在swift中从图库中查看图像

Question

我是IOS中的新成员，我希望在图像中显示图像，这是从图库中挑选出来的。我还在info.plist中添加了照片描述。但图像未在图像查看中显示。这里是我的代码：

import UIKit 

class ViewController: UIViewController, UIImagePickerControllerDelegate,UINavigationControllerDelegate { 
    @IBOutlet weak var img: UIImageView! 
    @IBOutlet weak var imageView: UIImageView! 
    @IBOutlet var chooseBuuton: UIButton! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

    } 

    @IBAction func btnClicked() { 
     let imagePicker = UIImagePickerController() 
     imagePicker.delegate = self 
     imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary 
     imagePicker.allowsEditing = false 
     self.present(imagePicker, animated: true, completion: nil) 
    } 
    private func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) { 
     if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage { 
      //imageView.contentMode = .scaleAspectFit 
      img.image = pickedImage 
     } 
     self.dismiss(animated: true, completion: nil) 
    } 
} 

Answer 1

假设你正在使用斯威夫特3.X：

你应该实现imagePickerController(_:didFinishPickingMediaWithInfo:)如下：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage { 
     //imageView.contentMode = .scaleAspectFit 
     img.image = pickedImage 
    } 
    self.dismiss(animated: true, completion: nil) 
} 

它应该是好的去。有什么区别？井：

1-删除private。

2-该方法的签名是不一样的，如文档中所提及的，info应该是类型[String : Any]不[String : AnyObject]的。