[swift-dev] about NSDictionary question

[David Smith]

Hi,

Try using setObject(forKey:) rather than setValue(forUndefinedKey:).

	David

> On Feb 24, 2016, at 1:12 AM, 张辉 via swift-dev <swift-dev at swift.org> wrote:
> 
> HI everybody:
> 
> I have a question about NSDictionary.
> I defined a instance of NSDictionary, when I set value to this instance , it throw a exception.
> 
> code:
> let userDict = NSDictionary()
> userDict.setValue(self.userName.text!, forUndefinedKey: "userName2")
> 
> exception:
> 2016-02-24 00:50:26.931 TravelAssistant[1900:792534] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__NSDictionary0 0x7fc430404810> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key userName2.'
> 
> How to fix this bug?
> 
> thx.
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