How do you call an Objective-C variadic method from Swift?

Question

Supposing I have a class in Objective-c with a static method like this:

+ (NSError *)executeUpdateQuery:(NSString *)query, ...;

How do I ca

Answer 1

In Objective C

MyClassName.h

+ (BOOL)executeSQL:(NSString *)sql args:(va_list)args;

MyClassName.m

+ (BOOL)executeSQL:(NSString *)sql args:(va_list)arguments
{
    NSLogv(sql, arguments);

    sql = [[NSString alloc] initWithFormat:sql arguments:arguments];
    va_end(arguments);
}

Swift - add in its class Works perfect

protocol CFormatFunction {
   class func executeSQLArg(format: String, _ args: CVarArgType...) -> Bool
}

extension MyClassName : CFormatFunction {
   class func executeSQLArg(format: String, _ args: CVarArgType...) -> Bool
   {
        return MyClassName(format, args:getVaList(args))
   }
 }

---

How to use

Swift

MyClassName.executeSQLArg(query, "one","two",3)

Objetive C

[MyClassName executeSQLArg:query, @"one",@"two",@3]