swift - 如何让 ImagePicker 为 Firebase 中的所有用户生成标准圆形图像？

Question

所以我有一个图像选择器，但它不会强制将图像切割成一个圆圈，以便它们是统一的。

我曾尝试使用 CropViewController 和 RSKImageCropper，但出现了各种错误。

 @IBAction func press(_ sender: Any) {

    imagePicker = UIImagePickerController()
    imagePicker.delegate = self

    if UIImagePickerController.isSourceTypeAvailable(.camera){
        imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
        imagePicker.cameraCaptureMode  = .photo
    } else {
        imagePicker.sourceType = .photoLibrary    
    }
    self.present(imagePicker, animated: true, completion: nil)       
    self.imagePicker.allowsEditing = true     
}

////再往下

func cropViewController(_ cropViewController: TOCropViewController?, didCropToCircularImage image: UIImage?, with cropRect: CGRect, angle: Int) {
    // 'image' is the newly cropped, circular version of the original image
}

UIImagePickerControllerDelegate 方法

extension FeedVC : UIImagePickerControllerDelegate, UINavigationControllerDelegate {

     func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        let image = info[UIImagePickerControllerOriginalImage] as! UIImage
        self.takenImage = image
        self.UIImageView.image = self.takenImage
        self.dismiss(animated: true, completion: nil)

        if UIImageView.image == nil {
             //Do stuff for nil image
        }
    }

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

最后，我需要的是图像选择器将图像裁剪成圆形，使其均匀。

Answer 1

您还可以裁剪图像正方形大小，例如 40x40，然后设置 UIImageView 属性以获得圆形可见性。

override func viewDidLoad() {
    super.viewDidLoad()
    imageView.clipsToBounds = true
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    imageView.layer.cornerRadius = imageView.frame.width / 2
}

并确保 imageView 约束具有 1:1 的纵横比