xcode - Segoe UI图像到Swift的View Controller

我试图将一个uiimage传递给我的secondViewController，但是我的编码一直出错。如何将uiimage分割到第二个viewcontroller？
视图控制器.swift

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if (segue.identifier == "test") {

       let destViewController : SecondViewController = segue.destinationViewController as SecondViewController

        destViewController.mainpictures = "background"
    }

第二视图控制器

class SecondViewController: UIViewController {

    var mainpictures = String ()

    @IBOutlet var mainImage: UIImageView!

    override func viewDidLoad() {

        self.mainImage.text = mainpictures

        super.viewDidLoad()
    }

最佳答案

编写此代码

if let image = UIImage(named: mainpictures) {
     self.mainImage.image = image
}

而不是这个

self.mainImage.text = mainpictures