How to set default values for IBInspectable in Objective-C?

Question

I know default values of IBInspectable-properties can be set as:

@IBInspectable var propertyName:propertyType = defaultValue in Swift. But how do I achieve

Answer 1

I'm using like that

@IBInspectable var propertyNameValue:propertyType?
var propertyName:propertyType { return propertyNameValue ?? defaultValue }

if propertyNameValue has nil, propertyName will return defaultValue.