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There appears to be an error in this challenge
The challenge calls for one to create a method to as the action for a button press. The following syntactically-correct code causes an error in the editor:
while the following code works, incorrectly:
Shouldn't the method take a parameter that represents the sender of the action?
Don AlmeidaCourses Plus Student 2,479 Points
Its optional. I think when you set the IBAction you can choose to say None as parameters. Maybe the exercise is looking for a parameter less event handler. (just a thought).