相机图像调整大小

Question

我有一个应用程序，我正在开发的功能允许用户拍照或从照片库中选取图像。该代码有效，但图像总是显示大于UIImageView框。该框被设置为在故事板中“缩放纵横比”，但相机图像拒绝符合。

下面的代码：

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) 
    } 

我怎么chosenImage，以符合框或方面配合？

Answer 1

试试这个方法，请：

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) 
    } 

为什么ScaleAspectFill和clipsToBounds = true有看这个问题Why scale to fill give bigger image than UIImageVIew size? (using swift)

，如果你想更多的了解，然后检查这一How to scale a UIImageView proportionally?