swift - 图像提示 fatal error : unexpectedly found nil while unwrapping an Optional value

Question

我有一个主/详细信息应用程序，我需要从主信息中获取图像并将其放入详细信息中

虽然我有一个名为 Gerbera.png 图像的文件，但它不会显示，但它在 imageView 行上提示。另外，如何将图像从主页调用到详细信息页面？

class DetailViewController: UIViewController {

@IBOutlet weak var webView: UIWebView!

@IBOutlet weak var detailDescriptionLabel: UILabel!

@IBOutlet weak var imageView: UIImageView!

@IBOutlet weak var btnCall: UIButton!

func configureView() {
    // Update the user interface for the detail item.



    if let detail: AnyObject = detailItem {

        if let myWebview = webView {

            let stringRepresentation = MasterViewController.MyVariables.urlString?.joined(separator:"")

            print ("urlString", MasterViewController.MyVariables.urlString)
            print ("sR",stringRepresentation)

            let url = NSURL(string: stringRepresentation as! String)
            let request = URLRequest(url: url! as URL)

            myWebview.scalesPageToFit = true
            myWebview.loadRequest(request)
        }
        imageView.image = UIImage(named:"Gerbera.png")!

} }

Answer 1

请尝试此行

imageView.image = UIImage(named:"Gerbera")!