> > CGFloat is a float, yet it returns 0??????????? WTF?
> It isn’t a float. What you’re seeing in the debugger *confirms* that CGFloat
> is 64 bits.
Hmm.. I guess I don't understand that then. My logic was because
casting as a double returns the expected value, and casting as a CGFloat
does not, that it couldn't be a double...
> You’re also confusing the concepts of a cast as a value conversion and a cast
> as a re-interpretation of the type of variable (which re-interprets the
> underlying memory bits), and that’s what Greg was trying to alert you to:
> >> The debugger console may interpret it
> >> differently (using the cast as a hint of the correct return type,
> >> rather than a conversion of the real return type).
> There’s something else going on here. You might want to show some
> code, including the declaration of (say) your “laserXOffset” property,
> and the line where you set the scale.
The scale code I discovered was breaking due to a protocol's interface
being used on a class that defined a different type.
So, it went like this:
@protocol MenuInteractable <NSObject>
// other stuff
.... Meanwhile a class in the game library:
@interface CCNode : NSObject
@property(nonatomic,readwrite,assign) float scale;
// other stuff
so I had a class inherit from that:
@interface MenuItem : CCNode <MenuInteractable>
.. and an object using that was doing:
id<MenuInteractable> item = menuItem;
item.scale = 1.0f;
And then when I'd get into the setter it would be assigning the value 0.
Once I changed the MenuInteractable property to:
Then all my sprites were back.. I didn't even realize float was
what the actual real class was using, I assumed it was CGFloat and
that's why I put it on that protocol. And like I said, on my iPhone 6
and iPad3, it was totally ok with how that was.
Sorry for my temper fit. Sometimes I go argghhh when things make no
sense, and I am afraid I am going to need to go out and buy an iPhone7
now because I have no idea whether there's something else that's going
to behave differently on it compared to all these other devices.
Patrick J. Collins
On Tue, 18 Oct 2016, Quincey Morris wrote:
> On Oct 18, 2016, at 00:04 , Patrick J. Collins
> <patr...@collinatorstudios.com> wrote:
> >> Is your process 64-bit or 32-bit? CGFloat is float in 32-bit processes and
> >> double in 64-bit processes.
> > I'm not sure what you mean? The app is intended to work on both 32-bit
> > and 64-bit architectures. My iPad3 is a 32-bit device, and my iPhone-6
> > is a 64-bit device. On both of those devices everything is fine and
> > casting 1.0 as either a CGFloat or float with both result in 1.0 (as
> > expected). On the iPad pro, this bogus behavior happens where 1.0 cast
> > as a CGFloat becomes 0.
> You’re having a little temper fit here, which is fine by me except that it’s
> leading you into technical incorrectness, not to mention contradicting
> yourself. You said:
> > (lldb) expr (float)[self.fireable laserXOffset]
> > (float) $11 = 0
> > (lldb) expr (CGFloat)[self.fireable laserXOffset]
> > (CGFloat) $12 = 400
> > (lldb) expr (double)[self.fireable laserXOffset]
> > (double) $15 = 400
> That is, according to you, casting *as a float* produces 0, and casting as
> CGFloat or double [identical in iPad Pro as in iPhone 6/7] produce the same
> non-zero value. Somehow, though, you’ve mixed this up:
> So, back to your actual problem:
> > Yes, when I first tried my game on the iPad pro, a huge percentage of my
> > sprites were invisible, and it was because their scale was being set to
> > 1.0 as CGFloats, which was turning into 0. So I had to make sure all
> > the places where scale was being set was using an actual float type.
> > I feel like I should just sed -i my entire
> > project and turn all CGFloats into floats... But I am not sure if that's
> > really a good idea.
> No, that’s a really terrible idea. Voodoo solutions always are.
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