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Currently the method signature is:
public virtual bool ValidateValue(NSObject value, string key, out NSError error)
It should be:
// -(BOOL)validateName:(id *)ioValue error:(NSError * __autoreleasing *)outError
public virtual bool ValidateValue(ref NSObject value, string key, out NSError error)
See Apple documentation for more detais:
You're right the existing signature is wrong.
Fixed in maccore/0838d3d8bd54a5c65c50474bab5d66ccf24adaa0
I have checked this issue on following builds:
Xamarin Studio : 4.2.4 (build 32)
Xamarin.iOS : 126.96.36.199 (Trial Edition)
Release ID: 402040032
Git revision: a160c35dac9ab9fd32eeadaa171216316d5a5133
Build date: 2014-03-12 13:55:08-04
Xamarin addins: a779416ceabd54981ce812771a4061c942e8b872
I have checked the signature of "ValidateValue()" method in "assembly browser" and I observed that now the signature of "ValidateValue()" method is correct . The signature of ValidateValue()" method is following:
public virtual bool ValidateValue (ref NSObject value, string key, out NSError error)
It is according to the apple documentation.
This issue is working fine. As of now, I am closing this issue.
I also observed that the new signature of "ValidateValue()" method is not updated into "Xamarin Developer Center" API section (http://iosapi.xamarin.com/index.aspx?link=M%3AMonoTouch.CoreData.NSManagedObject.ValidateValue(MonoTouch.Foundation.NSObject%2CSystem.String%2CMonoTouch.Foundation.NSError%40)).
Please update this also.