Question

我有一个UITableViewCell按钮来拍摄图像并将其放回到单元格中。当我调用UIImagePickerController并拍摄图像时，它不会调用以下代理

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject], sender:AnyObject)

这是我在UITableViewController中的takePhotoFunction：

@IBAction func takePhoto(sender: AnyObject) {
let imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
imagePickerController.allowsEditing = true

let actionSheet = UIAlertController(title: "Choose image souruce", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet)

actionSheet.addAction(UIAlertAction(title: "Take Image", style: UIAlertActionStyle.Default, handler: { (alert:UIAlertAction!) -> Void in
    imagePickerController.sourceType = UIImagePickerControllerSourceType.Camera
    self.presentViewController(imagePickerController, animated: true, completion: nil)
}))

actionSheet.addAction(UIAlertAction(title: "Photo Library", style: UIAlertActionStyle.Default, handler: { (alert:UIAlertAction!) -> Void in
    imagePickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
    self.presentViewController(imagePickerController, animated: true, completion: nil)
}))
actionSheet.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil))
self.presentViewController(actionSheet, animated: true, completion: nil)}

Answer 1

在 Swift 3 中，现在调用此委托方法：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])

区别在于：

下划线_选择器前
信息类型从 [String：AnyObject] 更改为 [String：Any]

我有同样的问题，当我做出这些改变时，它起作用了。

Answer 2

<强> 1。别忘了添加File
2.在UIImagePickerControllerDelegate,UINavigationControllerDelegate添加viewDidLoad()
3.添加委托方法

picker.delegate = self

希望有所帮助：）

Answer 3

快速4.2

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
   if let chosenImage = info[.originalImage] as? UIImage{
        //use image
    }
}

Answer 4

对Swift 4.2使用以下方法：

public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]){
}

Answer 5

对于 Swift 4.2

此方法已重命名，现在应按以下方式调用。我遇到了同样的问题，该委托方法未调用，但此后，我的问题解决了。

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

}

Answer 6

对于 SWIFT 4.2

当程序未调用委托方法时，我遇到了类似的问题。

在viewDidLoad（）方法中，imagePicker.delegate = self应该不，但是在打开图库的方法中。像这样：

func openGallery()
    {
        let imagePicker = UIImagePickerController()
        imagePicker.delegate = self

        imagePicker.sourceType = .photoLibrary

        self.present(imagePicker, animated: true, completion: nil)
   }

Answer 7

您必须以这种方式使用该方法，因为没有声明的委托方法：

func imagePickerController(picker: UIImagePickerController!, didFinishPickingMediaWithInfo info:[NSObject : AnyObject]) {
        println("Calling")       
}

Apple文档参考：https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIImagePickerControllerDelegate_Protocol/index.html#//apple_ref/occ/intfm/UIImagePickerControllerDelegate/imagePickerController:didFinishPickingMediaWithInfo：

Answer 8

委托方法现在称为imagePickerController.delegate

我看到您的didFinishPickingMediaWithInfo已正确设置，因此我假设您意外地将InsertOrReplace代码放在ViewController类之外

Answer 9

对于 Swift 5 ，我们进行了一些细微的更新。

这是我创建的用于在iOS 12.2上进行测试的单屏示例

import UIKit
import UIKit


class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    //MARK: Open Photos Galley Button Action method
    @IBAction func openPhotosGallery(_ sender: Any) {

        if UIImagePickerController.isSourceTypeAvailable(.photoLibrary){
            let myPickerController = UIImagePickerController()
            myPickerController.delegate = self;
            myPickerController.sourceType = .photoLibrary
            self.present(myPickerController, animated: true, completion: nil)
        }
    }

    //MARK: ImagePicker Controller Delegate methods
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        self.dismiss(animated: true, completion: nil)
    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        let chosenImage = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
        imageView.image = chosenImage
        dismiss(animated:true, completion: nil)
    }
}

Answer 10

如果您的UIImagePickerController（）对象的allowEditing属性设置为true，则应在委托方法中将图像获取为：

如果allowsEditing == true

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

        if let pickedImage = info[.editedImage] as? UIImage {

              //do something with image

        }

           dismiss(animated: true, completion: nil)

    }

如果allowsEditing == false

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

            if let pickedImage = info[.originalImage] as? UIImage {

                  //do something with image

            }

               dismiss(animated: true, completion: nil)

        }

Answer 11

也许有时是由ARC引起的？我在控制器中而不是在函数中声明了适配器的变量（对于以下iOS14之前的UIImagePickerController，对于iOS 14+则当前的PHPickerViewController）。它对我有用。

var adapter: PHPickerAdapter?

@objc func openGallery(recognizer: UITapGestureRecognizer) {
    adapter = PHPickerAdapter()
    adapter?.delegate = self
    adapter?.showPhotoPicker(.photoLibrary, from: self)
}

Answer 12

在 Swift 5 中，我们需要使用：

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

didFinishPickingMediaWithInfo不叫Swift

12 个答案: