如何修改 imagePickerController（源相机）在按下 "Use photo" 直到拍完 4 张照片后不关闭？

Question

我想在 UIImagePickerController 关闭之前拍摄 4 张照片。如何修改？我有以下按钮操作和委托：

@IBAction func take4Photos(_ sender: Any) {
                if UIImagePickerController.isSourceTypeAvailable(.camera) {
                    let image = UIImagePickerController()
                    image.delegate = self
                    image.sourceType = .camera;
                    image.allowsEditing = false
                    self.present(image, animated: true, completion: nil)
                    
                }
            }


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

Answer 1

很遗憾，这是不可能的。 UIImagePickerController 只能选择一种媒体。如果您想要这种行为，要么必须创建自己的选择器，要么使用库。

如果您想创建自己的，请使用此资源 https://developer.apple.com/documentation/photokit/browsing_and_modifying_photo_albums

它有一个官方演示源，您可以在 2-3 小时内创建自己的演示源（我不得不做一次这个确切的问题，从像选择器这样的网格中选择多个图像和视频）

Answer 2

我会推荐你使用ImagePicker，它可以通过cocoaPods轻松安装，只需一行代码就可以满足你的要求。

let imagePickerController = ImagePickerController()
imagePickerController.imageLimit = 4

你可以查看ImagePicker图书馆here

以下是如何使用 ImagePicker 库选择多张图片。

在 Storyboard 中创建一个按钮并在 ViewController 中设置它的出口。

@IBOutlet weak var chooseImage: UIButton!

选中后如果想在VC中看到选中的图片，像这样UIImages做一个数组

var imageViews:[UIImageView] = []

然后，在viewDidLoad中，将目标添加到chooseImage按钮

chooseImage.addTarget(self, action: #selector(buttonTouched(button:)), for: .touchUpInside)

并像这样在 viewDidLoad 之外声明 buttonTouched 函数

  @objc func buttonTouched(button: UIButton) {
  let config = Configuration()
  config.doneButtonTitle = "Done"
  config.noImagesTitle = "Sorry! There are no images here!"
  config.recordLocation = false 
  config.allowVideoSelection = false. //If you don't want video recording

  let imagePicker = ImagePickerController(configuration: config)
  imagePicker.delegate = self

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

然后，最后，在extension里面，符合ImagePicker这样的委托函数。

extension OwnerAddListingFacilitiesViewController:ImagePickerDelegate {

 func cancelButtonDidPress(_ imagePicker: ImagePickerController) {
    
    imagePicker.dismiss(animated: true, completion: nil)
  }


 func wrapperDidPress(_ imagePicker: ImagePickerController, images: [UIImage]) { //Don't know what exactly this function does }

 func doneButtonDidPress(_ imagePicker: ImagePickerController, images: [UIImage]) {
    for Count in 0..<images.count {
        let imageView = UIImageView(image: images[Count])
        imageView.frame = CGRect(x: (0 * (110 * Count)), y: 0, width: 50, height: 50)
        imageViews.append(imageView)
    }
    
        imagePicker.dismiss(animated: true, completion: nil)
  }

 }

选择图片并按完成后，您将能够看到类似图片的小缩略图。

如何修改 imagePickerController（源相机）在按下 "Use photo" 直到拍完 4 张照片后不关闭？

How to modify imagePickerController (source camera) not to dismiss after pressing "Use photo" until 4 photos are taken?

xcode

uiimagepickercontroller

swift