快速在图库中的图像视图中显示图像

Question

我是 IOS 新手，我想在从图库中挑选的 imageView 中显示图像。我还在 info.plist 中添加了照片描述。但是图像没有显示在 imageView 中。这是我的代码：

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

假设您使用的是 Swift 3.x：

你应该如下实现imagePickerController(_:didFinishPickingMediaWithInfo:)：

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)
}

而且应该不错。有什么区别？好吧：

1-删除private。

2-方法的签名不一样，文档中提到info应该是[String : Any]类型不是[String : AnyObject]。