ios - UIImagePickerController 与 ImageView

Question

我正在尝试从照片库获取图像，但遇到问题。我有 3 个不同的 ImageView。以及这些 ImageView 上的 3 种不同的点击手势。我需要选择不同的照片并将它们展示给用户。

我应该做什么？

Answer 1

• 将 UINavigationControllerDelegate、UIImagePickerControllerDelegate 添加到您的 Controller

• 创建UITapGesture的函数

  func createTapGesture(selectorName: String) -> UITapGestureRecognizer {
  
      return UITapGestureRecognizer(target: self, action: Selector(selectorName))
  }
  
  func imageTap(sender: AnyObject) {
  
      currentImageView = sender.view as! UIImageView
      pickImage()
  }
  

• 显示 ImagePickerView

  func pickImage() {
  
      let imagePicker = UIImagePickerController()
      imagePicker.delegate = self
      imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
      imagePicker.allowsEditing = false
      self.presentViewController(imagePicker, animated: true, completion: nil)
  }
  
  func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
  
      dismissViewControllerAnimated(true, completion: nil)
      currentImageView.image = image
  }
  

• 将这些代码添加到viewDidLoad

  firstImageView.addGestureRecognizer(createTapGesture("imageTap:"))
  secondImageView.addGestureRecognizer(createTapGesture("imageTap:"))
  thirdImageView.addGestureRecognizer(createTapGesture("imageTap:"))
  

• 在 IB 中，确保您的 ImageView 设置用户交互启用已选中

希望这能有所帮助