CFURLError.improperArgumentsError Indicates one or more arguments are improper. Declarationcase improperArgumentsError See AlsoConstantsCFURLError.unknownErrorCFURLError.unknownSchemeErrorCFURLError.resourceNotFoundErrorCFURLError.resourceAccessViolationErrorCFURLError.remoteHostUnavailableErrorCFURLError.unknownPropertyKeyErrorCFURLError.propertyKeyUnavailableErrorCFURLError.timeoutError