arrays - 如何从带有链接的数组中获取值？

Question

我是 swift 的新手。谁可以帮忙？我有一个包含 3 个链接的数组，如何从该数组中获取一个链接并显示在 UIImageView 中，然后显示第二个链接，然后显示第三个链接？我用一个链接制作，但不明白如何用数组制作。谢谢。

class ViewController: UIViewController {

    @IBOutlet weak var imgView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        var image = UIImage()
        var imageData: Data?
        let links = ["http://s.ill.in.ua/i/gallery/950x0/2694/146192.jpg","http://s.ill.in.ua/i/gallery/950x0/2694/146190.jpg","http://s.ill.in.ua/i/gallery/950x0/2694/146202.jpg"]
        let url = URL(string: links[0])
        do {
            imageData = try Data(contentsOf: url!)
        }
        catch {
            print("error")
        }
        if let value = imageData {
            image = UIImage(data:value)!
            imgView.image = image
        }
    }

}

Answer 1

您可以像这样轻松地迭代数组:

for link in links {
    // This will iterate through array, so you can do something specific on each step
    let url = URL(string: link)
    do {
        imageData = try Data(contentsOf: url!)
    }
    catch {
        print("error")
    }
    if let value = imageData {
        image = UIImage(data:value)!
        imgView.image = image
        print("Updated imageView with \(link)!")
    }
}