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August 29, 2015 14:17
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AnyObject? to unwrapped value
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| let a = NSDictionary(object: NSNumber(bool: true), forKey: "boolKey") | |
| let b: AnyObject? = a.objectForKey("boolKey") | |
| if let b:AnyObject = b, c:NSNumber = (b as? NSNumber) where c.boolValue == true | |
| { | |
| println("It’s true.") | |
| } |
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The usual semantics of casting other types to bools are that 0 is NO/false and anything else is YES/true. This seems to be working correctly with casting directly to Bool even if the NSNumber originally contained a float.
If it’s important to find out more granularly what NSNumber contained originally and what type it was, then of course this shorthand is not sufficient and @fabrice’s solution should be used.