UIImageView识别器

Question

在我的应用程序中，我有一个很大的UIImageView和其他5个较小的。

我的目的是将所选小图像的内容复制到最大的图像。还要获取所选图像的名称并使用UILabel进行显示。

用UIButtons替换小图像可能更容易，并将图像显示为背景？

Answer 1

我会为每个imageView添加一个gestureRecognizer。之后，gestureRecognizer调用的函数将更改“大选择器视图”上的图像。没有内置方法来获取用户选择的图像名称。如果你真的需要这个，那么你可以升级UIImageView并添加一个fileName属性。

@IBOutlet var imageView: UIImageView!
@IBOutlet var bigPickerImageView: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    // create tap gesture recognizer
    let tapGesture = UITapGestureRecognizer(target: self, action: "tapGesture:")

    // add it to the image view;
    imageView.addGestureRecognizer(tapGesture)
    // make sure imageView can be interacted with by user
    imageView.userInteractionEnabled = true        
}

func tapGesture(gesture: UIGestureRecognizer) {
    // if the tapped view is a UIImageView then set it to imageview
    if let imageView = gesture.view as? UIImageView {  // if you subclass UIImageView, then change "UIImageView" to your subclass
        // change the image on the bigPickerImageView
        bigPickerImageView.image = imageView.image
        // if you subclass UIImageView, then you could get the filename here.
    }
}