It does not work on iPhone 4s or earlier iOS version, I guess!

[CoderGYC]

The type is not match. @property (assign, nonatomic) CGFloat value;

• (void)setValue:(double)val

[Arpit723]

Even in my iPhone 5 simulator also it is not working, would it be same issue ? Ans: I solved this issue by changing the float value to double in below functions.

(void)setValue:(double)val - (void)setStepValue:(double)stepValue

And all the functions which include double as an arguement.

Thanks @CoderGYC