无法使用类型为“()”的索引为类型为“[UIImage]”的值下标

Question

我一直收到这个错误：

cannot subscript a value of type '[UIImage]' with an index of type '()'

这是我的代码：

let images: [UIImage] = [
    UIImage(named: "profilePicture.jpg")!,
    UIImage(named: "back3.jpg")!,
    UIImage(named: "back1.jpg")!]
var index = 0
let animationDuration: TimeInterval = 0.25
let switchingInterval: TimeInterval = 3

let chnagingImageView = UIImageView()

override func viewDidLoad() {

    chnagingImageView.frame = CGRect(x: 0, y: 300, width: view.frame.width, height: 200)
    view.addSubview(chnagingImageView)

    chnagingImageView.image = images[index += 1]
    animateImageView()

}

错误发生在这一行：

chnagingImageView.image = images[index += 1]

如有任何帮助，我们将不胜感激。请注意，我看到另一个问题，这只是游乐场的问题，它提供的解决方案只是刷新代码。但是，这不起作用，我仍然收到错误消息。

Answer 1

改为

 index += 1
 chnagingImageView.image = images[index]

因为index += 1 return () => 数组无法获取索引类型为()

的值

Answer 2

 let images: [UIImage] = [
        UIImage(named: "profilePicture.jpg")!,
        UIImage(named: "back3.jpg")!,
        UIImage(named: "back1.jpg")!]
    var index = 0
    let animationDuration: TimeInterval = 0.25
    let switchingInterval: TimeInterval = 3

    let chnagingImageView = UIImageView()

    override func viewDidLoad() {

        chnagingImageView.frame = CGRect(x: 0, y: 300, width: view.frame.width, height: 200)
        view.addSubview(chnagingImageView)

    for myimage in images.count-1
     { 
      if myimage==1 
     { 
    chnagingImageView.image = images[myimage] 
     } 
    } 
       }

无法使用类型为“()”的索引为类型为“[UIImage]”的值下标

Cannot subscript a value of type '[UIImage]' with an index of type '()'

ios

swift3

uiimage

subscript

xcplayground