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ronald greti
800 PointsAdding a Pop of Color - Cannot invoke 'colorsArray' with an argument of type '(Int)'
I am following your course in the tutorial Adding a Pop of Color wherein I am following your instructions to add the following line…
return colorsArray(randomIndex)
but Xcode flags this as an error? ...
Cannot invoke ‘colorsArray’ with an argument of type ‘(Int)’
Can you help?
//
// ColorWheel.swift
// FunFacts
//
// Created by ronald greti on 3/28/15.
// Copyright (c) 2015 Treehouse. All rights reserved.
//
import Foundation
import UIKit
struct ColorWheel {
//------------------------------------------------------------------------------------------------------
// stored propeties...
//------------------------------------------------------------------------------------------------------
let colorsArray = [
UIColor(red: 90/255.0, green: 187/255.0, blue: 181/255.0, alpha: 1.0), //teal color
UIColor(red: 222/255.0, green: 171/255.0, blue: 66/255.0, alpha: 1.0), //yellow color
UIColor(red: 223/255.0, green: 86/255.0, blue: 94/255.0, alpha: 1.0), //red color
UIColor(red: 239/255.0, green: 130/255.0, blue: 100/255.0, alpha: 1.0), //orange color
UIColor(red: 77/255.0, green: 75/255.0, blue: 82/255.0, alpha: 1.0), //dark color
UIColor(red: 105/255.0, green: 94/255.0, blue: 133/255.0, alpha: 1.0), //purple color
UIColor(red: 85/255.0, green: 176/255.0, blue: 112/255.0, alpha: 1.0), //green color
]
//------------------------------------------------------------------------------------------------------
// methods...
//------------------------------------------------------------------------------------------------------
func randomColor() -> UIColor {
var unsignedArrayCount = UInt32(colorsArray.count)
var unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
var randomIndex = Int(unsignedRandomNumber)
return colorsArray(randomIndex)
}
}
2 Answers
Steve Hunter
57,682 PointsHi Ronald,
I think you need to use square brackets to access the item at a position in an array.
So, return colorsArray[randomIndex] should work OK.
Give that a whirl and let me know if it works!
Steve.
ronald greti
800 PointsOops! you are right, it was just a question of using [] instead of (). I missed that. The msg from Xcode was too cryptic for me to get that. Thanks for answering such a trivial mistake.
Steve Hunter
57,682 PointsYeah - the error messages are pretty obscure at times!
Glad it worked!
Steve.