[swift-dev] about NSDictionary question

[张辉]

No such method


I use swift2.1


At 2016-02-24 17:58:20, "David Smith" <david_smith at apple.com> wrote:
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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