How to assign values to images [closed] - iphone

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Alright, so I have 5 custom images total.
Heres the values I need to set each image to:
Image1 = 1
Image2 = 2
Image3 = 3
Image4 = 4
Image5 = 5
I need values assigned to these because I want to have xcode randomly place them on the view until it reaches a value of 50. So im assuming I need some kind of loop that adds up the values until 50 is reached?
How do I assign values to these images since it brings up a warning when trying to assign an int value to a UIImage. Also, on a side note what method would I use to randomly place the images on the view without overlapping?
Thanks for any and all help!

Answer 1

Your app will be placing UIImageViews, not UIImages onto a view. Like all UIView subclasses, UIImageView has an NSInteger tag property, but if I understand the problem correctly, I don't think you need that, either.
// add count randomly selected images to random positions on self.view
// (assumes self is a kind of UIViewController)
- (void)placeRandomImages:(NSInteger)count {
for (NSInteger i=0; i<count; ++i) {
UIImage *image = [self randomImage];
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = [self randomFrameForImage:image];
[self.view addSubview:imageView];
// add a tag here, if you want, but I'm not sure what for
// imageView.tag = i;
}
}
// answer a random image from the app's bundle
// assumes the images are named image-x where x = 0..4
- (UIImage *)randomImage {
NSInteger imageNumber = arc4random() % 5;
NSString *imageName = [NSString stringWithFormat:#"image-%d", imageNumber];
return [UIImage imageNamed:imageName];
}
// answer a random position for the passed image, keeping it inside the view bounds
- (CGRect)randomFrameForImage:(UIImage *)image {
CGFloat imageWidth = image.width;
CGFloat imageHeight = image.height;
CGFloat maxX = CGRectGetMaxX(self.view.bounds) - imageWidth;
CGFloat maxY = CGRectGetMaxY(self.view.bounds) - imageHeight;
// random location, but always inside my view bounds
CGFloat x = arc4random() % (NSInteger)maxX;
CGFloat y = arc4random() % (NSInteger)maxY;
return CGRectMake(x,y,imageWidth,imageHeight);
}

Answer 2

If want to assign an arbitrary integer value, I would use the tag property on UIImageView.
NSInteger currentTag = 50;
while (currentTag > 0) {
UIImageView *imageView = [UIImageView alloc initWithImage:image];
imageView.tag = currentTag;
[self.view addSubView:imageView];
currentTag--;
}

Answer 3

Put the images into an NSArray then from NSHipster:
How Do I Pick a Random Element from an NSArray
Use arc4random_uniform(3) to generate a random number in the range of a non-empty array.
if ([array count] > 0) {
id obj = array[arc4random_uniform([array count])];
}