Question

I’m creating an universal application and my CCMenu appears just fine on both iPhone, iPhone 4 and iPad. However the buttons do nothing when touched on the iPad.

I have no specific iPad code other than modifying the contentScaling property so that the iPad uses the same images as the iPhone 4. This means that the same images work on iPhone 4 but not on the iPad.

I am using cocos2d 0.99.rc0 and the iOS 4.1 SDK. I don’t even know where to start troubleshooting this.

The only oddity i noticed recently is that the iPad seems to draw the menu scene once, then quickly redraws it for some reason, moving everything one pixel or something. My menu class is very simple and has no “refreshing” code or anything that is supposed to move. This doesnt happen on either low or high res iPhones.

Here is my code, sloppy but yet very simple.

MainMenu.m:

    CCMenuItemImage * playItem = [self makeMenuButtonWithSprite:@"Play.png" withSelector:@selector(play:)];

    CCMenuItemImage * resumeItem = [self makeMenuButtonWithSprite:@"Resume.png" withSelector:@selector(resume:)];

    CCMenuItemImage * optionsItem = [self makeMenuButtonWithSprite:@"Options.png" withSelector:@selector(options:)];

    CCMenuItemImage * helpItem = [self makeMenuButtonWithSprite:@"Help.png" withSelector:@selector(help:)];

    CCMenu *myMenu;

    // Check if there is a valid savegame by comparing versions.
    if ([[uD stringForKey:@"CFBundleVersion"] isEqualToString:[[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"]] ) {
        myMenu = [CCMenu menuWithItems:playItem, resumeItem, optionsItem, helpItem, nil];
    } else {
        myMenu = [CCMenu menuWithItems:playItem, optionsItem, helpItem, nil];
    }

    // Arrange the menu items vertically
    [myMenu alignItemsVerticallyWithPadding:0.0f];
    myMenu.position = ccp(dB.wWidth/2,dB.wHeight/2);

    // add the menu to your scene
    [self addChild:myMenu z:100];

And the CCMenuItemImage factory:

- (CCMenuItemImage *)makeMenuButtonWithSprite:(NSString *)spriteFileName withSelector:(SEL)selector {
    CCSprite *spriteForButton = [CCSprite spriteWithFile:spriteFileName];
    spriteForButton.anchorPoint = ccp(0.5f,0.5f);
    CCMenuItemImage * buttonImage =[CCMenuItemImage itemFromNormalImage:@"button.png"
                                                      selectedImage: @"button.png"
                                                             target:self
                                                           selector:selector];
    [buttonImage addChild:spriteForButton z:100];
    spriteForButton.position = ccp([buttonImage boundingBox].size.width/2,([buttonImage boundingBox].size.height/2)-5);
    return buttonImage;
}

Answer 1

Problem found. This was related to my custom hack to make the iPad load retina graphics. The problem was in my appDelegate where i set the contentScaleFactor which made ccDirector scale and UIScreen scale mismatch.

Problem boiled down to graphics being big but cocos2d thinking that coordinates are low res.