如何为照片库制作 UIImagePickerController 和我的问题

Posted 2023-02-25

【中文标题】如何为照片库制作 UIImagePickerController 和我的问题

【英文标题】：How to make UIImagePickerController for photo library and my problem

【发布时间】：2020-03-20 09:46:26

【问题描述】：

我使用 UIImagePickerController 并且我希望我的应用程序允许我从照片库中选择一张照片。 我有一个界面屏幕：

我有图像视图，我希望在单击图像视图时打开画廊。接下来，我选择了一张图片，并将其插入到这个圈子中。

我在照片库中选择了一张图片后，我的图片没有显示在圆圈中。请帮帮我:(

我的代码：

import UIKit

class ProfileSettingsViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate 

  @IBOutlet weak var cancelButton: UIButton!
  @IBOutlet weak var uploadNewPhoto: UIImageView!


  override func viewDidLoad() 
    super.viewDidLoad()
    //    installCancelButtonColor()
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ProfileSettingsViewController.imageTapped(gesture:)))
    uploadNewPhoto.addGestureRecognizer(tapGesture)
    uploadNewPhoto.isUserInteractionEnabled = true
  

  @objc func imageTapped(gesture: UIGestureRecognizer) 
    // if the tapped view is a UIImageView then set it to imageview
    if (gesture.view as? UIImageView) != nil 
      print("Image Tapped")
      let imageC = UIImagePickerController()
      imageC.delegate = self
      imageC.sourceType = UIImagePickerController.SourceType.photoLibrary
      present(imageC, animated: true)

    
  

  func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) 
      picker.dismiss(animated: true)

      guard let image = info[.editedImage] as? UIImage else 
          print("No image found")
          return
      

      // print out the image size as a test
      print(image.size)
  

  //  func installCancelButtonColor() 
  //    cancelButton.layer.borderWidth = 1.5
  //    let cancelButtonColor = UIColor(red: 0.20, green: 0.28, blue: 0.36, alpha: 1)
  //    cancelButton.layer.borderColor = cancelButtonColor.cgColor
  //  


  @IBAction func cancelButton(_ sender: Any) 
    dismiss(animated: true, completion: nil)
  

【问题讨论】：

什么不起作用？明确说明您的错误

@Toto 我在照片库中选择了一张图片后，我的图片没有显示在圆圈中。

【参考方案1】：

要在 UIImageView 中查看图像，您需要进行设置。

 if let image = info[.editedImage] as? UIImage 
     uploadNewPhoto.image = image
 

如果您没有从didFinishPickingMediaWithInfo 获取图像，请尝试将.editedImage 替换为.originalImage

并且最好在您打开PhotoLibrary这个时指定

imageC.mediaTypes = ["public.image"] // this will allow the user to see and select photos only