iOS Custom Views don't show up

Question

I'm developing an app (by a tutorial, but the tutorial is written for Swift and I'm learning Objective-C. tutorial source

But I have a problem, I'm developing a Custom Controller (RatingController), which works when I only use one of this custom controller in a scene. The Custom controller source is here:

@implementation RatingController

//MARK: Properties
const int spacing = 5;
const int starCount = 5;
UIButton *ratingButtons[starCount];

-(void)setRating:(int)rating{
    _rating = rating;
    [self setNeedsLayout];
}

-(int)getRating{
    return _rating;
}

//MARK: Initialization
- (instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
    if (self) {
        //load the images
        UIImage *filledStarImage = [UIImage imageNamed:@"filledStar"];
        UIImage *emptyStarImage = [UIImage imageNamed:@"emptyStar"];

        for (int i = 0; i < starCount; i++) {
            //create button
            UIButton *button = [[UIButton alloc]init];

            //set the images
            [button setImage:emptyStarImage forState:UIControlStateNormal];
            [button setImage:filledStarImage forState:UIControlStateSelected];
            [button setImage:filledStarImage forState:UIControlStateHighlighted|UIControlStateSelected];

            //No additional highlight when switching state
            button.adjustsImageWhenHighlighted = false;

            //hook up the method which should be executed when the user touches a button
            [button addTarget:self action:@selector(ratingButtonTapped:) forControlEvents:UIControlEventTouchDown];

            //add the button the the ratingButton array
            ratingButtons[i] = button;

            //add the button to the view
            [self addSubview:button];
        }
    }
    return self;
}

-(void) layoutSubviews{
    //Set the button's width and height to the height of the frame.
    const int buttonSize = self.frame.size.height;    
    CGRect buttonFrame = CGRectMake(0, 0, buttonSize, buttonSize);

    for(int i = 0; i < starCount; i++){
        buttonFrame.origin.x = (i * (buttonSize + spacing));
        ratingButtons[i].frame = buttonFrame;
    }

    [self updateButtonSelectionState];
}

-(CGSize) intrinsicContentSize{
    const int buttonSize = self.frame.size.height;
    const int width = (buttonSize * starCount) + (spacing * (starCount -1));

    return CGSizeMake(width, buttonSize);
}

//MARK: Button Action
-(void) updateButtonSelectionState{
    for(int i = 0; i < starCount; i++)
        ratingButtons[i].selected = i < _rating;
}

-(void) ratingButtonTapped:(UIButton *) button{
    for(int i = 0; i < starCount; i++){
        if(ratingButtons[i] == button){
            _rating = i + 1;
        }
    }
    [self updateButtonSelectionState];
}

@end

When I put 2 of those custom controllers in 1 scene I can only see the one which is added at the end (in a list only the last List item shows the custom controller) I hope someone can help me.

Thank you very much already!

Answer 1

Edit2:

Changed the ratingButton array into a property and mutable array, this resolved the issue.

Edit:

Also check your buttons are being added to your ratingButtons array in your init and that the code in 'updateButtonSelectionState' in working correctly.

Original:

It's worth checking your 'rating' setter, set a break point and check that the correct value is being passed for the first two cells.

Also maybe download the complete example, it's in swift but at least it gives you something to compare against, good luck.