Question

This is my first time posting something, first of all you got to know two things, I’m very rookie on objective-c and english is not my native language, so if you don’t understand well please ask 🙂

Ok, I’m making an iPad app for my kid, so it consists of random sound and a random image on every tap. But after some taps the screen gets full of images so I want to know how to “clean” the screen after X taps.

Some code here:

- (void)oneFingerOneTap{


int randomNumber = arc4random() % 9 + 1;
int randX = arc4random() % 768 + 1;
int randY = arc4random() % 1004 + 1;

NSString *fileName = @"Sound";
NSString *ext = @".caf";
NSString *randString = [NSString stringWithFormat:@"%d", randomNumber];
NSString *completeSound = [NSString stringWithFormat:@"/%@%@%@", fileName, randString, ext];

NSString *path = [NSString stringWithFormat:@"%@%@", [[NSBundle mainBundle] resourcePath], completeSound];

SystemSoundID soundID;
NSURL *filePath = [NSURL fileURLWithPath:path isDirectory:NO];


AudioServicesCreateSystemSoundID((__bridge CFURLRef)filePath, &soundID);

AudioServicesPlaySystemSound(soundID);


self.imgView = [[UIImageView alloc] initWithFrame:CGRectMake(randX, randY, 60, 60)];
self.imgView.image = [UIImage imageNamed:@"background.jpg"];
[self.view addSubview:self.imgView];




NSLog(@" %d", randX);

count++;
} 

So I make a global int (count) to know how much taps done yet.

ps. I know the image isn’t random at the time, it doesn’t matter right now.

Again, how can I delete all the images done before?

I tried with self.imgView.hidden = TRUE; but it only hidden the last image.

Answer 1

try this code

 for (UIView *subVw in self.view.subviews) {
    if ([subVw isKindOfClass:[UIImageView class]]) {
        [subVw removeFromSuperview];
    }
}