Swift 如何在 UIImagepickercontroller 中为编辑器设置编辑器裁剪大小

Question

对于我的 iOS 应用程序，我需要一个 Fotoeditor。因此我设置：

imagePicker.allowsEditing = true

现在我想更改可编辑区域的大小。

这里是可编辑区域，但我需要不同尺寸的可用图片：

如何更改此区域的大小以便为可用图像区域使用不同的大小？

这是我的 PickerController 代码

@IBOutlet weak var preview: UIImageView!

let imagePicker = UIImagePickerController()

@IBAction func selectImage(_ sender: Any) {
    imagePicker.allowsEditing = true
    imagePicker.sourceType = .photoLibrary

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

override func viewDidLoad() {
    super.viewDidLoad()

    imagePicker.delegate = self
}

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

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    dismiss(animated: true, completion: nil)
}

Answer 1

无法通过 UIImagePickerController 实现，您可以使用此库来实现此功能(GKImagePicker)。

Answer 2

使用UIImagePickerControllerEditedImage这个代码例如：-

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

Answer 3

我试图从图库或相机中保存编辑后的图像，但我在网上找不到任何东西，所以我尝试了这段代码，它成功了！ Swift4.2

if let pickedImage = info[UIImagePickerController.InfoKey.editedImage] as? UIImage{
            imageProfile.contentMode = .scaleAspectFit
            imageProfile.image = pickedImage
}

这行代码必须在函数内部

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

Answer 4

检查图像的高度和宽度:-

 func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        guard let image = info[.editedImage] as? UIImage else {return}
        imageView.image = image
        dismiss(animated: true, completion: nil)
        print(image.size.height)
        print(image.size.width)
        print(image.size)
    }

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