从Array中选择UIlabel background Color，然后从数组中删除它。 （SWIFT）

Question

屏幕上有3个UiLabels。我有一个颜色的数组，例如红，绿，蓝。我想将每个UiLabel的背景设置为数组中的颜色，然后从数组中删除颜色，这样就没有2个UiLabel具有相同的颜色。

我试图做这样的事情。它在数组中选择一个随机字符串但是我不能将它分配给uilabel，因为它不是UIColor类型。

override func viewDidLoad() {
    super.viewDidLoad()


    let Colorarray = ["UIColor.redColor()", "UIColor.greenColor()", "UIColor.blueColor()"]


    let randomIndex = Int(arc4random_uniform(UInt32(Colorarray.count)))


    print(randomIndex)
    self.left.text = (Colorarray[randomIndex])


    self.left.backgroundColor =  (Colorarray[randomIndex])
    self.middle.backgroundColor = (Colorarray[randomIndex])
    self.right.backgroundColor = (Colorarray[randomIndex])



}

这是我试过的第二个代码

var colorArray = [（UIColor.redColor（），“Red”），（UIColor.greenColor（），“Green”），（UIColor.blueColor（），“Blue”）]

//random color
let randomIndex = Int(arc4random_uniform(UInt32(colorArray.count)))

//accessing color
var (color, name) = colorArray[randomIndex]
self.left.text = name
self.left.backgroundColor = color
let leftColorRemoval = (colorArray.removeAtIndex(randomIndex))
print(leftColorRemoval)

var (mcolor, mname) = colorArray[randomIndex]
self.middle.text = mname
self.middle.backgroundColor = mcolor
let middleColorRemoval = (colorArray.removeAtIndex(randomIndex))
print(middleColorRemoval)

var (rcolor, rname) = colorArray[randomIndex]
self.right.text = rname
self.right.backgroundColor = rcolor
let rightColorRemoval = (colorArray.removeAtIndex(randomIndex))
print(rightColorRemoval)

Answer 1

您可以存储包含实际UIColor和字符串值的元组数组。这使得您可以提供所需的任何字符串值：

let colorArray = [(UIColor.redColor(), "Red"), (UIColor.greenColor(), "Green"), (UIColor.blueColor(), "Blue")]

然后，访问随机颜色：

let (color, name) = colorArray[randomIndex]

self.left.text = name

self.left.backgroundColor = color
...

在我看来，您的代码实际上并没有删除随机颜色。以下是您实际操作的方式（多种方式之一）：

let random = { () -> Int in
    return Int(arc4random_uniform(UInt32(colorArray.count)))
} // makes random number, you can make it more reusable

let (leftColor, leftName) = colorArray.removeAtIndex(random()) // removeAtIndex: returns the removed tuple
let (middleColor, middleName) = colorArray.removeAtIndex(random())
let (rightColor, rightName) = colorArray.removeAtIndex(random())