So just a WARNING for others: Change the Static variables to instance variables!!

My iApp has a layer – call it “arrowLayer”. This layer animates/rotates around a fixed point in a controlled way, sweeping through a randomly-generated angle of at most roughly 90 degrees (M_PI/2 radians). I’d sure like to instantaneously sense the current angle of arrowLayer as it rotates because another part of the iApp would then “consume” the instantaneous rotation angle value for another purpose. I read through DialExample and I think I see what’s going on; for my iApp, the touchesBegan delegate really won’t help because direct user interaction/touch/etc. does not drive arrowLayer – an animation does this. I tried putting the angle “sensor” machinery directly in animationDidStart but this didn’t work. Next, in animationDidStart, I detected the relevant animation, called a Timer object (NSTimer scheduledTimerWithTimeInterval etc. etc.) which itself called a Selector function to sense the angle but that didn’t work either. What delegate do you think would do what I want? Or, more generally, do you have some other suggestion that might work? I Googled a lot for this and your idea came the closest. Thank you so much!

- Frank

my idea and make a menu with four options: home, screen 2, screen 3, screen 4.
each screen will be an XIB file.

thanks for help me.

Great tutorial.

One thing which I am struggling to understand is how can I check at which point the dial stops I’m trying to perform some action when the dial reaches a certain position.

https://skitch.com/aaronwardle/r76m1/dial

Thanks Aaron