小编use*_*494的帖子

尝试以编程方式设置按钮的图像时,我收到"nil"错误.我究竟做错了什么？这些都不是可选项.

@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 …

我希望创建一个侧滑图片库.有许多教程展示如何制作一个带有tableview的教程,但我想创建一个以图像开头的图库,并允许您向左或向右滑动以进行浏览.有没有人知道github扩展或教程,或有任何知识帮助指出我正确的方向？谢谢.

像这样的东西:

嗨，我正在尝试将八进制数字快速转换为十进制。最简单的方法是什么？