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iOS Build a Simple iPhone App with Swift Improving Our User Interface Adding a Pop of Color

Steve Dowd
Steve Dowd
1,745 Points
Posted by Steve Dowd
Steve Dowd
1,745 Points

Why is it neccessary for a contant to be created to use the function of ColorWheel?

Why must the function of ColorWheel be passed to a constant? Why does it not work if I try to call the Struct itself and use its function to assign a random color like ColorWheel.randomColor() instead of colorWheel.randomColor()?

1 Answer

Greg Kaleka
Greg Kaleka
39,021 Points
Greg Kaleka
Greg Kaleka
39,021 Points

Hi Steve,

Without seeing the full struct, the answer is probably that randomColor() is an instance method, not a type method. That means you need to create an instance of the struct in order to use its methods and properties. This is very typical behavior.

Check out this page in the Swift Language Guide for more information.

Good luck!