NSString *filePathResimYok= [[NSBundle mainBundle] pathForResource:@"resimYok" ofType:@"jpeg"];
                        NSData *myDataResimYok= [NSData dataWithContentsOfFile:filePathResimYok];
                        image2 = [UIImage imageWithData:myDataResimYok];//horoda
                    }else{
                        image2 = [UIImage imageWithData:pngData];
                    }
                    image2=[image2 imageByScalingAndCroppingForSize:CGSizeMake(175, 210)];

                    //UIImage *urunDetayImage = [UIImage imageNamed:image2];
                    UIButton * urunDetayButton = [UIButton buttonWithType:UIButtonTypeCustom];
                    [urunDetayButton setFrame:CGRectMake(column*197+38 , row*350+58, 159, 170)];
                    [urunDetayButton setImage:image2 forState:UIControlStateNormal];
                    [urunDetayButton addTarget:self
                                        action:@selector(buttonClicked:)
                              forControlEvents:UIControlEventTouchUpInside];
                    urunDetayButton.tag = UrunId;
                    [scrollView addSubview:urunDetayButton];

                    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(column*197+38,row*350+245,200,20)];
                    label.textColor = [UIColor whiteColor];
                    label.backgroundColor=[UIColor clearColor];
                    label.text=UrunAdi;
                    [scrollView addSubview:label];

I am trying to fix in 3 days. Please help me. Thank.

Answer 1

As far as I can see, your code looks great and works in a simulator (where there is a lot of memory), this should work. A few tips:

1) dataWithContentsOfFile:options:error: dataWithContentsOfFile:, NSDataReadingUncached ( ) - nil .

2) NSCache, , , . , .

3) UIImage imageWithContentsOfFile: , . UIImage .