how to fix xcode warning “Expression result unused” in xcode 4 for UIActivityIndicatorView

Question

i am getting a warning for

    spinner.hidesWhenStopped;

warning : Expression result unused

hope any one know this
Thank you very much

Answer 1

Well hidesWhenStopped is a property of spinner and you don't do anything with it. Try setting a value as in

spinner.hidesWhenStopped = YES;

or

spinner.hidesWhenStopped = NO;

Answer 2

It seems you are trying to set the activity indicator to hide when stopped animating. The line spinner.hidesWhenStopped doesn't call the setter method. If you want to call the setter method you have to either use,

spinner.hidesWhenStopped = YES;

or,

[spinner setHidesWhenStopped:YES];