Question

我是IOS的新手，我想在图像中显示图像，这是从gallery.And我也添加了照片描述在info.plist.But图像没有显示在imageView.Here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 ：

您应该按如下方式实施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)
}

这应该是好的。有什么区别？好：

1 - 删除private。

2 - 方法的签名不一样，如文档中所述，info的类型应为[String : Any] 而不是 [String : AnyObject]。

在swift中从gallery中显示imageview中的图像

1 个答案: