Adding shadow is UILabel Error

I have UILabel showtext and I have written code like

showtext.layer.shadowOpticity = 1.0;
showtext.layer.shadowRadius = 0.0;
showtext.layer.shadowColor = [UIColor blackColor].CGColor;
showtext.layer.shadowOffset = CGSizeMake(开发者_开发百科0.01,1.0);

And it's showing error "Accessing unknown "showOpticity" component of property".

Can anyone please help??

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You need to add the QuartzCore.framework to the project and then #import <QuartzCore/QuartzCore.h> in the .pch file.

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shadowOpticity should be shadowOpacity