Swift doesn't see Objective-C methods with variable arguments

Question

I created Objective-C class with two methods. Both of them works with variable list of arguments:

@interface TestClass : NSObject

- (void)methodWithVariableArguments:(NSString *)string  arguments:(va_list)arguments;

- (void)methodWithVariableArguments:(NSString *)string, ...;

@end

When I try to use methods of this class in Swift code, it allows me to use only first method:

var testObject = TestClass()
testObject.methodWithVariableArguments("String", arguments: pointer)

The second one Swift can't recognize.
If I try to navigate to TestClass from Swift code, it shows me this:

class TestClass : NSObject {

    func methodWithVariableArguments(string: String!, arguments: CVaListPointer)
}

It just ignored my second method.
NSString has similar methods and both of them work in Swift.

Does anybody know how to fix it?

Update
I sent bug report to Apple. They confirmed that they have such problem.
Ticket id is 21848465. It was marked as duplicate to ticket with id 15935999. The last on has "Open" status.

s1ddok · Accepted Answer · 2015-07-15 23:26:18Z

3

It is simply impossible now. Swift can't do that. Workaround is to create a wrapper method with (va_list) arguments and pass them as arguments. If it is not your class, you could create a category or else just add it to your source.

answered Jul 15, 2015 at 23:26

s1ddok

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3 Comments

Vlad Papko Over a year ago

Are you sure that it's impossible? Do you have any proof? I am asking because NSString has the same methods, and it perfectly recognized in Swift.

s1ddok Over a year ago

NSString has Swift's methods with a list of arguments, not obj-c ones. Swift also has the feature of argument list, but it is not compatible with obj-c.

Vlad Papko Over a year ago

you was right. I sent bug report to Apple, they confirmed that they have such bug.

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