如何使用Tap Gesture从UIImageView呈现UIImagePickerController

Question

我希望视图加载默认图像，然后让用户点击该图像以从照片库中选择另一个。 我正在这样做，但是点击手势不起作用，我在做什么错？

class ProfileViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {

    let imagePicker = UIImagePickerController()
    @IBOutlet var profilePicture: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        let tap = UITapGestureRecognizer(target: self, action: Selector("selectProfilePicture"))
        profilePicture.addGestureRecognizer(tap)

        imagePicker.delegate = self
    }

    func selectProfilePicture() {

        imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
        imagePicker.allowsEditing = false
        self.presentViewController(imagePicker, animated: true, completion: nil)

    }

    func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {

        self.dismissViewControllerAnimated(true, completion: nil)
        profilePicture.image = image

    }
}

Answer 1

尝试在UIImageView上启用userInteractionEnabled ：

profilePicture.userInteractionEnabled = true

Answer 2

我倾向于只在图像上方放置一个不可见的UIButton。 最简单/最简单的方法，而不会过于复杂。