不能與 '）（' 類型的索引

Question

我一直recieving這個錯誤下標類型爲 '[UIImage的]的值爲'：

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

這裏是我的代碼：

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() 

} 

的錯誤發生在這一行：

chnagingImageView.image = images[index += 1] 

任何幫助，將不勝感激。請注意，我看到另一個問題，這只是遊樂場的一個問題，它提供的解決方案是刷新代碼。但是，這不起作用，我仍然收到錯誤。

Answer 1

它更改爲

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

因爲index += 1返回() =>數組不能與索引類型獲得值()

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] 
    } 
    } 
     }