プログラムでボタンの画像を設定しようとすると、「nil」エラーが発生します。私は何を間違っていますか?これらはすべてオプションではありません。
@IBOutlet weak var scrollView: UIScrollView!
var imageButton: UIButton!
var index: Int = 0
var images: [UIImage] = [UIImage(named: "image1.png")!, UIImage(named: "image2.png")!, UIImage(named: "image3.png")!, UIImage(named: "image4.png")!, UIImage(named: "image5.png")!, UIImage(named: "image6.png")!, UIImage(named: "image7.png")!, UIImage(named: "image8.png")!, UIImage(named: "image9.png")!, UIImage(named: "image10.png")!, UIImage(named: "image11.png")!, UIImage(named: "image12.png")!, UIImage(named: "image13.png")!, UIImage(named: "image14.png")!, UIImage(named: "image15.png")!, UIImage(named: "image16.png")!, UIImage(named: "image17.png")!, UIImage(named: "image18.png")!, UIImage(named: "image19.png")!, UIImage(named: "image20.png")!, UIImage(named: "image21.png")!, UIImage(named: "image22.png")!, UIImage(named: "image23.png")!, UIImage(named: "image24.png")!, UIImage(named: "image25.png")!, UIImage(named: "image26.png")!, UIImage(named: "image27.png")!, UIImage(named: "image28.png")!, UIImage(named: "image29.png")!, UIImage(named: "image30.png")!]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
//let screenHeight = screenSize.height
let numWidth: CGFloat = 3
let numHeight: CGFloat = 10
self.scrollView.frame.size.width = screenWidth
let width: CGFloat = (self.scrollView.frame.size.width - (numWidth + 1))/3
for var i:CGFloat = 0; i < 3; ++i{
for var j:CGFloat = 0; j < 10; ++j {
let image: UIImage = images[index] as UIImage!
imageButton.setImage(image,forState:UIControlState.Normal)
imageButton.frame = CGRectMake(width*i, width*j, width, width)
self.scrollView.addSubview(imageButton)
index++
}
}
scrollView.contentSize.height = (width)*numHeight