UITapGestureRecognizer對UIImageView的操作迅速

Question

我很難確定我的UITapGestureRecognizer出了什么問題，我在操作開始時就已經設置了斷點，但從未調用過它。 我正在遵循此處顯示的示例。

https://developer.apple.com/library/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Lesson4.html

我將UIImageView連接到這樣的輕擊手勢。

然后，我像這樣設置了UITapGestureRecognizer。

最后，我的代碼幾乎是演示代碼的精確副本。

import UIKit

class ViewController: UIViewController, UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate{

//MARK: Properties
@IBOutlet weak var nameTextField: UITextField!
@IBOutlet weak var mealNameLabel: UILabel!
@IBOutlet weak var imagePhotoControl: UIImageView!



override func viewDidLoad() {
    super.viewDidLoad()
    nameTextField.delegate = self;

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

//MARK: UITextFieldDelegate
func textFieldShouldReturn(textField: UITextField) -> Bool {
    textField.resignFirstResponder();
    return true;
}


func textFieldDidEndEditing(textField: UITextField) {
    mealNameLabel.text = textField.text;
}

func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    // Dismiss the picker if the user canceled.
    dismissViewControllerAnimated(true, completion: nil)
}
 // MARK: Actions
@IBAction func selectImageFromLibraryAlso(sender: UITapGestureRecognizer) {
    // Hide the keyboard.
    nameTextField.resignFirstResponder()

    // UIImagePickerController is a view controller that lets a user pick media from their photo library.
    let imagePickerController = UIImagePickerController()

    // Only allow photos to be picked, not taken.
    imagePickerController.sourceType = .PhotoLibrary

    // Make sure ViewController is notified when the user picks an image.
    imagePickerController.delegate = self

    presentViewController(imagePickerController, animated: true, completion: nil)
}

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    // The info dictionary contains multiple representations of the image, and this uses the original.
    let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage

    // Set photoImageView to display the selected image.
    imagePhotoControl.image = selectedImage

    // Dismiss the picker.
    dismissViewControllerAnimated(true, completion: nil)
}


@IBAction func setDefaultLabelText(sender: UIButton) {
    mealNameLabel.text = "Default Text"
 }
}

我只是不明白為什么當我點擊圖像時動作永遠不會被觸發。 我什至下載了演示代碼，並且按預期工作。 我確實給我的項目Food Tracker命名了空格，這可能是問題嗎？ 我基本上是在發瘋，試圖弄清楚為什么事件沒有被解雇。 我准備在項目和演示項目之間進行文件夾比較。

答案：事實證明，UIImageView的“屬性”檢查器中有一個復選框，稱為“啟用用戶交互”。 如果選中此選項，它將允許從UITapGestureRecognizer觸發觸摸事件。 另一個解決方案是按照以下答案中所述的代碼進行操作。

Answer 1

//在ViewDidLoad中設置

imagePhotoControl.userInteractionEnabled = true ;