我制作了一个类question2
class Question2 {
@IBOutlet var imageView: UIImageView!
var textField: UITextField?
var textField2: UITextField?
init(img: UIImage, txt: String, txt2: String) {
imageView?.image = img
self.textField?.text = txt
self.textField2?.text = txt2
} }
在另一个类中Question2Brain
class Question2Brain {
let question = [
Question2(img: UIImage(named: "BeardQ")!, txt: "Beard", txt2: "beard"),
Question2(img: UIImage(named: "CastleQ")!, txt: "Castle", txt2: "castle"),
Question2(img: UIImage(named: "CloudQ")!, txt: "Cloud", txt2: "cloud"),
Question2(img: UIImage(named: "Elephant")!, txt: "Elephant", txt2: "elephant"),
Question2(img: UIImage(named: "RainQ")!, txt: "Rain", txt2: "rain")
] }
正如您所看到的，我创建了这个数组，并将UImages与txt和txt2一起放置在其中。简单地说，我要向用户显示一个图像，然后输入一个描述图像的输入，然后检查它是否匹配txt和txt2。在运行模拟器时，我得到以下错误：
***由于未捕获异常“nSunKnownKeyException”而终止应用程序，原因：“[
是因为我在数组中使用了UImage吗？
您的Question2类是UIViewController的子类，但您只是创建它的实例，而没有引用情节提要，因此出口将为nil。
创建一个视图控制器的多个实例并将它们放在数组中是没有意义的。
您应该使用question结构，然后将该结构的实例提供给可以显示它的视图控制器。
struct Question {
let image: UIImage
let txt: String
let txt2: String
}
let question = [
Question(img: UIImage(named: "BeardQ")!, txt: "Beard", txt2: "beard"),
Question(img: UIImage(named: "CastleQ")!, txt: "Castle", txt2: "castle"),
Question(img: UIImage(named: "CloudQ")!, txt: "Cloud", txt2: "cloud"),
Question(img: UIImage(named: "Elephant")!, txt: "Elephant", txt2: "elephant"),
Question(img: UIImage(named: "RainQ")!, txt: "Rain", txt2: "rain")
] }
