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。私は何が間違っているのですか?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
もう一度ImageからImageを作成していると思います。
ちょうどそれをする
imageButton.setImage(images[index],forState:UIControlState.Normal)
それがうまくいくことを願っています。
またはあなたはそれを次のようにすることができます:
var images = [String]?
viewDidLoad
で
images = ["image1.png","image2.png"]
let img : UIImage = UIImage(named: images[index])!
imageButton = UIButton.buttonWithType(UIButtonType.System) as UIButton
button.frame = CGRectMake(100, 100, 100, 100)//Set your own frame
imageButton.setImage(img,forState:UIControlState.Normal)
そして、それがあなたのプロジェクトで利用可能でなければならない画像をチェックしてください
画像は画像セットとしてAssets.xcassetsにある必要があります...動作v.smooth!