I am asking for an Value like this:
[self.layer valueForKeyPath:@"transform.rotation.z"]
bit I need to pass it to a method which takes a CGFloat as parameter. What's the casting trick here?
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In Swift:
let f = view.layer.valueForKeyPath("transform.rotation.z")!.floatValue
In Objective-C:
NSNumber* n = [self.layer valueForKeyPath:@"transform.rotation.z"];
CGFloat f = [n floatValue];
Rhythmic Fistman
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Wrong, `floatValue` is `float`, while `CGFloat` is `double` on 64-bit platforms. – wonder.mice Mar 29 '18 at 23:44
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You’re re right! Here’s an answer that does it properly https://stackoverflow.com/a/34301580/22147 – Rhythmic Fistman Mar 30 '18 at 05:18
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Or just `ifdef` on `CGFLOAT_IS_DOUBLE`. – wonder.mice Apr 01 '18 at 19:36
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If you wanted a more concise, one line way to do that, you can do:
CGFloat f = [[self.layer valueForKeyPath:@"transform.rotation.z"] floatValue];
Neil
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