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iOS Swift 2.0 Protocols Swift 2.0 Protocols Protocols With Methods

Christoph Hellmuth
Christoph Hellmuth
11,604 Points
Posted by Christoph Hellmuth
Christoph Hellmuth
11,604 Points

I declare everything here but there is still the error that I am not following the directions: protocol ColorSwitchable

I declare everything here but there is still the error that I am not following the directions: protocol ColorSwitchable { func switchColor (color:Color) }

2 Answers

Nathan Tallack
Nathan Tallack
22,159 Points
Nathan Tallack
Nathan Tallack
22,159 Points

So in the first step you define the protocol. It will look something like this:

protocol ColorSwitchable {
  func switchColor(color: Color)
}

In the second step you need to apply this protocol to your WiFiLamp class. You do that by popping it in after the Class name like this:

class WifiLamp: ColorSwitchable {

Now your class needs to have that function defined to comply with the protocol, so you will add the function in your class that will look like this:

  func switchColor (color: Color) {
    self.color = color
  }

So you need to remember that the protocol defines WHAT is required, then when you apply that to something like a class you need to then implement what is required in that class to comply.

Christoph Hellmuth
Christoph Hellmuth
11,604 Points
Christoph Hellmuth
Christoph Hellmuth
11,604 Points

Thank you :) I still couldn't find what the error was, espacillialy that in my playground everything worked perfectly.

juzek
juzek
16,109 Points
juzek
juzek
16,109 Points

There is a missing space, I've just had the same issue. Compare: func switchColor(color: Color) func switchColor(color:Color)