Invalid frame position when using demo view controller

[dvkch]

Hi,

I am trying out your library and I am quickly facing a strange issue. The demo project runs fine on iOS6-7-8 and iPhone 4-5-6 (even after enabling iPhone 6 screen support), though if I use the exact same code in my own app it fails. Literally the same code, except for the added #import <UIKit/UIKit.h> in the view controller header.

The exception is thrown at line 24 of the view controller class: self.view.frame = animationFrame.frame; with exception CALayer position contains NaN: [nan nan].

Here is a link to the sample project: https://github.com/dvkch/JazzHandsBug1063 .

Thanks for taking time to look into this, Stan

[jhersh]

Ahoy @dvkch! Sorry I missed this until now.

I can't find that code you mention at line 24 in any file of your sample project. Do you have a direct link?

That said, I don't think you want to set a view controller's view frame to be equal to a keyframe animation object's frame, as the keyframe can and will change as the animation is played. Plus, the frame may not be set until the animation begins, which might explain this error you're seeing. Perhaps you meant to add the animation to a subview instead?

[dvkch]

No problem. The view controller is IFTTTJazzHandsViewController, a direct copy from the example project in this library. The trace is:
-[IFTTTAnimatedScrollViewController scrollViewDidScroll:] line 45
-[IFTTTAnimator animate:] line 34
-[IFTTTFrameAnimation animate:] line 24

Here is a screenshot of the debug session in XCode:

The issue is: the same exact code works perfectly in your demo project, but it doesn't in a new project.
I wanted to know why that is because i want to start using your app by playing with this demo tutorial and integrate it in my own project.

[jhersh]

@dvkch You are creating animations and references for two images (Unicorn and IFTTT) that are not included in your sample app.

[dvkch]

Hehe indeed. Sorry for the trouble!