EZFormRadioField.valueOrUnselectedAtIndex throws NSInvalidArgumentException about ezform

[jessedc]

Using valueForKey: with NSDictionary requires a string parameter as per the NSDictionary docs:

"Note that when using key-value coding, the key must be a string."

The EZForm code you've highlighted is also explicitly using NSStrings when fetching the key from orderedKeys which is correct use of the API.

NSDictionary also defers to objectForKey: in most uses of valueForKey:

Discussion
If key does not start with “@”, invokes objectForKey:. If key does start with “@”, strips the “@” and invokes [super valueForKey:] with the rest of the key.

I'm in two minds about whether or not this is an issue. I can't see a lot of use cases for NSNumber keys in a form, but having said that you could easily rewrite that method to read self.choices[key] and it probably wouldn't cause any harm.