> On 07 Nov 2015, at 10:09, Luc Van Bogaert <[email protected]> wrote:
>
>> On 07 Nov 2015, at 01:56, Quincey Morris
>> <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> On Nov 6, 2015, at 15:23 , Luc Van Bogaert <[email protected]
>> <mailto:[email protected]>> wrote:
>>>
>>> In a tableview with a content binding and a value binding on the table cell
>>> view textfields to the model's objectValue keypaths, I'm having trouble
>>> getting the key-value validation to work correctly. In the model class, I
>>> have implemented the required validation methods (validateKey(_ :) throws),
>>> for each of the properties, but the validation method only seems to get
>>> called for scallar types and not for eg. String types. I've made sure I
>>> checked "Validates immediately" in the binding attributes.
>>
>> a. When you edit the text fields, does the model String property get updated?
>>
>> b. Can you show us an example function signature line for a scalar
>> validation method, and one for a string validation method?
>>
>> c. Can you show us an example of a model key path you’re using when binding
>> to objectValue?
>>
>> It occurs to me that there might be a bridging issue here. Note that the
>> generic validation method (which is what routes the validation to a specific
>> validate<Key> method) looks like this in the Swift version of
>> NSKeyValueCoding.h:
>>
>> public func validateValue(ioValue:
>> AutoreleasingUnsafeMutablePointer<AnyObject?>, forKey inKey: String) throws
>>
>> It’s possible that the validate<Key> method declaration needs to be
>> something like this. (According to this theory, the scalar validation works
>> because the object<->scalar conversion happens within KVC, and so it’s
>> staying within the Obj-C type world.)
>>
>> Does the model object inherit from NSObject and/or conform to NSObject
>> protocol?
>>
>
> a. Yes, I can edit the textfields in the tabel and the change is persistent
> so the model gets updated.
>
> b. For title: String property :
>
> func validateTitle(ioValue:
> AutoreleasingUnsafeMutablePointer<String?>) throws {...}
>
> For raise: Float property
>
> func validateRaise(ioValue:
> AutoreleasingUnsafeMutablePointer<NSNumber?>) throws {...}
>
>
Reading your explanation again about the bridging issue and KVC working in an
Objective-C environment, I realised that my method signature was wrong. I
changed "<String?>" to "<NSString?>"
> func validateTitle(ioValue:
> AutoreleasingUnsafeMutablePointer<NSString?>) throws {...}
This is working correctly now, the method is called when I change the table
texfield.
Thanks
--
Luc Van Bogaert
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