NSError code check: Binary operator '==' cannot be applied to two Int operands

Question

Can someone tell me what I'm doing wrong here? "error" is NSError returned from CloudKit.

if error.code == Int(CKErrorCode.NetworkFailure) {
    //do something
}

Gives me this error:

Binary operator '==' cannot be applied to two Int operands

If I do this, it works fine:

if error.code == 4 {
    //do something
}

Where 4 is the actual error code.

I think it's message that's messed up. Is perhaps the error an optional? — T. Benjamin Larsen, Sep 05 '15 at 20:23
Show more code, how is `error`, `error.code` and `CKErrorCode` defined? — Kametrixom, Sep 05 '15 at 20:29
Sorry, I thought the subject covered that. "error" is just an NSError that is returned from CloudKit. NSError definition is fairly standard. I did check and neither are optionals. — William T., Sep 05 '15 at 20:30
Perhaps similar as in http://stackoverflow.com/a/24509912/1187415. — Martin R, Sep 05 '15 at 20:36
How about comparing to CKErrorCode.NetworkFailure.rawValue ? — T. Benjamin Larsen, Sep 05 '15 at 20:42

score 4 · Accepted Answer · answered Sep 05 '15 at 20:56

The problem here is that Int doesn't have a constructor that takes CKErrorCode as input.

As in the comments, the way to compare the two values would be:

if error.code == CKErrorCode.NetworkFailure.rawValue {
    //do something
}

Thankfully, the error messages have been improved for XCode 7 and Swift 2, so you would see:

Cannot invoke initializer for type 'Int' with an argument list of type '(CKErrorCode)'

Which is a much better indicator of what went wrong.

1 Answers1