"Array index out of range" 在 Swift 中选择照片时

Question

我想不通这是什么问题。

我有 6 张图片，当我点击它们时，它会弹出一个图片选择器。如果我选择一张有顺序的照片，比如 1,2,3,4,5,6... 就可以了。但是当我选择不是第一张的第一张照片（数组[0]）时，我得到一个错误：

`$"Array index out of range"

这是我的代码：

class SecondViewController: UIViewController,UIImagePickerControllerDelegate, UINavigationControllerDelegate {

var imagemEscolhida = -1

@IBOutlet var firstImageView: UIImageView!
@IBOutlet var secondImageView: UIImageView!
@IBOutlet var thirdImageView: UIImageView!
@IBOutlet var fourthImageView: UIImageView!
@IBOutlet var fifthImageView: UIImageView!
@IBOutlet var sixthImageView: UIImageView!


@IBAction func firstImageButton(sender: AnyObject) {

    imagemEscolhida = 1
    abreBibliotecaFotos(imagemEscolhida)

}

@IBAction func secondImageButton(sender: AnyObject) {
    imagemEscolhida = 2
    abreBibliotecaFotos(imagemEscolhida)

}

@IBAction func thirdImageButton(sender: AnyObject) {
    imagemEscolhida = 3
    abreBibliotecaFotos(imagemEscolhida)
}

@IBAction func fourthImageButton(sender: AnyObject) {
    imagemEscolhida = 4
    abreBibliotecaFotos(imagemEscolhida)
}

@IBAction func fifthImageButton(sender: AnyObject) {
    imagemEscolhida = 5
    abreBibliotecaFotos(imagemEscolhida)
}

@IBAction func sixthImageButton(sender: AnyObject) {
    imagemEscolhida = 6
    abreBibliotecaFotos(imagemEscolhida)
}

func abreBibliotecaFotos (img: Int )
{
    imagePicker.allowsEditing = false
    imagePicker.sourceType = .PhotoLibrary

    presentViewController(imagePicker, animated: true, completion: nil)
}



let imagePicker = UIImagePickerController()

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
        firstImageView.contentMode = .ScaleAspectFit

        restaurante.imagem.insert(pickedImage, atIndex: imagemEscolhida-1)

        switch imagemEscolhida
        {
        case 1:
            firstImageView.image = restaurante.imagem[0]
        case 2:
            secondImageView.image = restaurante.imagem[1]
        case 3:
            thirdImageView.image = restaurante.imagem[2]
        case 4:
            fourthImageView.image = restaurante.imagem[3]
        case 5:
            fifthImageView.image = restaurante.imagem[4]
        case 6:
            sixthImageView.image = restaurante.imagem[5]
        default:
            println("Something else")
        }



        picker.dismissViewControllerAnimated(true, completion: nil)

    }

    dismissViewControllerAnimated(true, completion: nil)
}

func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    dismissViewControllerAnimated(true, completion: nil)
}


override func viewDidLoad() {
    super.viewDidLoad()

    imagePicker.delegate = self
}


}

Answer 1

看起来 restaurante.imagem 数组是空的，你的代码崩溃了，因为你试图在索引处插入一些东西，这个索引高于数组的最大索引 - 即 0。

罪魁祸首是：

restaurante.imagem.insert(pickedImage, atIndex: imagemEscolhida-1)

Answer 2

您应该先初始化数组，然后再以正确的大小使用它。我想参考我对一个非常相似的回答。因此，在定义时将其从 0 初始化为 5，然后您的代码应该可以工作。

"Array index out of range" 在 Swift 中选择照片时

"Array index out of range" when choosing photos in Swift

arrays

uiimagepickercontroller

ios

swift