相機圖像調整大小

Question

我有一個應用程序，我正在開發的功能允許用戶拍照或從照片庫中選取圖像。該代碼有效，但圖像總是顯示大於UIImageView框。該框被設置爲在故事板中「縮放縱橫比」，但相機圖像拒絕符合。

下面的代碼：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
     if let chosenImage = info[UIImagePickerControllerOriginalImage] as? UIImage{ 

      imageField.image = chosenImage 
     } else{ 
      //error message goes here 
     } 
     self.dismiss(animated: true, completion: nil) 
    } 

我怎麼chosenImage，以符合框或方面配合？

Answer 1

試試這個方法，請：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) { 
     if let chosenImage = info[UIImagePickerControllerOriginalImage] as? UIImage{ 

      imageField.image = chosenImage 
      imageField.contentMode = UIViewContentMode.scaleToFill 
      imageField.clipsToBounds = true 
     } else{ 
      //error message goes here 
     } 
     self.dismiss(animated: true, completion: nil) 
    } 

爲什麼ScaleAspectFill和clipsToBounds = true有看這個問題Why scale to fill give bigger image than UIImageVIew size? (using swift)

，如果你想更多的瞭解，然後檢查這一How to scale a UIImageView proportionally?