如何通过Swift编程自动拍照？

Question

我正在开发使用iPhone相机的Swift.

我使用以下代码检查相机:

if UIImagePickerController.isSourceTypeAvailable(.Camera) {   
    let picker = UIImagePickerController()
        picker.delegate = self
        picker.sourceType = UIImagePickerControllerSourceType.Camera
        picker.allowsEditing = true  
        self.presentViewController(picker, animated: true)
    } else {
        print("can't find camera")
    }
}

我使用以下代码打开相机.

presentViewController(imagePicker, animated: true, completion: nil)

我参考了以下链接和电话takePicture(),但似乎没有工作.

但我总是需要通过点击快门按钮手动拍摄照片.是否可以在Swift中以编程方式拍摄照片？

提前致谢.

Answer 1

1)检查视图控制器类中是否有这些代理:

 UIImagePickerControllerDelegate, UINavigationControllerDelegate

2)检查您的plist是否具有YES的权限

Privacy - Photo Library Usage Description
Privacy - Camera Usage Description

如果你愿意,我使用这个代码(swift 3):

    let imagePicker = UIImagePickerController()
    imagePicker.sourceType = .photoLibrary
    imagePicker.delegate =  self
    self.present(imagePicker, animated: true, completion: nil)

对于相机,只需更改"photoLibrary"

    imagePicker.sourceType = .camera

3)为了获得图片,你必须实现委托didFinishPickingMediaWithInfo:

extension YourViewController: 
                             UIImagePickerControllerDelegate, 
                             UINavigationControllerDelegate 
{

  func imagePickerController(
              _ picker:                           UIImagePickerController,  
              didFinishPickingMediaWithInfo info: [String : Any]) 
  {
    imagePicker.dismiss(animated: true, completion: nil)
    let image = info[UIImagePickerControllerOriginalImage] as? UIImage
    print("picture taken: \(image)")
  }
}

Answer 2

因为你想完全自动拍照，所以UIImagePickerController根本不需要。而是直接使用 AVFoundation。

这篇文章将非常有帮助：iOS 上的相机捕捉。