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iOS

Posted by Sergio Pichardo
Sergio Pichardo
24,963 Points

Type methods: Why don't you need an init() method with type classes? (I thought it was required with reference types)

Example: 

class Calculator {
  class func squarRoot(value: Double) -> Double {
     return sqrt(value)
  }
}

1 Answer

Joe Beltramo
Joe Beltramo
22,311 Points

In the case of a class that does not have any stored properties, there is no need for an init() method as you have nothing to initialize. The purpose of the method is to guarantee that all stored properties have a value at the time of creation.

Therefore, no properties, no init :]

Side note, if a stored property is initially given a value, you are also not required to provide an init()

Example:

class Calculator {
    var text: String = ""

    class func squareRoot(value: Double) -> Double {
        return sqrt(value)
    }
}